HAL Id: in2p3-00013767
http://hal.in2p3.fr/in2p3-00013767
Submitted on 19 Jun 2003
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LEX results for VCS below threshold at JLab
H. Fonvieille
To cite this version:
Datasets and A nalysis m etho ds
analysis based on the LET (P.Guichon et al.)
VCS Structure functions Pll-Ptt/epsilon at a given Q2 and epsilon
analysis based on DR Model (B.Pasquini et al.)
Pll, Ptt, Plt structure funct. at a given Q2
parameters
,
Λ
βΛ
α and Plt Pll-Ptt/epsilon and PltF o rmalis m
A
t
the
a
mplitude
level:
γ pe
Bethe-Heitler (BH) VCS Non-Born Termcontains Generalized
Polarizabilities
V C S K inemat ic s
e
e’
γ
p
φ
θ
cmq
cmq’
cm center-of-mass :γ
p
In (γp ) center -o f-m a ss: in stea d o f C M a ng le s, p o la r θγγCM and a zimuthal φγγCM , w e us e longitude angle θIN P and latitude angle θOOP :e
e’
40 deg. latitude angle in-plane = 90 deg. latitude angle
(virtual photon)
q
cm
(outgoing photon)
90 deg. longitude angle
0 deg. longitude angle