Combination of Tevatron searches for the standard model Higgs boson in the W+W- decay mode

arXiv:1001.4162v3 [hep-ex] 15 Feb 2010

Combination of Tevatron searches for the standard model Higgs boson in the W

_W

decay mode

T. Aaltonen†_,15 _{V.M. Abazov}‡_,53 _{B. Abbott}‡_,121 _{M. Abolins}‡_,106 _{B.S. Acharya}‡_,35_{M. Adams}‡_,84 _{T. Adams}‡_,80

J. Adelman†_,83 _{E. Aguilo}‡_,7 _{G.D. Alexeev}‡_,53 _{G. Alkhazov}‡_,57 _{A. Alton}mm‡_,104 _{B. ´Alvarez Gonz´alez}x†_,61

G. Alverson‡_,99 _{G.A. Alves}‡_,2 _{S. Amerio}f f †_,39 _{D. Amidei}†_,104_{A. Anastassov}†_,86 _{L.S. Ancu}‡_,52 _{A. Annovi}†_,38

J. Antos†_,58 _{M. Aoki}‡_,82_{G. Apollinari}†_,82 _{J. Appel}†_,82 _{A. Apresyan}†_,91 _{T. Arisawa}†_,46 _{Y. Arnoud}‡_,17 _{M. Arov}‡_,95

A. Artikov†_,53_{J. Asaadi}†_,128 _{W. Ashmanskas}†_,82 _{A. Askew}‡_,80 _{B. ˚Asman}‡_,62_{O. Atramentov}‡_,109 _{A. Attal}†_,59

A. Aurisano†_,128 _{C. Avila}‡_,10 _{F. Azfar}†_,70 _{J. BackusMayes}‡_,133 _{F. Badaud}‡_,16 _{W. Badgett}†_,82 _{L. Bagby}‡_,82

B. Baldin‡_,82 _{D.V. Bandurin}‡_,94 _{S. Banerjee}‡_,35 _{A. Barbaro-Galtieri}†_,72 _{E. Barberis}‡_,99 _{A.-F. Barfuss}‡_,18

P. Baringer‡_,93 _{V.E. Barnes}†_,91 _{B.A. Barnett}†_,96 _{J. Barreto}‡_,2 _{P. Barria}hh†_,40 _{J.F. Bartlett}‡_,82 _{P. Bartos}†_,58

U. Bassler‡_,21 _{D. Bauer}‡_,67 _{G. Bauer}†_,101_{S. Beale}‡_,7 _{A. Bean}‡_,93 _{P.-H. Beauchemin}†_,6 _{F. Bedeschi}†_,40

D. Beecher†_,68 _{M. Begalli}‡_,3 _{M. Begel}‡_,117 _{S. Behari}†_,96 _{C. Belanger-Champagne}‡_,62 _{L. Bellantoni}‡_,82

G. Bellettinigg †_,40_{J. Bellinger}†_,134_{J.A. Benitez}‡_,106_{D. Benjamin}†_,118_{A. Beretvas}†_,82 _{S.B. Beri}‡_,33 _{G. Bernardi}‡_,20

R. Bernhard‡_,26 _{I. Bertram}‡_,65 _{M. Besan¸con}‡_,21 _{R. Beuselinck}‡_,67 _{V.A. Bezzubov}‡_,56 _{P.C. Bhat}‡_,82

V. Bhatnagar‡_,33 _{A. Bhatti}†_,114 _{M. Binkley}∗†_,82 _{D. Bisello}f f †_,39 _{I. Bizjak}ll†_,68 _{R.E. Blair}†_,81 _{G. Blazey}‡_,85

S. Blessing‡_,80 _{C. Blocker}†_,103_{K. Bloom}‡_,108 _{B. Blumenfeld}†_,96 _{A. Bocci}†_,118 _{A. Bodek}†_,115_{A. Boehnlein}‡_,82

V. Boisvert†_,115 _{D. Boline}‡_,98 _{T.A. Bolton}‡_,94 _{E.E. Boos}‡_,55 _{G. Borissov}‡_,65 _{D. Bortoletto}†_,91 _{T. Bose}‡_,98

J. Boudreau†_,125 _{A. Boveia}†_,77 _{A. Brandt}‡_,127 _{B. Brau}a†_,77 _{A. Bridgeman}†_,87 _{L. Brigliadori}ee†_,37 _{R. Brock}‡_,106

C. Bromberg†_,106 _{G. Brooijmans}‡_,113 _{A. Bross}‡_,82 _{D. Brown}‡_,22 _{E. Brubaker}†_,83 _{X.B. Bu}‡_,8 _{D. Buchholz}‡_,86

J. Budagov†_,53 _{H.S. Budd}†_,115 _{S. Budd}†_,87 _{M. Buehler}‡_,132 _{V. Buescher}‡_,29 _{V. Bunichev}‡_,55 _{S. Burdin}nn‡_,65

K. Burkett†_,82 _{T.H. Burnett}‡_,133 _{G. Busetto}f f †_,39 _{P. Bussey}†_,64 _{C.P. Buszello}‡_,67 _{A. Buzatu}†_,6_{K.L. Byrum}†_,81

S. Cabreraz†_,118 _{C. Calancha}†_,60 _{P. Calfayan}‡_,30 _{B. Calpas}‡_,18 _{S. Calvet}‡_,19 _{E. Camacho-P´erez}‡_,50

S. Camarda†_,59 _{J. Cammin}‡_,115 _{M. Campanelli}†_,68 _{M. Campbell}†_,104 _{F. Canelli}†_,82, 83 _{A. Canepa}†_,123 _{B. Carls}†_,87

D. Carlsmith†_,134 _{R. Carosi}†_,40 _{M.A. Carrasco-Lizarraga}‡_,50 _{E. Carrera}‡_,80 _{S. Carrillo}n†_,79 _{S. Carron}†_,82

B. Casal†_,61_{M. Casarsa}†_,82 _{B.C.K. Casey}‡_,82_{H. Castilla-Valdez}‡_,50 _{A. Castro}ee†_,37 _{P. Catastini}hh†_,40 _{D. Cauz}†_,42

V. Cavalierehh†_,40 _{M. Cavalli-Sforza}†_,59 _{A. Cerri}†_,72 _{L. Cerrito}r†_,68 _{S. Chakrabarti}‡_,116 _{D. Chakraborty}‡_,85

K.M. Chan‡,90 A. Chandra‡,88 S.H. Chang†,47 Y.C. Chen†,9 M. Chertok†,73 E. Cheu‡,71 S. Chevalier-Th´ery‡,21 G. Chiarelli†_,40 _{G. Chlachidze}†_,82 _{F. Chlebana}†_,82 _{K. Cho}†_,47 _{D.K. Cho}‡_,98 _{S.W. Cho}‡_,48 _{S. Choi}‡_,49

D. Chokheli†_,53 _{J.P. Chou}†_,100 _{B. Choudhary}‡_,34 _{T. Christoudias}‡_,67 _{K. Chung}o†_,82 _{W.H. Chung}†_,134

Y.S. Chung†_,115 _{T. Chwalek}†_,28 _{S. Cihangir}‡_,82 _{C.I. Ciobanu}†_,20 _{M.A. Ciocci}hh†_,40 _{D. Claes}‡_,108 _{A. Clark}†_,63

D. Clark†_,103 _{J. Clutter}‡_,93 _{G. Compostella}†_,39_{M.E. Convery}†_,82 _{J. Conway}†_,73 _{M. Cooke}‡_,82 _{W.E. Cooper}‡_,82

M. Corbo†_,20 _{M. Corcoran}‡_,130 _{M. Cordelli}†_,38 _{F. Couderc}‡_,21 _{M.-C. Cousinou}‡_,18 _{C.A. Cox}†_,73 _{D.J. Cox}†_,73

F. Crescioligg†_,40 _{C. Cuenca Almenar}†_,78 _{J. Cuevas}x†_,61 _{R. Culbertson}†_,82 _{J.C. Cully}†_,104 _{D. Cutts}‡_,126

M. ´Cwiok‡_,36 _{D. Dagenhart}†_,82_{N. d’Ascenzo}w †_,20 _{A. Das}‡_,71 _{M. Datta}†_,82 _{G. Davies}‡_,67_{T. Davies}†_,64 _{K. De}‡_,127

P. de Barbaro†_,115 _{S. De Cecco}†_,41 _{A. Deisher}†_,72 _{S.J. de Jong}‡_,52 _{E. De La Cruz-Burelo}‡_,50 _{F. D´eliot}‡_,21

M. Dell’Orsogg†_,40 _{G. De Lorenzo}†_,59 _{C. Deluca}†_,59 _{M. Demarteau}‡_,82 _{R. Demina}‡_,115 _{L. Demortier}†_,114

