Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-06-15
Phys.Lett.B700:11-16,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages
Scientific paper
10.1016/j.physletb.2011.04.042
We study parity-even and parity-odd polarization observables for the process $p \, p \to l^{\pm} \, X$, where the lepton comes from the decay of a $W$-boson. By using the collinear twist-3 factorization approach, we consider the case when one proton is transversely polarized, while the other is either unpolarized or longitudinally polarized. These observables give access to two particular quark-gluon-quark correlation functions, which have a direct relation to transverse momentum dependent parton distributions. We present numerical estimates for RHIC kinematics. Measuring, for instance, the parity-even transverse single spin correlation would provide a crucial test of our current understanding of single spin asymmetries in the framework of QCD.
Metz Andreas
Zhou Jiajia
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