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Title

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

AuthorsCDF 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 Date8-May-2009
PublisherAmerican Physical Society
CitationPhysical Review Letters 102 (18): 181801 (2009)
AbstractWe 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
URIhttp://hdl.handle.net/10261/22152
DOI10.1103/PhysRevLett.102.181801
ISSN0031-9007
Appears in Collections:(IFIC) Artículos
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