J. Dengf †_,118 _{M. Deninno}†_,37 _{D. Denisov}‡_,82 _{S.P. Denisov}‡_,56 _{M. d’Errico}f f †_,39_{S. Desai}‡_,82 _{K. DeVaughan}‡_,108

A. Di Cantogg†_,40 _{H.T. Diehl}‡_,82 _{M. Diesburg}‡_,82 _{B. Di Ruzza}†_,40 _{J.R. Dittmann}†_,131 _{A. Dominguez}‡_,108

S. Donatigg †_,40 _{P. Dong}†_,82 _{M. D’Onofrio}†_,59 _{T. Dorigo}†_,39 _{T. Dorland}‡_,133 _{S. Dube}†_,109 _{A. Dubey}‡_,34

L.V. Dudko‡_,55 _{L. Duflot}‡_,19_{D. Duggan}‡_,109_{A. Duperrin}‡_,18 _{S. Dutt}‡_,33 _{A. Dyshkant}‡_,85_{M. Eads}‡_,108 _{K. Ebina}†_,46

D. Edmunds‡,106 A. Elagin†,128 J. Ellison‡,76 V.D. Elvira‡,82 Y. Enari‡,20 S. Eno‡,97R. Erbacher†,73D. Errede†,87 S. Errede†_,87_{N. Ershaidat}dd†_,20 _{R. Eusebi}†_,128_{H. Evans}‡_,88 _{A. Evdokimov}‡_,117_{V.N. Evdokimov}‡_,56 _{G. Facini}‡_,99

H.C. Fang†_,72 _{S. Farrington}†_,70 _{W.T. Fedorko}†_,83 _{R.G. Feild}†_,78 _{M. Feindt}†_,28 _{A.V. Ferapontov}‡_,126

T. Ferbel‡_,97, 115 _{J.P. Fernandez}†_,60 _{C. Ferrazza}ii†_,40 _{F. Fiedler}‡_,29 _{R. Field}†_,79 _{F. Filthaut}‡_,52 _{W. Fisher}‡_,106

H.E. Fisk‡_,82 _{G. Flanagan}t†_,91 _{R. Forrest}†_,73 _{M. Fortner}‡_,85 _{H. Fox}‡_,65 _{M.J. Frank}†_,131_{M. Franklin}†_,100

J.C. Freeman†,82 S. Fuess‡,82 I. Furic†,79 T. Gadfort‡,117 C.F. Galea‡,52 M. Gallinaro†,114 J. Galyardt†,124 F. Garberson†_,77 _{J.E. Garcia}†_,63 _{A. Garcia-Bellido}‡_,115 _{A.F. Garfinkel}†_,91_{P. Garosi}hh†_,40_{V. Gavrilov}‡_,54_{P. Gay}‡_,16

W. Geist‡_,22 _{W. Geng}‡_,18, 106 _{D. Gerbaudo}‡_,110 _{C.E. Gerber}‡_,84 _{H. Gerberich}†_,87 _{D. Gerdes}†_,104 _{Y. Gershtein}‡_,109

J.L. Gimmell†_,115 _{C.M. Ginsburg}†_,82 _{G. Ginther}‡_,82, 115 _{N. Giokaris}†_,32 _{M. Giordani}kk†_,42 _{P. Giromini}†_,38

M. Giunta†_,40_{G. Giurgiu}†_,96_{V. Glagolev}†_,53 _{D. Glenzinski}†_,82_{M. Gold}†_,111 _{N. Goldschmidt}†_,79_{A. Golossanov}†_,82

G. Golovanov‡_,53 _{B. G´omez}‡_,10 _{G. Gomez}†_,61 _{G. Gomez-Ceballos}†_,101 _{M. Goncharov}†_,101 _{O. Gonz´alez}†_,60

I. Gorelov†_,111_{A.T. Goshaw}†_,118 _{K. Goulianos}†_,114_{A. Goussiou}‡_,133 _{P.D. Grannis}‡_,116 _{S. Greder}‡_,22_{H. Greenlee}‡_,82

Z.D. Greenwood‡_,95 _{E.M. Gregores}‡_,4 _{G. Grenier}‡_,23 _{A. Gresele}f f †_,39 _{S. Grinstein}†_,59_{Ph. Gris}‡_,16 _{J.-F. Grivaz}‡_,19

A. Grohsjean‡_,21 _{C. Grosso-Pilcher}†_,83 _{R.C. Group}†_,82 _{U. Grundler}†_,87 _{S. Gr¨unendahl}‡_,82 _{M.W. Gr¨unewald}‡_,36

J. Guimaraes da Costa†_,100 _{Z. Gunay-Unalan}†_,106 _{F. Guo}‡_,116 _{J. Guo}‡_,116 _{G. Gutierrez}‡_,82_{P. Gutierrez}‡_,121

A. Haasoo‡_,113 _{C. Haber}†_,72 _{P. Haefner}‡_,30 _{S. Hagopian}‡_,80 _{S.R. Hahn}†_,82 _{J. Haley}‡_,99 _{E. Halkiadakis}†_,109

I. Hall‡_,106_{B.-Y. Han}†_,115 _{J.Y. Han}†_,115 _{L. Han}‡_,8 _{F. Happacher}†_,38 _{K. Hara}†_,45 _{K. Harder}‡_,69 _{D. Hare}†_,109

M. Hare†_,102 _{A. Harel}‡_,115 _{R.F. Harr}†_,105 _{M. Hartz}†_,125 _{K. Hatakeyama}†_,131 _{J.M. Hauptman}‡_,92 _{C. Hays}†_,70

J. Hays‡_,67 _{T. Hebbeker}‡_,24 _{M. Heck}†_,28 _{D. Hedin}‡_,85 _{J.G. Hegeman}‡_,51 _{J. Heinrich}†_,123 _{A.P. Heinson}‡_,76

U. Heintz‡,126C. Hensel‡,27 I. Heredia-De La Cruz‡,50M. Herndon†,134K. Herner‡,104G. Hesketh‡,99J. Heuser†,28 S. Hewamanage†_,131 _{D. Hidas}†_,109_{M.D. Hildreth}‡_,90_{C.S. Hill}c†_,77 _{R. Hirosky}‡_,132 _{D. Hirschbuehl}†_,28 _{T. Hoang}‡_,80

J.D. Hobbs‡_,116 _{A. Hocker}†_,82 _{B. Hoeneisen}‡_,14 _{M. Hohlfeld}‡_,29 _{S. Hossain}‡_,121 _{P. Houben}‡_,51 _{S. Hou}†_,9

M. Houlden†_,66 _{S.-C. Hsu}†_,72 _{Y. Hu}‡_,116 _{Z. Hubacek}‡_,12 _{R.E. Hughes}†_,119 _{M. Hurwitz}†_,83 _{U. Husemann}†_,78

N. Huske‡_,20 _{M. Hussein}†_,106 _{J. Huston}†_,106_{V. Hynek}‡_,12 _{I. Iashvili}‡_,112_{R. Illingworth}‡_,82 _{J. Incandela}†_,77

G. Introzzi†_,40 _{M. Iori}jj †_,41_{A.S. Ito}‡_,82 _{A. Ivanov}q†_,73 _{S. Jabeen}‡_,98 _{M. Jaffr´e}‡_,19 _{S. Jain}‡_,112 _{E. James}†_,82

D. Jamin‡_,18 _{D. Jang}†_,124 _{B. Jayatilaka}†_,118 _{E.J. Jeon}†_,47 _{R. Jesik}‡_,67_{M.K. Jha}†_,37 _{S. Jindariani}†_,82 _{K. Johns}‡_,71

C. Johnson‡_,113 _{M. Johnson}‡_,82 _{W. Johnson}†_,73_{D. Johnston}‡_,108_{A. Jonckheere}‡_,82 _{M. Jones}†_,91 _{P. Jonsson}‡_,67

K.K. Joo†_,47 _{S.Y. Jun}†_,124 _{J.E. Jung}†_,47 _{T.R. Junk}†_,82 _{A. Juste}pp‡_,82 _{E. Kajfasz}‡_,18 _{T. Kamon}†_,128

P.E. Karchin†_,105 _{D. Kar}†_,79 _{D. Karmanov}‡_,55 _{P.A. Kasper}‡_,82 _{Y. Kato}m†_,44 _{I. Katsanos}‡_,108 _{V. Kaushik}‡_,127

R. Kehoe‡_,129 _{R. Kephart}†_,82 _{S. Kermiche}‡_,18 _{W. Ketchum}†_,83 _{J. Keung}†_,123_{N. Khalatyan}‡_,82 _{A. Khanov}‡_,122

A. Kharchilava‡_,112 _{Y.N. Kharzheev}‡_,53 _{D. Khatidze}‡_,126 _{V. Khotilovich}†_,128 _{B. Kilminster}†_,82 _{D.H. Kim}†_,47

