The ALICE experiment at the LHC
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(23) . =² 1B3-A36ZA.?LM\458RM.?T.Q<*5A1B3NQ^B^oNQ-AN$58\4Zvm,P35A5A3v-=581oN$T t?t Ä 3ÅVÌ ! <>.?- Ä tx36ÅVÌ! moRSLMLHNQLMLS. 5A1B3DZA3v^BNQ-8N$5ARS.?T.$<*5A1B3DUBRM¹3v-/3vTY5-A36ZA.?ToN$TB0v3DZ/58N$5836Zv) Ä .?-/3UB3658NQRSLMZ=NQP".?\45@5A1B3DCFEHGI+@JUB3583v058.?-6m Ri58Z.?^"3v-8N58RS.QT N$Z¼3vLML NQZRM5AZ=3^36065A3vU ^"3v-I<>.?-AwxNQTB063vZRST581B3h$NQ-/RS.?\BZ=^41XZ/RS0vZ 021oNQTBT43vLSZn0 N$T P"3 <>.?\4TBU RMTµ¯ à m Á± ) χ2 / ndf. 13.54 / 23. LWidth 0.008234 ± 0.001379. 35. GSigma. 30 25. 0.06662 ± 0.00140. M1. 3.133 ± 0.001. Area1. 6716 ± 100.4. M2. 240 220. 9.571 / 43. LWidth. 0.03015 ± 0.00953. GSigma. 0.09726 ± 0.01149. M1. 200. Area1. 3.727 ± 0.016. 180. Area2. 189.1 ± 32.3. 160. Cbkg. 3.112e+04 ± 1938. 20. χ2 / ndf. 140 120. 9.529 ± 0.006 67.32 ± 3.98. M2. 10.09 ± 0.02. Area2. 18.64 ± 2.18. M3. 10.43 ± 0.03. Area3. 10.2 ± 1.9. Cbkg. 1872 ± 274.2. J/Ψ. all contributions. Ψ‘. -4. BG from open charm. 10. BG from open beauty -5. BG from misidentified π ‘s. 10. uncorr. BG (like sign). Υ. -6. 10. 100. 15. Entries/(Events*GeV/c2). Entries/50 MeV/10^6 s. 3. ×10. Υ‘. Υ‘‘. 80 10. 10-7. 60 40. 5. 20 0 2. 2.5. 3. 3.5. 4 4.5 5 2 Mµµ (GeV/c ). 0 8. -8. 10. 8.5. 9. 9.5. 10 10.5 11 11.5 2 Mµµ (GeV/c ). 0. 2. 4. 6. 8. 10 12 Invariant Mass [GeV]. p RM?\B-/3Vl4)¼G»TYh$NQ-ARSNQTY5nwNQZ/ZZA^"3v065A-8N.Q<LM.wN$ZAZUBRSw]\B.?TµªLM36<5Ó«Ómo1BRSQ1wxNQZ/Z UBRMw¬\B.?Tµª>wxRMUBUBLS3 «m NQT4UUBRM3vLS36065A-A.?T ª-/RS?1Y52«mY3^"3v0583vUx58.VP3w3 NQZ/\B-A36UxRM5A1u581B3nCFEHGI+@J°UB3583v058.?-fRM5A1BRSTNw.?TY581 .Q<¬(WPP"3 NQwZµª35A-8NQ0583vU¸<>-A.?w ¯ Á± «Ó)¾G»T¸581B3LS3<5 NQTBU¸wxRMUBUBLS3Æ^BLS.Q5AZvm'5A1B3%TB.?Tq0v.?-/-A3vLSN$5836U PoN$02Q-A.?\BT4URSZZA\BP45A-8NQ05836U#<>-A.?w58143 58.$52NQL,ZA^"3v058-/\Bw N$ZAZA\4wxRMTB¬NV^36-/<>3v05@Z/\BP458-ANQ065ARS.?TR);3Q)5A1B3 ZI52N$5ARSZ/5ARS0vNQLH3v-/-A.?-n.Q<5A1B3 I<>\BLSL ·ZA^"3v065A-A\BwRMZ N$ZAZARM?TB36U 58.581B3V-A36wN$RSTBRMTBuZA^"3v058-A\4w .Q<*581B3VZA\4w .Q<*581B3D06.?-A-/3vLON583vUZ/.?\B-A063vZ6) ¡ ¦ ÈB~ G»TµN$P.?\5F5».XQ3 NQ-/ZD<>-/.?w T4.DmH143 N hXqRS.?T06.?LSLMRSZARM.?TBZ N$5F5A1B3·E F+ RSLSLr\BTBU4.?\BP45A3vUBLiX´.?^"3vT N¬TB3 N$TBU\BTBRM[\433v-8N]<>.Q-¼581433^BLS.Q-8N$5ARS.?T#.$<H581B3VD+@© ^B1oN$ZA3UBRSNQ?-8N$w Ri581\BT4^B-A360v3vU43vTY5836U [\oNQLMRM58N$58Rih?3NQT4UÎ[\oN$T5ARM58N$58Rih?3YNQRMTBZ]<>.?-581B3ZI58\BU4X°.Q< 5A1B3DV( N$5uLSNQ-A?3x583vw^"3v-8N58\B-/3NQTBU Z/wNQLML PoNQ-/XQ.?TBRM0]021B36wxRM0 NQLr^.$583vTY5ARONQL¶)n²=143¬TB.h?36LM58RM3vZ PB-A.?