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

The ATLAS collaboration

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Abstract

Distributions of transverse momentum pT ℓℓ and the related angular variable ϕη of Drell–Yan lepton pairs are measured in 20.3fb-1 of proton–proton collisions at √ 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 √ 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 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 pT ℓℓ while the fixed-order prediction of Dynnlo falls below the data at high values of pT ℓℓ. ResBos and the parton-shower Monte Carlo generators provide a much better description of the evolution of the ϕη and pT ℓℓ distributions as a function of lepton-pair mass and rapidity than the basic shape of the data.

Original languageEnglish
Article number291
JournalEuropean Physical Journal C
Volume76
Issue number5
DOIs
Publication statusPublished - May 23 2016

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transverse momentum
leptons
Momentum
Detectors
collisions
generators
detectors
showers
partons
predictions
Bosons
Bins
muons
bosons
quantum chromodynamics
Electrons
electrons
Uncertainty

All Science Journal Classification (ASJC) codes

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

Cite this

@article{0eb21f5754794fbfb664b7811ea58d1c,
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",
abstract = "Distributions of transverse momentum pT ℓℓ and the related angular variable ϕη∗ of Drell–Yan lepton pairs are measured in 20.3fb-1 of proton–proton collisions at √ 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 √ 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 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 pT ℓℓ while the fixed-order prediction of Dynnlo falls below the data at high values of pT ℓℓ. ResBos and the parton-shower Monte Carlo generators provide a much better description of the evolution of the ϕη∗ and pT ℓℓ distributions as a function of lepton-pair mass and rapidity than the basic shape of the data.",
author = "{The ATLAS collaboration} and G. Aad and B. Abbott and J. Abdallah and O. Abdinov and R. Aben and M. Abolins and AbouZeid, {O. S.} and H. Abramowicz and H. Abreu and R. Abreu and Y. Abulaiti and Acharya, {B. S.} and L. Adamczyk and Adams, {D. L.} and J. Adelman and S. Adomeit and T. Adye and Affolder, {A. A.} and T. Agatonovic-Jovin and J. Agricola and Aguilar-Saavedra, {J. A.} and Ahlen, {S. P.} and F. Ahmadov and G. Aielli and H. Akerstedt and {\AA}kesson, {T. P.A.} and Akimov, {A. V.} and Alberghi, {G. L.} and J. Albert and S. Albrand and {Alconada Verzini}, {M. J.} and M. Aleksa and Aleksandrov, {I. N.} and C. Alexa and G. Alexander and T. Alexopoulos and M. Alhroob and G. Alimonti and L. Alio and J. Alison and Alkire, {S. P.} and Allbrooke, {B. M.M.} and Allport, {P. P.} and A. Aloisio and A. Alonso and F. Alonso and C. Alpigiani and A. Altheimer and {Alvarez Gonzalez}, B. and {{\'A}lvarez Piqueras}, D.",
year = "2016",
month = "5",
day = "23",
doi = "10.1140/epjc/s10052-016-4070-4",
language = "English",
volume = "76",
journal = "European Physical Journal C",
issn = "1434-6044",
publisher = "Springer New York",
number = "5",

}

TY - JOUR

T1 - 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

AU - The ATLAS collaboration

AU - Aad, G.

AU - Abbott, B.

AU - Abdallah, J.

AU - Abdinov, O.

AU - Aben, R.

AU - Abolins, M.

AU - AbouZeid, O. S.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abreu, R.

AU - Abulaiti, Y.

AU - Acharya, B. S.

AU - Adamczyk, L.

AU - Adams, D. L.

AU - Adelman, J.

AU - Adomeit, S.

AU - Adye, T.

AU - Affolder, A. A.

AU - Agatonovic-Jovin, T.

AU - Agricola, J.

AU - Aguilar-Saavedra, J. A.

AU - Ahlen, S. P.

AU - Ahmadov, F.

AU - Aielli, G.

AU - Akerstedt, H.

AU - Åkesson, T. P.A.

AU - Akimov, A. V.

AU - Alberghi, G. L.

AU - Albert, J.

AU - Albrand, S.

AU - Alconada Verzini, M. J.

AU - Aleksa, M.

AU - Aleksandrov, I. N.

AU - Alexa, C.

AU - Alexander, G.

AU - Alexopoulos, T.

AU - Alhroob, M.

AU - Alimonti, G.

AU - Alio, L.

AU - Alison, J.

AU - Alkire, S. P.

AU - Allbrooke, B. M.M.

AU - Allport, P. P.

AU - Aloisio, A.

AU - Alonso, A.

AU - Alonso, F.

AU - Alpigiani, C.

AU - Altheimer, A.

AU - Alvarez Gonzalez, B.

AU - Álvarez Piqueras, D.

PY - 2016/5/23

Y1 - 2016/5/23

N2 - Distributions of transverse momentum pT ℓℓ and the related angular variable ϕη∗ of Drell–Yan lepton pairs are measured in 20.3fb-1 of proton–proton collisions at √ 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 √ 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 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 pT ℓℓ while the fixed-order prediction of Dynnlo falls below the data at high values of pT ℓℓ. ResBos and the parton-shower Monte Carlo generators provide a much better description of the evolution of the ϕη∗ and pT ℓℓ distributions as a function of lepton-pair mass and rapidity than the basic shape of the data.

AB - Distributions of transverse momentum pT ℓℓ and the related angular variable ϕη∗ of Drell–Yan lepton pairs are measured in 20.3fb-1 of proton–proton collisions at √ 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 √ 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 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 pT ℓℓ while the fixed-order prediction of Dynnlo falls below the data at high values of pT ℓℓ. ResBos and the parton-shower Monte Carlo generators provide a much better description of the evolution of the ϕη∗ and pT ℓℓ distributions as a function of lepton-pair mass and rapidity than the basic shape of the data.

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UR - http://www.scopus.com/inward/citedby.url?scp=84971574771&partnerID=8YFLogxK

U2 - 10.1140/epjc/s10052-016-4070-4

DO - 10.1140/epjc/s10052-016-4070-4

M3 - Article

AN - SCOPUS:84971574771

VL - 76

JO - European Physical Journal C

JF - European Physical Journal C

SN - 1434-6044

IS - 5

M1 - 291

ER -