Transverse spin asymmetries for W-production in proton-proton collisions

Abstract

We study parity-even and parity-odd polarization observables for the process $pp\to l^{\pm }X$, 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.

10 pages

References in corpus (23)

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Cited by in corpus (2)

• Probing the three-gluon correlation functions by the single spin asymmetry in p^\uparrow p\to DX
• Double Sivers effect asymmetries and their impact on transversity measurements at RHIC