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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/22152
Title: Direct Measurement of the W Production Charge Asymmetry in pp Collisions at root s=1.96 TeV
Authors: CDF Collaboration; Cabrera, Susana; Cuenca Almenar, Cristóbal; Álvarez González, B.; Casal, Bruno; Cuevas, Javier; Gómez, G.; Rodrigo, Teresa; Ruiz Jimeno, Alberto; Scodellaro, Luca; Vila, Iván; Vilar, Rocío; Aaltonen, T.
Issue Date: 8-May-2009
Publisher: American Physical Society
Citation: Physical Review Letters 102 (18): 181801 (2009)
Abstract: We present the first direct measurement of the W production charge asymmetry as a function of the W boson rapidity y(W) in pp collisions at root s=1.96 TeV. We use a sample of W -> e nu events in data from 1 fb(-1) of integrated luminosity collected using the CDF II detector. In the region |y(W)|< 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.
Publisher version (URL): http://dx.doi.org/10.1103/PhysRevLett.102.181801
URI: http://hdl.handle.net/10261/22152
DOI: 10.1103/PhysRevLett.102.181801
ISSN: 0031-9007
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