Measurement of the W charge asymmetry in the W → μν decay mode in pp collisions at √s = 7 TeV with the ATLAS detector

This Letter reports a measurement of the muon charge asymmetry from W bosons produced in proton– proton collisions at a centre-of-mass energy of 7 TeV with the ATLAS experiment at the LHC. The asymmetry is measured in the W → μν decay mode as a function of the muon pseudorapidity using a data sample...

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Detalles Bibliográficos
Autores principales: Anduaga, Xabier Sebastián, Monticelli, Fernando Gabriel, Dova, María Teresa, Tripiana, Martín Fernando, The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2011
Materias:
Física
W production
Charge asymmetry
Parton distribution function
Muon decay mode
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/77461
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
Descripción
Sumario:This Letter reports a measurement of the muon charge asymmetry from W bosons produced in proton– proton collisions at a centre-of-mass energy of 7 TeV with the ATLAS experiment at the LHC. The asymmetry is measured in the W → μν decay mode as a function of the muon pseudorapidity using a data sample corresponding to a total integrated luminosity of 31 pb−1. The results are compared to predictions based on next-to-leading order calculations with various parton distribution functions. This measurement provides information on the u and d quark momentum fractions in the proton.

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