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Open Access item 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, 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
Appears in Collections:(IFIC) Artículos

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