corner
corner

Phys. Rev. Lett. 102, 181801 (2009) [7 pages]

Direct Measurement of the W Production Charge Asymmetry in pp̅ Collisions at s=1.96  TeV

Download: PDF (181 kB) Buy this article Export: BibTeX or EndNote (RIS)

T. Aaltonen et al. CDF Collaboration
Show All Authors/Affiliations

Received 15 January 2009; published 6 May 2009

We present the first direct measurement of the W production charge asymmetry as a function of the W boson rapidity yW in pp̅ collisions at s=1.96  TeV. We use a sample of Weν events in data from 1  fb-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.

© 2009 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.181801
DOI:
10.1103/PhysRevLett.102.181801
PACS:
13.38.Be, 13.85.Qk, 14.60.Cd, 14.70.Fm