H.S. Kim†_,47 _{H.W. Kim}†_,47 _{J.E. Kim}†_,47_{M.J. Kim}†_,38 _{S.B. Kim}†_,47_{S.H. Kim}†_,45 _{Y.K. Kim}†_,83 _{N. Kimura}†_,46

M.H. Kirby‡_,86 _{L. Kirsch}†_,103 _{M. Kirsch}‡_,24 _{S. Klimenko}†_,79 _{J.M. Kohli}‡_,33 _{K. Kondo}†_,46 _{D.J. Kong}†_,47

J. Konigsberg†_,79 _{A. Korytov}†_,79 _{A.V. Kotwal}†_,118 _{A.V. Kozelov}‡_,56 _{J. Kraus}‡_,106 _{M. Kreps}†_,28 _{J. Kroll}†_,123

D. Krop†_,83 _{N. Krumnack}p†_,131_{M. Kruse}†_,118 _{V. Krutelyov}†_,77_{T. Kuhr}†_,28 _{N.P. Kulkarni}†_,105 _{A. Kumar}‡_,112

A. Kupco‡_,13 _{M. Kurata}†_,45 _{T. Kurˇca}‡_,23 _{V.A. Kuzmin}‡_,55 _{J. Kvita}‡_,11 _{S. Kwang}†_,83 _{A.T. Laasanen}†_,91

D. Lam‡_,90_{S. Lami}†_,40 _{S. Lammel}†_,82 _{S. Lammers}‡_,88 _{M. Lancaster}†_,68 _{R.L. Lander}†_,73 _{G. Landsberg}‡_,126

K. Lannonv†_,119 _{A. Lath}†_,109_{G. Latino}hh†_,40 _{I. Lazzizzera}f f †_,39 _{P. Lebrun}‡_,23 _{T. LeCompte}†_,81 _{E. Lee}†_,128

H.S. Lee†_,83 _{H.S. Lee}‡_,48 _{J.S. Lee}†_,47 _{S.W. Lee}y †_,128 _{W.M. Lee}‡_,82 _{A. Leflat}‡_,55_{J. Lellouch}‡_,20 _{S. Leone}†_,40

J.D. Lewis†_,82 _{L. Li}‡_,76 _{Q.Z. Li}‡_,82 _{S.M. Lietti}‡_,5 _{J.K. Lim}‡_,48 _{J. Linacre}†_,70 _{D. Lincoln}‡_,82 _{C.-J. Lin}†_,72

M. Lindgren†_,82 _{J. Linnemann}‡_,106 _{V.V. Lipaev}‡_,56 _{E. Lipeles}†_,123 _{R. Lipton}‡_,82 _{A. Lister}†_,63 _{D.O. Litvintsev}†_,82

C. Liu†_,125 _{T. Liu}†_,82 _{Y. Liu}‡_,8_{Z. Liu}‡_,7 _{A. Lobodenko}‡_,57 _{N.S. Lockyer}†_,123 _{A. Loginov}†_,78_{M. Lokajicek}‡_,13

L. Lovas†_,58 _{P. Love}‡_,65 _{H.J. Lubatti}‡_,133 _{D. Lucchesi}f f †_,39 _{J. Lueck}†_,28 _{P. Lujan}†_,72 _{P. Lukens}†_,82

R. Luna-Garciaqq‡_,50 _{G. Lungu}†_,114 _{A.L. Lyon}‡_,82_{R. Lysak}†_,58 _{J. Lys}†_,72 _{A.K.A. Maciel}‡_,2 _{D. Mackin}‡_,130

D. MacQueen†_,6 _{R. Madrak}†_,82 _{K. Maeshima}†_,82 _{R. Maga˜na-Villalba}‡_,50 _{K. Makhoul}†_,101 _{P. Maksimovic}†_,96

P.K. Mal‡_,71_{S. Malde}†_,70_{S. Malik}†_,68 _{S. Malik}‡_,108 _{V.L. Malyshev}‡_,53 _{G. Manca}e†_,66 _{A. Manousakis-Katsikakis}†_,32

Y. Maravin‡_,94 _{F. Margaroli}†_,91 _{C. Marino}†_,28 _{C.P. Marino}†_,87 _{A. Martin}†_,78 _{V. Martin}k†_,64 _{M. Mart´ınez}†_,59

R. Mart´ınez-Ballar´ın†_,60 _{J. Mart´ınez-Ortega}‡_,50_{P. Mastrandrea}†_,41_{M. Mathis}†_,96 _{P. M¨attig}‡_,31_{M.E. Mattson}†_,105

P. Mazzanti†_,37 _{R. McCarthy}‡_,116 _{K.S. McFarland}†_,115 _{C.L. McGivern}‡_,93 _{P. McIntyre}†_,128_{R. McNulty}j †_,66

A. Mehta†_,66 _{P. Mehtala}†_,15 _{M.M. Meijer}‡_,52_{A. Melnitchouk}‡_,107 _{L. Mendoza}‡_,10 _{D. Menezes}‡_,85_{A. Menzione}†_,40

P.G. Mercadante‡_,4 _{M. Merkin}‡_,55 _{C. Mesropian}†_,114 _{A. Meyer}‡_,24 _{J. Meyer}‡_,27 _{T. Miao}†_,82 _{D. Mietlicki}†_,104

N. Miladinovic†_,103 _{R. Miller}†_,106 _{C. Mills}†_,100 _{M. Milnik}†_,28 _{A. Mitra}†_,9 _{G. Mitselmakher}†_,79 _{H. Miyake}†_,45

S. Moed†_,100 _{N. Moggi}†_,37 _{N.K. Mondal}‡_,35_{M.N. Mondragon}n†_,82_{C.S. Moon}†_,47 _{R. Moore}†_,82 _{M.J. Morello}†_,40

J. Morlock†_,28 _{T. Moulik}‡_,93 _{P. Movilla Fernandez}†_,82 _{G.S. Muanza}‡_,18 _{A. Mukherjee}†_,82 _{M. Mulhearn}‡_,132

Th. Muller†_,28 _{J. M¨ulmenst¨adt}†_,72 _{O. Mundal}‡_,25 _{L. Mundim}‡_,3 _{P. Murat}†_,82 _{M. Mussini}ee†_,37 _{J. Nachtman}o†_,82

Y. Nagai†_,45_{J. Naganoma}†_,45 _{E. Nagy}‡_,18 _{M. Naimuddin}‡_,34 _{K. Nakamura}†_,45 _{I. Nakano}†_,43 _{A. Napier}†_,102

M. Narain‡_,126 _{R. Nayyar}‡_,34 _{H.A. Neal}‡_,104 _{J.P. Negret}‡_,10 _{J. Nett}†_,134 _{C. Neu}bb†_,123 _{M.S. Neubauer}†_,87

S. Neubauer†_,28 _{P. Neustroev}‡_,57 _{J. Nielsen}g †_,72 _{H. Nilsen}‡_,26 _{L. Nodulman}†_,81 _{H. Nogima}‡_,3 _{M. Norman}†_,74

I. Oksuzian†_,79 _{T. Okusawa}†_,44 _{D. Onoprienko}‡_,94 _{R. Orava}†_,15 _{J. Orduna}‡_,50 _{N. Osman}‡_,67 _{J. Osta}‡_,90

K. Osterberg†_,15 _{R. Otec}‡_,12_{G.J. Otero y Garz´on}‡_,1 _{M. Owen}‡_,69_{M. Padilla}‡_,76_{P. Padley}‡_,130 _{S. Pagan Griso}f f †_,39

C. Pagliarone†_,42_{E. Palencia}†_,82_{M. Pangilinan}‡_,126_{V. Papadimitriou}†_,82 _{A. Papaikonomou}†_,28 _{A.A. Paramanov}†_,81

N. Parashar‡_,89 _{V. Parihar}‡_,126 _{S.-J. Park}‡_,27 _{S.K. Park}‡_,48 _{B. Parks}†_,119 _{J. Parsons}‡_,113 _{R. Partridge}‡_,126

N. Parua‡_,88 _{S. Pashapour}†_,6 _{J. Patrick}†_,82 _{A. Patwa}‡_,117 _{G. Pauletta}kk†_,42 _{M. Paulini}†_,124 _{C. Paus}†_,101

T. Peiffer†_,28_{D.E. Pellett}†_,73_{B. Penning}‡_,82 _{A. Penzo}†_,42_{M. Perfilov}‡_,55 _{K. Peters}‡_,69 _{Y. Peters}‡_,69 _{P. P´etroff}‡_,19

T.J. Phillips†_,118 _{G. Piacentino}†_,40_{E. Pianori}†_,123 _{R. Piegaia}‡_,1_{L. Pinera}†_,79_{J. Piper}‡_,106_{K. Pitts}†_,87 _{C. Plager}†_,75

