Weak effects in proton beam asymmetries at polarised RHIC and beyond
| dc.creator | Moretti, S. | |
| dc.creator | Nolten, M. R. | |
| dc.creator | Ross, D. A. | |
| dc.date | 2005-09-23 | |
| dc.date | 2006-06-20 | |
| dc.date.accessioned | 2026-07-07T10:29:42Z | |
| dc.date.available | 2026-07-07T10:29:42Z | |
| dc.description | We report on a calculation of the full one-loop weak corrections through the order $α_{\mathrm{S}}^2α_{\mathrm{W}}$ to parton-parton scattering in all possible channels at the Relativistic Heavy Ion Collider (RHIC) running with polarised $pp$ beams (RHIC-Spin). This study extends the analysis previously carried out for the case of $2\to2$ subprocesses with two external gluons, by including all possible four-quark modes with and without an external gluon. The additional contributions due to the new four-quarks processes are extremely large, of order 50 to 100% (of either sign), not only in the case of parity-violating beam asymmetries but also for the parity-conserving ones and (although to a more limited extent) the total cross section. Such ${\cal O}(α_{\mathrm{S}}^2α_{\mathrm{W}})$ effects on the CP-violating observables would be an astounding 5 times larger for the case of the LHC with polarised beams -- which has been discussed as one of the possible upgrades of the CERN machine -- whereas they would be much reduced for the case of the CP-conserving ones as well as the cross section. | |
| dc.description | 12 pages, 4 figures, 2 tables, minor modifications, version to appear in PLB | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0509254 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0509254 | |
| dc.identifier | Phys.Lett.B643:86-92,2006 | |
| dc.identifier | doi:10.1016/j.physletb.2006.06.084 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/177898 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Weak effects in proton beam asymmetries at polarised RHIC and beyond | |
| dc.type | text |