Single-spin asymmetries with weak bosons at RHIC

Details Single-spin asymmetries with weak bosons at RHIC Single-spin asymmetries with weak bosons at RHIC

2003-04-01

arxiv.org/abs/hep-ph/0304002v1

Nucl.Phys.B666:31-55,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

38 pages, 17 figures; a version with high-resolution figures is available online at http://hep.pa.msu.edu/~nadolsky/RhicBos/

Scientific paper

10.1016/S0550-3213(03)00455-3

In order to measure spin-dependent parton distributions in production of weak bosons using the non-hermetic detectors of the Relativistic Heavy Ion Collider, an accurate model for distributions of charged leptons from the W boson decay is needed. We discuss the predictions for production and decay of the W bosons based on a calculation for resummation of large logarithmic contributions originating from multiple soft gluon radiation. We compare the predictions for the spin-dependent resummed cross sections with the corresponding next-to-leading order results. We show that the lepton-level asymmetries can be reliably predicted by the resummation calculation and directly compared to the experimental data. A program for the numerical analysis of such cross sections in $\gamma ^{*}, W^{\pm},$ and $Z^{0}$ boson production is also presented.

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