M.-A. Pleier‡_,117 _{P.L.M. Podesta-Lerma}rr‡_,50_{V.M. Podstavkov}‡_,82 _{M.-E. Pol}‡_,2 _{P. Polozov}‡_,54 _{L. Pondrom}†_,134

A.V. Popov‡_,56 _{K. Potamianos}†_,91 _{O. Poukhov}∗†_,53 _{M. Prewitt}‡_,130 _{D. Price}‡_,88 _{F. Prokoshin}aa†_,53

A. Pronko†_,82 _{S. Protopopescu}‡_,117 _{F. Ptohos}i†_,82 _{E. Pueschel}†_,124 _{G. Punzi}gg †_,40 _{J. Pursley}†_,134_{J. Qian}‡_,104

A. Quadt‡_,27 _{B. Quinn}‡_,107 _{J. Rademacker}c†_,70 _{A. Rahaman}†_,125 _{V. Ramakrishnan}†_,134 _{M.S. Rangel}‡_,19

K. Ranjan‡,34 N. Ranjan†,91 P.N. Ratoff‡,65 I. Razumov‡,56 I. Redondo†,60 P. Renkel‡,129 P. Renton†,70 M. Renz†_,28 _{M. Rescigno}†_,41_{P. Rich}‡_,69_{S. Richter}†_,28 _{M. Rijssenbeek}‡_,116 _{F. Rimondi}ee†_,37 _{I. Ripp-Baudot}‡_,22

L. Ristori†_,40 _{F. Rizatdinova}‡_,122 _{S. Robinson}‡_,67 _{A. Robson}†_,64 _{T. Rodrigo}†_,61_{T. Rodriguez}†_,123 _{E. Rogers}†_,87

S. Rolli†_,102 _{M. Rominsky}‡_,121 _{R. Roser}†_,82 _{M. Rossi}†_,42 _{R. Rossin}†_,77 _{P. Roy}†_,6 _{C. Royon}‡_,21 _{P. Rubinov}‡_,82

R. Ruchti‡_,90_{A. Ruiz}†_,61_{J. Russ}†_,124_{V. Rusu}†_,82 _{B. Rutherford}†_,82_{H. Saarikko}†_,15_{A. Safonov}†_,128 _{G. Safronov}‡_,54

G. Sajot‡_,17 _{W.K. Sakumoto}†_,115 _{A. S´anchez-Hern´andez}‡_,50 _{M.P. Sanders}‡_,30 _{B. Sanghi}‡_,82 _{L. Santi}kk †_,42

L. Sartori†_,40 _{K. Sato}†_,45 _{G. Savage}‡_,82 _{V. Saveliev}w†_,20 _{A. Savoy-Navarro}†_,20 _{L. Sawyer}‡_,95 _{T. Scanlon}‡_,67

D. Schaile‡_,30 _{R.D. Schamberger}‡_,116 _{Y. Scheglov}‡_,57 _{H. Schellman}‡_,86 _{P. Schlabach}†_,82 _{T. Schliephake}‡_,31

S. Schlobohm‡_,133 _{A. Schmidt}†_,28 _{E.E. Schmidt}†_,82 _{M.A. Schmidt}†_,83 _{M.P. Schmidt}∗†_,78 _{M. Schmitt}†_,86

C. Schwanenberger‡_,69 _{T. Schwarz}†_,73 _{R. Schwienhorst}‡_,106 _{L. Scodellaro}†_,61 _{A. Scribano}hh†_,40 _{F. Scuri}†_,40

A. Sedov†_,91 _{S. Seidel}†_,111 _{Y. Seiya}†_,44 _{J. Sekaric}‡_,93 _{A. Semenov}†_,53 _{H. Severini}‡_,121 _{L. Sexton-Kennedy}†_,82

F. Sforzagg†_,40 _{A. Sfyrla}†_,87 _{E. Shabalina}‡_,27 _{S.Z. Shalhout}†_,105 _{V. Shary}‡_,21 _{A.A. Shchukin}‡_,56 _{T. Shears}†_,66

P.F. Shepard†_,125 _{M. Shimojima}u†_,45 _{S. Shiraishi}†_,83 _{R.K. Shivpuri}‡_,34 _{M. Shochet}†_,83 _{Y. Shon}†_,134

I. Shreyber†_,54 _{V. Simak}‡_,12 _{A. Simonenko}†_,53 _{P. Sinervo}†_,6 _{V. Sirotenko}‡_,82 _{A. Sisakyan}†_,53 _{P. Skubic}‡_,121

P. Slattery‡_,115_{A.J. Slaughter}†_,82 _{J. Slaunwhite}†_,119_{K. Sliwa}†_,102 _{D. Smirnov}‡_,90 _{J.R. Smith}†_,73 _{F.D. Snider}†_,82

R. Snihur†_,6 _{G.R. Snow}‡_,108 _{J. Snow}‡_,120_{S. Snyder}‡_,117 _{A. Soha}†_,82_{S. S¨oldner-Rembold}‡_,69 _{S. Somalwar}†_,109

L. Sonnenschein‡_,24 _{A. Sopczak}‡_,65 _{V. Sorin}†_,59 _{M. Sosebee}‡_,127 _{K. Soustruznik}‡_,11 _{B. Spurlock}‡_,127

P. Squillaciotihh†_,40 _{M. Stanitzki}†_,78 _{J. Stark}‡_,17 _{R. St. Denis}†_,64 _{B. Stelzer}†_,6 _{O. Stelzer-Chilton}†_,6 _{D. Stentz}†_,86

V. Stolin‡_,54 _{D.A. Stoyanova}‡_,56 _{J. Strandberg}‡_,104 _{M.A. Strang}‡_,112 _{E. Strauss}‡_,116 _{M. Strauss}‡_,121

R. Str¨ohmer‡_,30 _{J. Strologas}†_,111 _{D. Strom}‡_,84 _{G.L. Strycker}†_,104_{L. Stutte}‡_,82 _{J.S. Suh}†_,47 _{A. Sukhanov}†_,79

I. Suslov†_,53 _{P. Svoisky}‡_,52 _{A. Taffard}f †_,87 _{M. Takahashi}‡_,69 _{R. Takashima}†_,43 _{Y. Takeuchi}†_,45 _{R. Tanaka}†_,43

A. Tanasijczuk‡_,1 _{J. Tang}†_,83 _{W. Taylor}‡_,7 _{M. Tecchio}†_,104 _{P.K. Teng}†_,9 _{J. Thom}h†_,82 _{J. Thome}†_,124

G.A. Thompson†_,87 _{E. Thomson}†_,123 _{B. Tiller}‡_,30 _{P. Tipton}†_,78 _{M. Titov}‡_,21 _{S. Tkaczyk}†_,82 _{D. Toback}†_,128

S. Tokar†_,58 _{V.V. Tokmenin}‡_,53 _{K. Tollefson}†_,106 _{T. Tomura}†_,45 _{D. Tonelli}†_,82 _{S. Torre}†_,38 _{D. Torretta}†_,82

P. Totarokk†_,42_{M. Trovato}ii†_,40 _{S.-Y. Tsai}†_,9 _{D. Tsybychev}‡_,116_{P. Ttito-Guzm´an}†_,60 _{B. Tuchming}‡_,21 _{Y. Tu}†_,123

C. Tully‡_,110 _{N. Turini}hh†_,40 _{P.M. Tuts}‡_,113 _{F. Ukegawa}†_,45 _{R. Unalan}‡_,106 _{S. Uozumi}†_,47 _{L. Uvarov}‡_,57

S. Uvarov‡_,57_{S. Uzunyan}‡_,85 _{P.J. van den Berg}‡_,51 _{R. Van Kooten}‡_,88 _{W.M. van Leeuwen}‡_,51 _{N. van Remortel}b†_,15

N. Varelas‡_,84_{A. Varganov}†_,104 _{E.W. Varnes}‡_,71 _{I.A. Vasilyev}‡_,56 _{E. Vataga}ii†_,40 _{F. V´azquez}n†_,79 _{G. Velev}†_,82

C. Vellidis†_,32 _{P. Verdier}‡_,23 _{L.S. Vertogradov}‡_,53 _{M. Verzocchi}‡_,82 _{M. Vesterinen}‡_,69 _{M. Vidal}†_,60 _{I. Vila}†_,61

D. Vilanova‡_,21_{R. Vilar}†_,61_{P. Vint}‡_,67 _{M. Vogel}†_,111_{P. Vokac}‡_,12_{I. Volobouev}y †_,72 _{G. Volpi}gg †_,40_{P. Wagner}†_,123

R.G. Wagner†_,81 _{R.L. Wagner}†_,82 _{W. Wagner}cc†_,28 _{J. Wagner-Kuhr}†_,28 _{H.D. Wahl}‡_,80 _{T. Wakisaka}†_,44

