Direct Measurement of the W Production Charge Asymmetry in p(p)over-bar Collisions at root s = 1.96 TeV
Author(s)
Paus, Christoph M. E.; Gomez-Ceballos, Guillelmo; Henderson, C.; Choudalakis, Georgios; Knuteson, Bruce O.; Hahn, Kristian Allan; Goncharov, Maxim; Xie, Si; Makhoul, Khaldoun; Bauer, Gerry P; ... Show more Show less
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We present the first direct measurement of the W production charge asymmetry as a function of the W boson rapidity yW in p(p)over-bar collisions at √s=1.96 TeV. We use a sample of W→eν events in data from 1 fb[superscript -1] of integrated luminosity collected using the CDF II detector. In the region |yW|<3.0, this measurement is capable of constraining the ratio of up- and down-quark momentum distributions in the proton more directly than in previous measurements of the asymmetry that are functions of the charged-lepton pseudorapidity.
Date issued
2009-03Department
Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaltonen, T. et al. “Direct Measurement of the W Production Charge Asymmetry in pp-bar Collisions at s=1.96 TeV.” Physical Review Letters 102.18 (2009): 181801. (C)2010 The American Physical Society.
Version: Final published version
ISSN
0031-9007