UNIGE document Scientific Article
previous document  unige:84170  next document
add to browser collection
Title

Measurement of the transverse momentum and ϕη∗ distributions of Drell–Yan lepton pairs in proton–proton collisions at √s = 8 TeV with the ATLAS detector

CollaborationWith : Ancu, Lucian Stefan / Bell, William / Benhar Noccioli, Eleonora / Bilbao De Mendizabal, Javier / Calace, Noemi / Clark, Allan Geoffrey / Coccaro, Andrea / Delitzsch, Chris Malena / Della Volpe, Domenico / Ferrere, Didier / Gadomski, Szymon / Golling, Tobias / Gonzalez Sevilla, Sergio / Gramling, Johanna Léna / Guescini, Francesco / Iacobucci, Giuseppe / Katre, Akshay / Mermod, Philippe / Miucci, Antonio / Muenstermann, Daniel / Nackenhorst, Olaf / Paolozzi, Lorenzo / Picazio, Attilio / Ristic, Branislav / Schramm, Steven / Tykhonov, Andrii / Vallecorsa, Sofia / Wu, Xin
Published in European Physical Journal. C. 2016, vol. 76, no. 5, p. 291
Collection Open Access - SCOAP3
Abstract Distributions of transverse momentum pTℓℓ and the related angular variable ϕη∗ of DrellΓÇôYan lepton pairs are measured in 20.3┬áfb -1 of protonΓÇôproton collisions at s=8 ┬áTeV 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 protonΓÇôproton collisions at s=7 ┬áTeV, 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 ϕη∗<1 the predictions from the Monte Carlo generator ResBos are generally consistent with the data within the theoretical uncertainties. However, at larger values of ϕη∗ 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 pTℓℓ while the fixed-order prediction of Dynnlo falls below the data at high values of pTℓℓ . ResBos and the parton-shower Monte Carlo generators provide a much better description of the evolution of the ϕη∗ and pTℓℓ distributions as a function of lepton-pair mass and rapidity than the basic shape of the data.
Identifiers
Full text
Structures
Citation
(ISO format)
ATLAS COLLABORATION. Measurement of the transverse momentum and ϕη∗ distributions of Drell–Yan lepton pairs in proton–proton collisions at √s = 8 TeV with the ATLAS detector. In: European Physical Journal. C, 2016, vol. 76, n° 5, p. 291. https://archive-ouverte.unige.ch/unige:84170

121 hits

26 downloads

Update

Deposited on : 2016-06-03

Export document
Format :
Citation style :