R. Wallny†_,75 _{M.H.L.S. Wang}‡_,115 _{S.M. Wang}†_,9 _{A. Warburton}†_,6 _{J. Warchol}‡_,90_{D. Waters}†_,68 _{G. Watts}‡_,133

M. Wayne‡_,90 _{G. Weber}‡_,29 _{M. Weber}ss‡_,82 _{M. Weinberger}†_,128 _{J. Weinelt}†_,28_{W.C. Wester III}†_,82 _{M. Wetstein}‡_,97

A. White‡_,127 _{B. Whitehouse}†_,102_{D. Whiteson}f †_,123_{D. Wicke}‡_,29 _{A.B. Wicklund}†_,81 _{E. Wicklund}†_,82 _{S. Wilbur}†_,83

G. Williams†_,6 _{H.H. Williams}†_,123_{M.R.J. Williams}‡_,65 _{G.W. Wilson}‡_,93 _{P. Wilson}†_,82 _{S.J. Wimpenny}‡_,76

B.L. Winer†_,119 _{P. Wittich}h†_,82 _{M. Wobisch}‡_,95 _{S. Wolbers}†_,82 _{C. Wolfe}†_,83 _{H. Wolfe}†_,119 _{D.R. Wood}‡_,99

T. Wright†_,104 _{X. Wu}†_,63 _{F. W¨urthwein}†_,74 _{T.R. Wyatt}‡_,69 _{Y. Xie}‡_,82 _{C. Xu}‡_,104 _{S. Yacoob}‡_,86 _{A. Yagil}†_,74

R. Yamada‡_,82 _{K. Yamamoto}†_,44 _{J. Yamaoka}†_,118_{U.K. Yang}s†_,83_{W.-C. Yang}‡_,69_{Y.C. Yang}†_,47 _{W.M. Yao}†_,72

T. Yasuda‡_,82 _{Y.A. Yatsunenko}‡_,53_{Z. Ye}‡_,82_{G.P. Yeh}†_,82_{K. Yi}o†_,82 _{H. Yin}‡_,8 _{K. Yip}‡_,117_{J. Yoh}†_,82_{H.D. Yoo}‡_,126

C. Zeitnitz‡_,31 _{S. Zelitch}‡_,132 _{Y. Zeng}†_,118 _{X. Zhang}†_,87 _{T. Zhao}‡_,133 _{Y. Zheng}d†_,75 _{B. Zhou}‡_,104 _{J. Zhu}‡_,116

M. Zielinski‡_,115 _{D. Zieminska}‡_,88 _{L. Zivkovic}‡_,113 _{S. Zucchelli}ee†_,37 _{V. Zutshi}‡_,85 _{and E.G. Zverev}‡55

(The CDF† _{and D0}‡ _{Collaborations)} 1_{Universidad de Buenos Aires, Buenos Aires, Argentina} 2_{LAFEX, Centro Brasileiro de Pesquisas F´ısicas, Rio de Janeiro, Brazil}

3_{Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil} 4_{Universidade Federal do ABC, Santo Andr´e, Brazil}

5_{Instituto de F´ısica Te´orica, Universidade Estadual Paulista, S˜ao Paulo, Brazil} 6_{Institute of Particle Physics: McGill University, Montr´eal,}

Qu´ebec, Canada; Simon Fraser University, Burnaby, British Columbia, Canada; University of Toronto, Toronto, Ontario,

Canada; and TRIUMF, Vancouver, British Columbia, Canada

7_{Simon Fraser University, Burnaby, British Columbia,}

Canada; and York University, Toronto, Ontario, Canada

8_{University of Science and Technology of China, Hefei, People’s Republic of China} 9_{Institute of Physics, Academia Sinica, Taipei, Taiwan, Republic of China}

10_{Universidad de los Andes, Bogot´a, Colombia} 11_{Center for Particle Physics, Charles University,}

Faculty of Mathematics and Physics, Prague, Czech Republic

12_{Czech Technical University in Prague, Prague, Czech Republic} 13_{Center for Particle Physics, Institute of Physics,}

Academy of Sciences of the Czech Republic, Prague, Czech Republic

14_{Universidad San Francisco de Quito, Quito, Ecuador} 15_{Division of High Energy Physics, Department of Physics,}

University of Helsinki and Helsinki Institute of Physics, FIN-00014, Helsinki, Finland

16_{LPC, Universit´e Blaise Pascal, CNRS/IN2P3, Clermont, France} 17_{LPSC, Universit´e Joseph Fourier Grenoble 1, CNRS/IN2P3,}

Institut National Polytechnique de Grenoble, Grenoble, France

18_{CPPM, Aix-Marseille Universit´e, CNRS/IN2P3, Marseille, France} 19_{LAL, Universit´e Paris-Sud, CNRS/IN2P3, Orsay, France} 20_{LPNHE, Universit´es Paris VI and VII, CNRS/IN2P3, Paris, France}

21_{CEA, Irfu, SPP, Saclay, France}

22_{IPHC, Universit´e de Strasbourg, CNRS/IN2P3, Strasbourg, France}

23_{IPNL, Universit´e Lyon 1, CNRS/IN2P3, Villeurbanne, France and Universit´e de Lyon, Lyon, France} 24_{III. Physikalisches Institut A, RWTH Aachen University, Aachen, Germany}

25_{Physikalisches Institut, Universit¨at Bonn, Bonn, Germany} 26_{Physikalisches Institut, Universit¨at Freiburg, Freiburg, Germany}

27_{II. Physikalisches Institut, Georg-August-Universit¨at G¨ottingen, G¨ottingen, Germany} 28_{Institut f¨ur Experimentelle Kernphysik, Karlsruhe Institute of Technology, Karlsruhe, Germany}

29_{Institut f¨ur Physik, Universit¨at Mainz, Mainz, Germany} 30_{Ludwig-Maximilians-Universit¨at M¨unchen, M¨unchen, Germany} 31_{Fachbereich Physik, University of Wuppertal, Wuppertal, Germany}

32_{University of Athens, 157 71 Athens, Greece} 33_{Panjab University, Chandigarh, India}

34_{Delhi University, Delhi, India}

35_{Tata Institute of Fundamental Research, Mumbai, India} 36_{University College Dublin, Dublin, Ireland}

37_{Istituto Nazionale di Fisica Nucleare Bologna,} ee_{University of Bologna, I-40127 Bologna, Italy} 38_{Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, I-00044 Frascati, Italy}

39_{Istituto Nazionale di Fisica Nucleare, Sezione di Padova-Trento,} f f_{University of Padova, I-35131 Padova, Italy} 40_{Istituto Nazionale di Fisica Nucleare Pisa,} gg_{University of Pisa,}

hh_{University of Siena and} ii_{Scuola Normale Superiore, I-56127 Pisa, Italy} 41_{Istituto Nazionale di Fisica Nucleare, Sezione di Roma 1,}

jj_{Sapienza Universit`a di Roma, I-00185 Roma, Italy} 42_{Istituto Nazionale di Fisica Nucleare Trieste/Udine,}

I-34100 Trieste, kk_{University of Trieste/Udine, I-33100 Udine, Italy} 43_{Okayama University, Okayama 700-8530, Japan}

44_{Osaka City University, Osaka 588, Japan} 45_{University of Tsukuba, Tsukuba, Ibaraki 305, Japan}

46_{Waseda University, Tokyo 169, Japan}

47_{Center for High Energy Physics: Kyungpook National University, Daegu,}

Korea; Seoul National University, Seoul, Korea; Sungkyunkwan University, Suwon, Korea; Korea Institute of Science and Technology Information,

Daejeon, Korea; Chonnam National University, Gwangju, Korea; Chonbuk National University, Jeonju, Korea

48_{Korea Detector Laboratory, Korea University, Seoul, Korea} 49_{SungKyunKwan University, Suwon, Korea}

50_{CINVESTAV, Mexico City, Mexico}

51_{FOM-Institute NIKHEF and University of Amsterdam/NIKHEF, Amsterdam, The Netherlands} 52_{Radboud University Nijmegen/NIKHEF, Nijmegen, The Netherlands}

53_{Joint Institute for Nuclear Research, Dubna, Russia}

54_{Institution for Theoretical and Experimental Physics, Moscow, Russia} 55_{Moscow State University, Moscow, Russia}

56_{Institute for High Energy Physics, Protvino, Russia} 57_{Petersburg Nuclear Physics Institute, St. Petersburg, Russia}

58_{Comenius University, 842 48 Bratislava, Slovakia; Institute of Experimental Physics, 040 01 Kosice, Slovakia} 59_{Institut de Fisica d’Altes Energies, Universitat Autonoma de Barcelona, E-08193, Bellaterra (Barcelona), Spain}

60_{Centro de Investigaciones Energeticas Medioambientales y Tecnologicas, E-28040 Madrid, Spain} 61_{Instituto de Fisica de Cantabria, CSIC-University of Cantabria, 39005 Santander, Spain}

