Direct Measurement of the W Production Charge Asymmetry in p(p)over-bar Collisions at root s = 1.96 TeV
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Aaltonen-2009-Direct Measurement o.pdf
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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
Date Issued
March 2009
Journal
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
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevLett.102.181801
