UZH-Logo

QCD corrections to longitudinal spin asymmetries in W±-boson production at RHIC


von Arx, C; Gehrmann, T (2011). QCD corrections to longitudinal spin asymmetries in W±-boson production at RHIC. Physics Letters B, 700(1):49-54.

Abstract

The polarized antiquark distributions in the proton can be measured by studying spin asymmetries in vector boson production in longitudinally polarized proton–proton collisions. The STAR and PHENIX experiments at BNL RHIC have reported first observations of single spin asymmetries in W± production most recently. We compute the QCD corrections to single and double spin asymmetries, taking account of the leptonic decay of the W± boson and of restrictions on the kinematical acceptance of the detectors. The QCD corrections have only a small impact on the asymmetries, such that a reliable extraction of the polarized antiquark distributions can be envisaged once more precise measurements are made.

The polarized antiquark distributions in the proton can be measured by studying spin asymmetries in vector boson production in longitudinally polarized proton–proton collisions. The STAR and PHENIX experiments at BNL RHIC have reported first observations of single spin asymmetries in W± production most recently. We compute the QCD corrections to single and double spin asymmetries, taking account of the leptonic decay of the W± boson and of restrictions on the kinematical acceptance of the detectors. The QCD corrections have only a small impact on the asymmetries, such that a reliable extraction of the polarized antiquark distributions can be envisaged once more precise measurements are made.

Citations

2 citations in Web of Science®
2 citations in Scopus®
Google Scholar™

Altmetrics

Downloads

118 downloads since deposited on 19 Feb 2012
30 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:May 2011
Deposited On:19 Feb 2012 17:27
Last Modified:05 Apr 2016 14:55
Publisher:Elsevier
ISSN:0370-2693 (P) 1873-2445 (E)
Publisher DOI:10.1016/j.physletb.2011.04.062
Related URLs:http://arxiv.org/abs/1103.1465
Permanent URL: http://doi.org/10.5167/uzh-48223

Download

[img]
Preview
Content: Accepted Version
Filetype: PDF (Version 2)
Size: 134kB
View at publisher
[img]
Preview
Content: Accepted Version
Filetype: PDF (Version 1)
Size: 133kB

TrendTerms

TrendTerms displays relevant terms of the abstract of this publication and related documents on a map. The terms and their relations were extracted from ZORA using word statistics. Their timelines are taken from ZORA as well. The bubble size of a term is proportional to the number of documents where the term occurs. Red, orange, yellow and green colors are used for terms that occur in the current document; red indicates high interlinkedness of a term with other terms, orange, yellow and green decreasing interlinkedness. Blue is used for terms that have a relation with the terms in this document, but occur in other documents.
You can navigate and zoom the map. Mouse-hovering a term displays its timeline, clicking it yields the associated documents.

Author Collaborations