62_{Stockholm University, Stockholm, Sweden, and Uppsala University, Uppsala, Sweden} 63_{University of Geneva, CH-1211 Geneva 4, Switzerland}

64_{Glasgow University, Glasgow G12 8QQ, United Kingdom} 65_{Lancaster University, Lancaster LA1 4YB, United Kingdom} 66_{University of Liverpool, Liverpool L69 7ZE, United Kingdom} 67_{Imperial College London, London SW7 2AZ, United Kingdom} 68_{University College London, London WC1E 6BT, United Kingdom} 69_{The University of Manchester, Manchester M13 9PL, United Kingdom}

70_{University of Oxford, Oxford OX1 3RH, United Kingdom} 71_{University of Arizona, Tucson, Arizona 85721, USA}

72_{Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA} 73_{University of California, Davis, Davis, California 95616, USA}

74_{University of California, San Diego, La Jolla, California 92093, USA} 75_{University of California, Los Angeles, Los Angeles, California 90024, USA}

76_{University of California, Riverside, Riverside, California 92521, USA} 77_{University of California, Santa Barbara, Santa Barbara, California 93106, USA}

78_{Yale University, New Haven, Connecticut 06520, USA} 79_{University of Florida, Gainesville, Florida 32611, USA} 80_{Florida State University, Tallahassee, Florida 32306, USA} 81_{Argonne National Laboratory, Argonne, Illinois 60439, USA} 82_{Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA} 83_{Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA}

84_{University of Illinois at Chicago, Chicago, Illinois 60607, USA} 85_{Northern Illinois University, DeKalb, Illinois 60115, USA}

86_{Northwestern University, Evanston, Illinois 60208, USA} 87_{University of Illinois, Urbana, Illinois 61801, USA} 88_{Indiana University, Bloomington, Indiana 47405, USA} 89_{Purdue University Calumet, Hammond, Indiana 46323, USA} 90_{University of Notre Dame, Notre Dame, Indiana 46556, USA}

91_{Purdue University, West Lafayette, Indiana 47907, USA} 92_{Iowa State University, Ames, Iowa 50011, USA} 93_{University of Kansas, Lawrence, Kansas 66045, USA} 94_{Kansas State University, Manhattan, Kansas 66506, USA} 95_{Louisiana Tech University, Ruston, Louisiana 71272, USA} 96_{The Johns Hopkins University, Baltimore, Maryland 21218, USA}

97_{University of Maryland, College Park, Maryland 20742, USA} 98_{Boston University, Boston, Massachusetts 02215, USA} 99_{Northeastern University, Boston, Massachusetts 02115, USA} 100_{Harvard University, Cambridge, Massachusetts 02138, USA}

101_{Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA} 102_{Tufts University, Medford, Massachusetts 02155, USA}

103_{Brandeis University, Waltham, Massachusetts 02254, USA} 104_{University of Michigan, Ann Arbor, Michigan 48109, USA} 105_{Wayne State University, Detroit, Michigan 48201, USA} 106_{Michigan State University, East Lansing, Michigan 48824, USA}

107_{University of Mississippi, University, Mississippi 38677, USA} 108_{University of Nebraska, Lincoln, Nebraska 68588, USA} 109_{Rutgers University, Piscataway, New Jersey 08855, USA}

110_{Princeton University, Princeton, New Jersey 08544, USA} 111_{University of New Mexico, Albuquerque, New Mexico 87131, USA}

112_{State University of New York, Buffalo, New York 14260, USA} 113_{Columbia University, New York, New York 10027, USA} 114_{The Rockefeller University, New York, New York 10021, USA}

115_{University of Rochester, Rochester, New York 14627, USA} 116_{State University of New York, Stony Brook, New York 11794, USA}

117_{Brookhaven National Laboratory, Upton, New York 11973, USA} 118_{Duke University, Durham, North Carolina 27708, USA} 119_{The Ohio State University, Columbus, Ohio 43210, USA}

120_{Langston University, Langston, Oklahoma 73050, USA} 121_{University of Oklahoma, Norman, Oklahoma 73019, USA} 122_{Oklahoma State University, Stillwater, Oklahoma 74078, USA} 123_{University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA}

124_{Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA} 125_{University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA}

126_{Brown University, Providence, Rhode Island 02912, USA} 127_{University of Texas, Arlington, Texas 76019, USA} 128_{Texas A&M University, College Station, Texas 77843, USA}

129_{Southern Methodist University, Dallas, Texas 75275, USA} 130_{Rice University, Houston, Texas 77005, USA} 131_{Baylor University, Waco, Texas 76798, USA} 132_{University of Virginia, Charlottesville, Virginia 22901, USA} 133_{University of Washington, Seattle, Washington 98195, USA} 134_{University of Wisconsin, Madison, Wisconsin 53706, USA}

(Dated: May 29, 2018)

We combine searches by the CDF and D0 collaborations for a Higgs boson decaying to W+

W−_{. The}

data correspond to an integrated total luminosity of 4.8 (CDF) and 5.4 (D0) fb−1 _{of p¯p collisions}

at √s = 1.96 TeV at the Fermilab Tevatron collider. No excess is observed above background expectation, and resulting limits on Higgs boson production exclude a standard-model Higgs boson in the mass range 162–166 GeV at the 95% C.L.

PACS numbers: 13.85.Rm, 14.80.Bn

Finding the last unobserved fundamental particle in the standard model (SM), the Higgs boson, is a major goal of particle physics, and the search for its existence is a central component of Fermilab’s Tevatron program. Direct searches at the CERN LEP collider have set a limit on the Higgs boson mass of mH>114.4 GeV at the 95%

C.L. [1]. Combining this limit with precision electroweak measurements constrains the mass of the SM Higgs boson to be less than 186 GeV at the 95% C.L. [2]. The favored mass range therefore places the SM Higgs boson within the reach of the experiments at the Fermilab Tevatron collider.

In this Letter, we combine searches for Higgs bosons (H) decaying to W+_W− _{performed by the CDF and D0}

Collaborations [3, 4]. These searches are particularly sen-sitive to a Higgs boson with mass 130<mH<200 GeV.

The data analyzed correspond to integrated luminosities of 4.8 fb−1 _{and 5.4 fb}−1 _{collected with the CDF and D0}

detectors, respectively. We use all significant production modes, namely, gluon-gluon fusion (gg→H), associated

∗_Deceased

production (q ¯q→W H or ZH), and vector boson fusion (q ¯q→q¯qH, where the quarks radiate weak gauge bosons that fuse to form the H, and is referred to as VBF).

The event selections used in the CDF and D0 analyses are similar. Both collaborations select events with large missing transverse energy and two oppositely charged, isolated leptons, targeting the H→W+_W− _{signal in}

which both W bosons decay leptonically. The D0 selec-tion classifies events in three channels, e+_e−_{, e}±_µ∓_{, and}

µ+_µ−_{. The CDF selection separates opposite-sign}

di-lepton candidate events into five non-overlapping chan-nels, classifying events by their jet multiplicity (0, 1, or ≥ 2); the 0- and 1-jet channels are further divided de-pending on whether one or both leptons are in the central part of the detector. In addition, CDF searches for Higgs boson events containing same-sign lepton pairs, mainly produced in W H and ZH associated production.

The presence of neutrinos in the final state prevents full reconstruction of the Higgs boson mass. Other vari-ables are used to search for a signal in the presence of appreciable background. For example, the azimuthal an-gle between the leptons in signal events is smaller on average than that in background events due to the scalar nature of the Higgs boson and the parity violation in W±

decays. The missing transverse energy is larger, and the total transverse energy of the jets is smaller, in signal events than in background events. The final discrimi-nants are binned neural-network outputs based on sev-eral kinematic input variables [3, 4]. A dedicated network is trained for each Higgs boson mass tested. For CDF, the inputs include likelihoods constructed from matrix-element probabilities. Compared with earlier Tevatron H→W+_W− _{analyses, the new analyses use larger data}

samples, include all significant signal production mecha-nisms, and have undergone additional improvements in search sensitivity.

The Higgs boson signals are simulated with pythia [5], using CTEQ5L [6] (CDF) and CTEQ6L1 [7] (D0) par-ton distribution functions (PDF) at leading order (LO). We normalize our predictions for the Higgs boson sig-nals to the most recent higher-order perturbative QCD calculations available. References [8, 9] and references therein provide the steps used to calculate the gg→H cross section. The MSTW 2008 next-to-next-to-leading order (NNLO) PDF set [10] is used to predict the gg→H production cross section. The calculations of associ-ated production and VBF cross sections are described in Refs. [11–13]. The branching fractions for the Higgs boson decays are obtained from hdecay [14]. After all se-lections, the total number of expected Higgs boson events is approximately 30 per experiment for mH=165 GeV,

which corresponds to the region of greatest sensitivity. Both experiments determine the multijet background by studying control samples, which are then extrapo-lated into the signal regions. For CDF, backgrounds from SM W W , W Z, ZZ, W γ, Drell-Yan, and t¯t production are generated using the pythia, mc@nlo [15], and the ub/eb [16] programs. Backgrounds from W +jets pro-cesses, including (for CDF) semileptonic diboson events, single top, and semileptonic t¯t events, are modeled us-ing W +jets data events and a measurement of the rate at which jets are misidentified as leptons. For D0, these backgrounds are generated using pythia, alpgen [17], and comphep [18], with pythia providing parton-showering and hadronization for all generators.

