Single Longitudinal-Spin Asymmetries in Lepton-Pair Production at RHIC and J-PARC
High Energy Physics - Phenomenology
2009-09-17 v1
Abstract
We study the single longitudinal-spin asymmetries in lepton-pair production with large transverse-momentum at RHIC and J-PARC experiments. The asymmetries in the azimuthal angular distribution of a lepton can arise from an absorptive part of production amplitudes. We revisit the one-loop calculation for the absorptive part of production amplitudes in perturbative QCD, and show that the asymmetries can be sizable at RHIC and J-PARC. Measurement of the asymmetries would test the one-loop prediction for the scattering phase of this process, and provide support for a study of the single transverse-spin asymmetries in the same kinematical region.
Keywords
Cite
@article{arxiv.0705.2481,
title = {Single Longitudinal-Spin Asymmetries in Lepton-Pair Production at RHIC and J-PARC},
author = {Hiroshi Yokoya},
journal= {arXiv preprint arXiv:0705.2481},
year = {2009}
}
Comments
7 pages PTPTex, 4 figures