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Measurement of differential cross sections and W+/W- cross-section ratios for W boson production in association with jets at root s=8 TeV with the ATLAS detector
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.ORCID-id: 0000-0001-6945-1916
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.ORCID-id: 0000-0003-3867-0336
KTH.
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Rekke forfattare: 28642018 (engelsk)Inngår i: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, nr 5, artikkel-id 077Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

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 root s = 8 TeV with the ATLAS experiment at the Large Hadron Collider. The measurement is performed in final 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.

sted, utgiver, år, opplag, sider
Springer-Verlag New York, 2018. nr 5, artikkel-id 077
Emneord [en]
Hadron-Hadron scattering (experiments)
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-232503DOI: 10.1007/JHEP05(2018)077ISI: 000432561800001000432561800001Scopus ID: 2-s2.0-85047340875OAI: oai:DiVA.org:kth-232503DiVA, id: diva2:1234422
Merknad

QC 20180724

Tilgjengelig fra: 2018-07-24 Laget: 2018-07-24 Sist oppdatert: 2018-07-24bibliografisk kontrollert

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