Measurement of differential cross sections and W+=W- cross-section ratios for W boson production in association with jets at √s = 8 TeV with the ATLAS detector
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Springer International Publishing
Materia
Hadron-Hadron scattering
Fecha
2018Referencia bibliográfica
Aguilar-Saavedra, J.A [et al.]. Measurement of differential cross sections and W+=W- cross-section ratios for W boson production in association with jets at √s = 8 TeV with the ATLAS detector. JHEP 05 (2018) 077. [https://doi.org/10.1007/JHEP05(2018)077]
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Article funded by SCOAP3.Resumen
This paper presents a measurement of the W boson production cross section
and the W+=W- cross-section ratio, both in association with jets, in proton-proton collisions
at √s= 8TeV with the ATLAS experiment at the Large Hadron Collider. The
measurement is performed in nal states containing one electron and missing transverse
momentum using data corresponding to an integrated luminosity of 20.2 fb-1. Differential
cross sections for events with at least one or two jets are presented for a range of
observables, including jet transverse momenta and rapidities, the scalar sum of transverse
momenta of the visible particles and the missing transverse momentum in the event, and
the transverse momentum of the W boson. For a subset of the observables, the differential
cross sections of positively and negatively charged W bosons are measured separately. In
the cross-section ratio of W+=W- the dominant systematic uncertainties cancel out, improving
the measurement precision by up to a factor of nine. The observables and ratios
selected for this paper provide valuable input for the up quark, down quark, and gluon
parton distribution functions of the proton.