The diboson backgrounds are normalized using next-to-leading order (NLO) calculations from mcfm [19]. The t¯t and single top production cross sections are taken from Refs. [20, 21] and Ref. [22] respectively. NNLO cal-culations [23] are used by both the CDF and D0 Collabo-rations for the Drell-Yan background, and by D0 for the inclusive W /Z processes. Other backgrounds are nor-malized to experimental data. Both collaborations use NLO simulations and data control samples to improve the modeling of differential distributions. Systematic un-certainties on the rates of the expected signal and the expected backgrounds, as well as on the shapes of the final discriminants, are included. More details are given in Refs. [3, 4].

We perform the combination twice, using Bayesian and

modified frequentist approaches in turn. We check the consistency of the results to verify that the final result does not depend on the details of the statistical formula-tion. Both combinations test signal mass hypotheses in 5 GeV steps for values of mH between 130 and 200 GeV,

i.e., the mass range in which H→W+_W− _{is the}

domi-nant decay mode. These two combinations give similar results (the limits agree within 5%). Both methods use the distributions of the final discriminants, and not just the total event counts passing selection requirements.

Both statistical procedures form, for a given Higgs bo-son mass, a combined likelihood (including priors on sys-tematic uncertainties, π(~θ)) based on the product of like-lihoods for the individual channels, each of which in turn is a product over histogram bins:

L(R, ~s,~b|~n, ~θ) × π(~θ) = NC Y i=1 NYbins j=1 µnij ij e−µij nij! × nYsys k=1 e−θ2 k/2 (1) where the first product is over the number of chan-nels (NC), and the second product is over histogram

bins containing nij events, binned in ranges of the

fi-nal neural-network discriminants used for the individ-ual analyses. The predictions for the bin contents are µij = R × sij(~θ) + bij(~θ) for channel i and histogram

bin j, where sij and bij represent the expected SM

sig-nal and background in the bin, and R is a scaling factor applied to the signal. By scaling all signal contributions by the same factor we make the assumption that the rel-ative contributions of the different processes at each mH

are as given by the SM. Systematic uncertainties are pa-rameterized by the dependence of sij and bij on ~θ. Each

of the nsys components of ~θ, θk, corresponds to a single

independent source of systematic uncertainty scaled by its standard deviation, and each parameter may have an impact on several sources of signal and background in different channels, thus accounting for correlations.

In the Bayesian method we assume a uniform prior in the signal yield. Gaussian priors are assumed for the θk,

truncated so that no prediction is negative. The posterior density function is then integrated over the θk (including

correlations) and a 95% C.L. upper limit on R, Rlim,

satisfies RRlim 0 R L(R, ~s,~b|~n, ~θ)π(~θ)d~θdR R∞ 0 R L(R, ~s,~b|~n, ~θ)π(~θ)d~θdR = 0.95. (2) The modified frequentist technique uses the statisti-cal variable CLs, defined in Ref. [24], to test hypotheses

which correspond to the presence or absence of Higgs boson signals. The test statistic is the log-likelihood ratio LLR = −2 lnp(data|s+b)p(data|b) , where p(data|s + b) and

p(data|b) are the probabilities that the data are drawn from the s+b and b-only hypotheses respectively. The probabilities p are computed using the best-fit values of

the parameters θk, separately for each of the two

hy-potheses [25]. The use of these fits extends the proce-dure used at LEP [24], improving the sensitivity when the expected signals are small and the uncertainties on the backgrounds are large. Two p-values are com-puted: CLb= p(LLR≥ LLRobs|b) and CLs+b= p(LLR≥

LLRobs|s + b), where LLRobs is the value of the test

statistic computed for the data. The ratio CLs =

CLs+b/CLb is used to define confidence intervals and is

chosen to reduce the potential for excluding a signal for which there is insufficient sensitivity. If CLs<0.05 for a

particular choice of s+b, that hypothesis is excluded at the 95% C.L. Systematic uncertainties are included by fluctuating the predictions for sij and bij when

generat-ing the pseudoexperiments used to compute CLs+b and

CLb.

Though many sources of systematic uncertainty differ between the experiments and analyses, all appropriate correlations are taken into account in the combined lim-its. The dominant systematic uncertainties arise from cross section calculations for the signals and the back-grounds; these are correlated between the experiments. Variations of the parton distribution functions and the renormalization and factorization scales give rise to un-certainties of 11% for the gluon-gluon fusion process [26], 5% for associated W H and ZH production [11, 12], and 10% for VBF [11, 13]. CDF, which uses analyses sepa-rated in jet multiplicity bins, applies a channel (jet bin) dependent uncertainty of 7% to 70% and a gluon PDF uncertainty of 8% on gg→H, following the treatment discussed in Ref. [26]. For the gluon-gluon fusion sig-nal process, we study the effects on the acceptance and the kinematics of scale variations, gluon PDF variations, and the differences between next-to-next-to-leading log calculations and the generators used for the central pre-dictions, using the fehip and hnnlo programs [8, 27]. We find additional uncertainties of 5% to 10%. The pri-mary background, W+_W− _{production, has a cross}

sec-tion uncertainty of 7% and a similar study of the ac-ceptance and kinematics finds additional uncertainties of approximately 1% to 5%. The systematic uncertainties on W Z, ZZ, tt, single top production, and Drell-Yan production range from 7% to 10%. The uncertainties on the multijet background are uncorrelated between the experiments and range from 2% to 15%. The uncertain-ties on the yields of W +jets and W γ(+jets) range from 7% to 30%, but these have small effects on the results be-cause the rates of these backgrounds are low. Bebe-cause the methods of estimating the W + jets and W γ(+jets) back-grounds differ between CDF and D0, we assume there is no correlation between these rates. The uncertainties on the lepton identification and the trigger efficiencies are uncorrelated between the experiments and range from 2% to 6%. The uncertainty on the integrated luminos-ity of 6% is taken to be correlated between the signal and the Monte-Carlo-based background predictions, and

partially correlated between the experiments, via the 4% uncertainty on the inelastic p¯p cross section [28]. Ad-ditional details related to the treatment of systematic uncertainties are given in Refs. [3, 4]. As bin by bin uncertainties arising from the statistical uncertainty in the Monte Carlo (and in some cases data) samples were shown to affect the observed and expected limits by less than 1%, they are neglected.

To better visualize the impact of the data events, we combine the histograms of the final discriminants, adding the contents of bins with similar s/b ratios, so as not to dilute the impact of highly-sensitive bins with those with less discriminating power. Figure 1 shows the signal ex-pectation and the data with the background subtracted, as a function of the s/b ratio of the collected bins. The background model has been fit to the data, and the uncer-tainties on the background are those after the systematic uncertainties have been constrained by the fit. No excess of candidate events in the highest s/b bins relative to the background expectation is observed.

-40 -20 0 20 40 60 -4 -3.5 -3 -2.5 -2 -1.5 -1 -0.5 0 log₁₀(s/b) Events/0.267 CDF + D0 Run II L=4.8-5.4 fb-1 mH=165 GeV Data-Background Signal ±1 s.d. on Background

FIG. 1: (color online). Background-subtracted data distribu-tions for the discriminant histograms, summed for bins with similar s/b, for the mH = 165 GeV combined search. The

background has been fit to the data under the b-only hypoth-esis, and the uncertainty on the background is the post-fit systematic uncertainty. The signal, which is normalized to the SM expectation, is shown with a filled histogram. The un-certainties shown on the background-subtracted data points are the square roots of the post-fit background predictions in each bin, representing the expected statistical uncertainty on the data.

Before extracting the combined limits, we study the LLR distributions for the s+b and b-only hypotheses, shown in Fig. 2 as functions of mH. The separation

between the median LLRb and LLRs+b divided by the

widths is a measure of the discriminating power of the search. The value of LLRobsrelative to the expected s+b

and b-only distributions indicates whether the observed data are more consistent with the presence of signal, or not. No significant excess of data above the background expectation is seen for any value of mH. Because the

same data events are used to construct the observed LLR at each mH tested, the LLR values are highly correlated

and 4 described below. (GeV) H m 130 140 150 160 170 180 190 200 LLR -5 0 5 10 15 (GeV) H m 130 140 150 160 170 180 190 200 LLR -5 0 5 10 15 b LLR s+b LLR obs LLR σ 1 ± b LLR σ 2 ± b LLR -1 L=4.8-5.4 fb CDF+D0 Run II

FIG. 2: (color online). Distributions of LLR as functions of the Higgs boson mass. We display the median values of the LLR distribution for the b-only hypothesis (LLRb), the s+b

hypothesis (LLRs+b), and for the data (LLRobs). The shaded

bands indicate the 68% and 95% probability regions in which the LLR is expected to fluctuate, in the absence of signal.

