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Measurement of the transverse momentum and φη<inf>∗</inf> distributions of Drell–Yan lepton pairs in proton–proton collisions at √ s = 7 TeV with the ATLAS detector

Atlas, Collaboration
•
Aad, G.
•
Abbott, B.
altro
GIORDANI, Mario
2016
  • journal article

Periodico
THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS
Abstract
Distributions of transverse momentum p(T)(ll) and the related angular variable phi(eta)*. of Drell-Yan lepton pairs are measured in 20.3 fb(-1) of proton-proton collisions at root s = 8 TeV with the ATLAS detector at the LHC. Measurements in electron-pair and muon-pair final states are corrected for detector effects and combined. Compared to previous measurements in proton-proton collisions at root s = 7 TeV, these new measurements benefit from a larger data sample and improved control of systematic uncertainties. Measurements are performed in bins of lepton-pair mass above, around and below the Z-boson mass peak. The data are compared to predictions from perturbative and resummed QCD calculations. For values of phi(eta)*. < 1 the predictions from the Monte Carlo generator ResBos are generally consistent with the data within the theoretical uncertainties. However, at larger values of phi(eta)*. this is not the case. Monte Carlo generators based on the parton-shower approach are unable to describe the data over the full range of p(T)(ll) while the fixed-order prediction of Dynnlo falls below the data at high values of p(T)(ll). ResBos and the parton-shower Monte Carlo generators provide a much better description of the evolution of the phi(eta)*. and p(T)(ll) distributions as a function of lepton-pair mass and rapidity than the basic shape of the data.
DOI
10.1140/epjc/s10052-016-4070-4
WOS
WOS:000376679200002
Archivio
http://hdl.handle.net/11390/1097480
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84971574771
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84971574771&partnerID=40&md5=5d0eadce3c6075650196833870310648
Diritti
metadata only access
Scopus© citazioni
121
Data di acquisizione
Jun 14, 2022
Vedi dettagli
Web of Science© citazioni
135
Data di acquisizione
Mar 19, 2024
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