Direct Measurement of the W Production Charge Asymmetry in p(p)over-bar Collisions at root s = 1.96 TeV
- Paus, Christoph M. E.
- Gomez-Ceballos, Guillelmo
- Henderson, C.
- Choudalakis, Georgios
- Knuteson, Bruce O.
- Hahn, Kristian Allan
- Goncharov, Maxim
- Makhoul, K.
- Xie, Si
- Bauer, Gerry P.
Publication date
January 2009
DOI Publisher
American Physical Society (APS) Journal
Physical Review LettersAbstract
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
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