We extract limits on SM Higgs boson production in p¯p collisions at√s = 1.96 TeV in the mH = 130-200 GeV

mass range. We present our results in terms of Rlim, the

ratio of the limits obtained to the rate predicted by the SM, as a function of the Higgs boson mass. We assume the production fractions for W H, ZH, gg→H, and VBF, and the Higgs boson decay branching fractions, are those predicted by the SM. A value of Rlimless than or equal

to one indicates a Higgs boson mass that is excluded at the 95% C.L.

The ratios of the expected and observed limits to the SM cross section are shown in Fig. 3 as a function of mH.

The observed and median expected ratios are listed in Ta-ble I, with observed (expected) values for the Bayesian method of 1.04 (0.92) at mH = 160 GeV, 0.93 (0.87) at

mH = 165 GeV, and 1.26 (1.04) at mH = 170 GeV. We

use piecewise linear interpolations to display the combi-nation results in Figs. 2–4, and to quote the observed and expected excluded mass ranges. We exclude the SM Higgs boson in the mass range 162 to 166 GeV. The Bayesian calculation, chosen a priori, was used for this exclusion. The corresponding expected exclusion, from 159 to 169 GeV, encompasses the observed exclusion. The CLs calculation yields similar results, as shown in

Fig. 4. The 1-CLs distribution, which can be directly

interpreted as the level of exclusion of our search, is dis-played as a function of the Higgs boson mass. For in-stance, our expected limit shows that in the absence of signal the median 1-CLs value with which we expect to

exclude a SM Higgs boson of mass 165 GeV is 97%. In summary, we present the first combined Teva-tron search for the SM Higgs boson using the H→W+_W− _{decay mode. No significant excess of}

can-didates is found above the background expectation for 130<mH<200 GeV. We exclude the mass range from

1 10 130 140 150 160 170 180 190 200 1 10 mH(GeV) Rlim CDF + D0 Run II L=4.8-5.4 fb-1 Expected Observed Expected ±1σ Expected ±2σ SM=1

FIG. 3: (color online). Observed and expected (median, for the background-only hypothesis) 95% C.L. upper limits on SM Higgs boson production. The shaded bands indicate the 68% and 95% probability regions in which Rlim is expected

to fluctuate, in the absence of signal. The limits displayed in this figure are obtained with the Bayesian calculation.

(GeV) H m 130 140 150 160 170 180 190 200 s 1-CL 0.6 0.7 0.8 0.9 1 1.1 1.2 (GeV) H m 130 140 150 160 170 180 190 200 s 1-CL 0.6 0.7 0.8 0.9 1 1.1 1.2 -1 L=4.8-5.4 fb CDF+D0 Run II Expected s 1-CL Observed s 1-CL σ 1 ± Expected σ 2 ± Expected 95% C.L.

FIG. 4: (color online). Distribution of 1-CLs as a function

of the Higgs boson mass obtained with the CLs method. The

shaded bands indicate the 68% and 95% probability regions in which the LLR is expected to fluctuate, in the absence of signal.

162 to 166 GeV at the 95% C.L. This is the first di-rect constraint on the mass of the Higgs boson beyond that obtained at LEP.

Acknowledgements

We thank the Fermilab staff and the technical staffs of the participating institutions for their vital contribu-tions. This work was supported by DOE and NSF (USA), CONICET and UBACyT (Argentina), CNPq, FAPERJ, FAPESP and FUNDUNESP (Brazil), CRC Program, CFI, NSERC and WestGrid Project (Canada), CAS and CNSF (China), Colciencias (Colombia), MSMT and GACR (Czech Republic), Academy of Finland (Finland), CEA and CNRS/IN2P3 (France), BMBF and DFG (Ger-many), Ministry of Education, Culture, Sports, Science and Technology (Japan), World Class University Pro-gram, National Research Foundation (Korea), KRF and KOSEF (Korea), DAE and DST (India), SFI (Ireland),

TABLE I: Ratios, Rlim, of the median expected and observed 95% C.L. limits to the SM cross section for the combination of

CDF and D0 analyses as a function of the Higgs boson mass in GeV, obtained with the Bayesian (upper) and the CLs (lower)

methods. Bayesian 130 135 140 145 150 155 160 165 170 175 180 185 190 195 200 Expected 3.24 2.63 2.12 1.92 1.59 1.25 0.92 0.87 1.04 1.26 1.56 2.07 2.40 3.09 3.55 Observed 4.65 4.18 3.58 2.61 2.17 1.96 1.04 0.93 1.26 1.20 1.34 2.14 2.42 4.07 4.47 CLs 130 135 140 145 150 155 160 165 170 175 180 185 190 195 200 Expected 3.26 2.52 2.18 1.87 1.53 1.24 0.89 0.84 1.06 1.28 1.56 2.07 2.46 3.17 3.62 Observed 4.49 4.06 3.45 2.49 2.12 1.84 0.98 0.89 1.21 1.18 1.31 2.15 2.36 4.10 4.35

INFN (Italy), CONACyT (Mexico), NSC(Republic of China), FASI, Rosatom and RFBR (Russia), Slovak R&D Agency (Slovakia), Ministerio de Ciencia e Inno-vaci´on, and Programa Consolider-Ingenio 2010 (Spain), The Swedish Research Council (Sweden), Swiss National Science Foundation (Switzerland), FOM (The Nether-lands), STFC and the Royal Society (UK), and the A.P. Sloan Foundation (USA).

With visitors to CDF froma†_{University of Massachusetts}

Amherst, Amherst, Massachusetts 01003, b†_Universiteit

Antwerpen, B-2610 Antwerp, Belgium, c†_{University of}

Bris-tol, Bristol BS8 1TL, United Kingdom,d†_{Chinese Academy of}

Sciences, Beijing 100864, China,e†_{Istituto Nazionale di Fisica}

Nucleare, Sezione di Cagliari, 09042 Monserrato (Cagliari), Italy, f †_{University of California Irvine, Irvine, CA 92697,} g†_{University of California Santa Cruz, Santa Cruz, CA}

95064, h†_{Cornell University, Ithaca, NY 14853,} i†_University

of Cyprus, Nicosia CY-1678, Cyprus, j†_{University College}

Dublin, Dublin 4, Ireland, k†_{University of Edinburgh,}

Ed-inburgh EH9 3JZ, United Kingdom, l†_{University of Fukui,}

Fukui City, Fukui Prefecture, Japan 910-0017, m†_Kinki

Uni-versity, Higashi-Osaka City, Japan 577-8502, n†_Universidad

Iberoamericana, Mexico D.F., Mexico, o†_{University of Iowa,}

Iowa City, IA 52242, p†_{Iowa State University, Ames, IA}

50011, q†_{Kansas State University, Manhattan, KS 66506,} r†_{Queen Mary, University of London, London, E1 4NS,}

UK,s†_{University of Manchester, Manchester M13 9PL, UK,} t†_{Muons, Inc., Batavia, IL 60510,} u†_{Nagasaki Institute of}

Applied Science, Nagasaki, Japan, v†_{University of Notre}

Dame, Notre Dame, IN 46556, w†_{Obninsk State}

Univer-sity, Obninsk, Russia, x†_{University de Oviedo, E-33007}

Oviedo, Spain,y†_{Texas Tech University, Lubbock, TX 79609,} z†_{IFIC(CSIC-Universitat de Valencia), 56071 Valencia, Spain,} aa†_{Universidad Tecnica Federico Santa Maria, 110v}

Val-paraiso, Chile,bb†_{University of Virginia, Charlottesville, VA}

22906, cc†_{Bergische Universit¨at Wuppertal, 42097}

Wupper-tal, Germany, dd†_{Yarmouk University, Irbid 211-63, Jordan,}

and ll†_{On leave from J. Stefan Institute, Ljubljana,}

Slove-nia, and with visitors to D0 from mm‡_{Augustana College,}

Sioux Falls, SD, USA,nn‡_{The University of Liverpool,}

Liver-pool, UK,oo‡_{SLAC, Menlo Park, CA, USA,}pp‡_ICREA/IFAE,

Barcelona, Spain, qq‡_{Centro de Investigacion en}

Computa-cion - IPN, Mexico City, Mexico, rr‡_{ECFM, Universidad}

Autonoma de Sinaloa, Culiac´an, Mexico, and ss‡_{Universit¨at}

Bern, Bern, Switzerland.

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