Publications
Publication Information
| Title | Lepton Angular Distributions of Fixed-target Drell-Yan Experiments in Perturbative QCD and a Geometric Approach |
| Authors | W. Chang, Randall Mcclellan, Jen-chieh Peng, Oleg Teryaev |
| JLAB number | JLAB-PHY-18-2873 |
| LANL number | arXiv:1811.03256 |
| Other number | DOE/OR/23177-4586 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
| Other Funding: | U.S. National Science Foundation Ministry of Science and Technology of Taiwan |
|
Journal Compiled for Physical Review D Volume 99 Page(s) 014032 Refereed | |
| Publication Abstract: | The lepton angular distributions of the Drell-Yan process in fixed-target experiments are investigated by NLO and NNLO perturbative QCD. We present the calculated angular parameters lambda, mu, upsilon and the degree of violation of Lam-Tung relation, 1 - lambda - 2upsilon, for the NA10, E615 and E866 experiments. Predictions for the ongoing COMPASS and SeaQuest experiments are also presented. The transverse momentum (qT) distributions of lambda and upsilon show a clear dependence on the dimuon mass (Q) while those of mu have a strong rapidity (xF) dependence. Furthermore, lambda and upsilon are found to scale with qT/Q. These salient features could be qualitatively understood by a geometric approach where the lepton angular distribution parameters are expressed in terms of the polar and azimuthal angles of the 'natural axis' in the dilepton rest frame. |
| Experiment Numbers: | other |
| Group: | Hall A |
| Document: | |
| DOI: | https://doi.org/10.1103/PhysRevD.99.014032 |
| Accepted Manuscript: | PhysRevD.99.014032.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |