TY - GEN
T1 - Quark helicity flip and the transverse spin dependence of inclusive dis
AU - Afanasev, A.
AU - Strikman, M.
AU - Weiss, C.
PY - 2008
Y1 - 2008
N2 - Inclusive DIS with unpolarized beam exhibits a subtle dependence on the trans- verse target spin, arising from the interference of one{photon and two{photon exchange amplitudes in the cross section. We argue that this observable probes mainly the quark helicityflip amplitudes induced by the non-perturbative vacuum structure of QCD (spontaneous chiral symmetry breaking). This conjecture is based on (a) the absence of significant Sudakov suppression of the helicityflip process if soft gluon emission in the quark subprocess is limited by the chiral symmetry breaking scale μ2 chiral ≫ ∧2 QCD; (b) the expectation that the quark helicity-conserving twist{3 contribution is small. The normal target spin asymmetry is estimated to be of the order 10-4 in the kinematics of the planned Jefferson Lab Hall A experiment.
AB - Inclusive DIS with unpolarized beam exhibits a subtle dependence on the trans- verse target spin, arising from the interference of one{photon and two{photon exchange amplitudes in the cross section. We argue that this observable probes mainly the quark helicityflip amplitudes induced by the non-perturbative vacuum structure of QCD (spontaneous chiral symmetry breaking). This conjecture is based on (a) the absence of significant Sudakov suppression of the helicityflip process if soft gluon emission in the quark subprocess is limited by the chiral symmetry breaking scale μ2 chiral ≫ ∧2 QCD; (b) the expectation that the quark helicity-conserving twist{3 contribution is small. The normal target spin asymmetry is estimated to be of the order 10-4 in the kinematics of the planned Jefferson Lab Hall A experiment.
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U2 - 10.1142/9789812796950_0019
DO - 10.1142/9789812796950_0019
M3 - Conference contribution
AN - SCOPUS:84885579548
SN - 9812796940
SN - 9789812796943
T3 - Exclusive Reactions at High Momentum Transfer - Proceedings of the International Workshop
SP - 173
EP - 180
BT - Exclusive Reactions at High Momentum Transfer - Proceedings of the International Workshop
PB - World Scientific Publishing Co. Pte Ltd
T2 - 2007 International Workshop on Exclusive Reactions at High Momentum Transfer
Y2 - 21 May 2007 through 24 May 2007
ER -