\4?1Y5FPYX 5A1BRSZnTB3 36TB3v-/QX -A3vQRSw3]NQ-/3 RO«581B3 NQ0v063vZ/Z5A.ÈN´-A36?RSw3.Q<nh?36-/XZAwxNQLML=k /.?-/Q3vTq h$NQLM\B3vZ·021oN$-8NQ0583v-/RSÏ63vUPYXNZ8N58\B-AN$58RM.?T .Q<@LS.Ðw.?w3vTY58\Bw ?LS\B.QTBZvmrRSRO« 581B3LONQ-/?3u5836wx^"3v-AN$58\B-/3<>.Q-D14RS021µ5A1B3021oNQ-8N$065836-ARMZ/58RM0vZV.Q<@5A1B3 ZIXZI5836w ?350vLS.QZA3v-5A.Î5A1B.?ZA3%.Q<¬NQTRMUB3 N$LYNQZvm'RSRSRO«58143%Z/wN$LSLFPoN$-/X?.QTBRS0%021B3vwRS0vNQL^".Q5836T5ARONQL 1BRM021P"3v06.?wx36ZxZ/RSwRSLSNQ-V5A.%5A1oN$5.Q<n581B33 N$-ALMX°g TBRih?36-AZA3ÆNQTBUÎRMh4«58143ÆNQP4\BTBUoNQTY5x^B-A.UB\B058RM.?T -AN$583·.Q<1oNQ-/U^B-A.0v36ZAZA36Z1BRM0210 NQT%P3u\4ZA3vUymr<>.?- 581B3u®o-/Z/558RMwx3$mHNQZD1BRM?1´Z/58N$58RMZ/58RM0vZ^B-/.?P"3vZ.Q< 5A1B3¬w3vUBRM\Bw )=Cn<5836-'w.?-A3D581oN$T tXQ3 NQ-/ZF.Q<WRMTY583vT4ZARMhQ3¬UB3583v058.?-'` D©ÐN$TBU 0v.QTBZ/5A-A\B058RS.QTm5A1B3 C'E GI+@J3Ó^36-ARSw3vTY5nRSZ=06\B-A-/3vTY58LiXRSTRi58Z=RST4Z/52N$LSLON58RS.QT^B1oN$ZA3Q) z £ ¤ ¥ £ } G5RMZ·Nµ^BLM3 NQZ/\B-A358.µNQ02TB.LS36UB?3581B3.?-A?NQTBRSÏ63v-/Z.$<'58143 Z/021B..QL<>.Q-·5A1B3vRM-·RSTYhRM52N58RS.QTNQTBU <>.?-^4-A.hRSUBRMTBÎNhQ3v-IXKTBRS0633vTYhRS-A.QTBwx36TY5<>.?-Z/5ARSw¬\BLSN$58RMTB°UBRMZA06\BZAZ/RS.?TBZ6)G?-AN$583<>\BLSLiX581oNQT4 C)oC'TBUB-/.?TBRM0D<>.Q-=0 NQ-/36<>\BLMLMXx-A3 N$UBRSTBu5A1B3DwNQT\BZ/0v-/RS^45v).
(24) . . . .
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(27) C °ªd$t?t à « tYd #Su)C UB0v. T CFEUG*IKJ¯º(f'Jf_ G +.QLSLON$P.?-ANq 5ARS.?T ± mo_n\B0vL¶),(W1XZ6)"V C %ª¶dQt?t à « lB) C L ªdQtQt à « #=²)fEH\BUBLSNQwm¼_n\B0vL¶)f(W1XZ6)W C L ªd$t?t à « # ? )²)©¬)WEH363Qm@_n\B0vL¶)f(W1XZ6)¼W C L ª¶dQt?t à «e?t #J)a1\B-IXYNQ,m4_ \B06L)(W1YXZ6) Ä )4FX\BLON$ZAZ/XN$TBU#EW) Ä 0 EH36-A-8N$Tm4_n\B0vL¶)(W1XZ6)4X C L ª¶dQt?t à «s$l #k') Z X C L ªd$t?t à « l # ])ºq»_) NQTB4m_ \B06L)(W1YXZ6)C Ä \BY LMLS3v-6mY_ \40vL)?(f1YXZv)X L ª¶dQt?t à « #oV),a5 .QY 02Q3v-6m"_ \B06L),(W1YXZ6),[ C L ªdQt?t à « d #0 4)ºq»(*),kLSNQRSÏ6.Q5=N$TBUp),3vLSRMZvm _n\B0vL¶),(W1XZ6)"V C L ªd$t?t à « l ) dS) 1"""A&3!]\01^_&31"0$*&_ < &04,1+0'.2 ` /-3,4a@94%/- b_+c-d%e6fghio) e4j) 4)"a021\4-AN$<5 m"_n\B0vL¶),(f1YXZv),k C Ȫd$t?tYd?«=d ?Á ) lBl) u) DN ANQTY5ARS3QmB_ \B06L)o(W1YXZv)"[ C ª¶dQt?t?e?«lYeYd) à )C'EHGI+@J +.?LSLSNQP.Q-8N$5ARS.?Tm 4),(W1YXZv) L ªd$t?tQl« ÃÁ mo+@Jf`n_FbQE '+=+=b L L mnL o ) s4)C)oC'060 NQ-/UBR CFEG*IKJSmoN$- FRih"ÑË1B36^q»^41,bQt?e tYd Á lB) Á )C'EHGI+@J +.?LSLSNQP.Q-8N$5ARS.?Tm 4),(W1YXZv) ªd$t?t?sY« d Yà mo+@Jf`n_FbQE '+=+=b L L mnL L ).
(28)
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