Measurement of exclusive γγ→l+l− production in proton–proton collisions at √s=7 TeV with the ATLAS detector

ATLAS Collaboration

doi:10.1016/j.physletb.2015.07.069

Measurement of exclusive γγ→l⁺l⁻ production in proton–proton collisions at √s=7 TeV with the ATLAS detector

ATLAS Collaboration

Aix-Marseille Université and CNRS/IN2P3
Homer L. Dodge Department of Physics and Astronomy
University of Oklahoma
Academia Sinica - Institute of Physics
Azerbaijan National Academy of Sciences
University of Amsterdam
Department of Physics and Astronomy
Michigan State University
Department of Physics
University of Toronto
Raymond and Beverly Sackler School of Physics and Astronomy
Tel Aviv University
Department of Physics
Technion-Israel Institute of Technology
Center for High Energy Physics
University of Oregon
Department of Physics
Stockholm University
The Oskar Klein Centre
INFN Gruppo Collegato di Udine
National Institute for Nuclear Physics
Abdus Salam International Centre for Theoretical Physics
Department of Physics
King's College London
Faculty of Physics and Applied Computer Science
AGH University of Krakow
Physics Department
Brookhaven National Laboratory
Department of Physics
Northern Illinois University
Fakultät für Physik
Ludwig Maximilian University of Munich
Didcot
Oliver Lodge Laboratory
University of Liverpool
Institute of Physics
University of Belgrade
II Physikalisches Institut
University of Göttingen
Laboratório de Instrumentação e Física Experimental de Partículas
Departamento de Fisica Teorica y Del Cosmos
University of Granada
Dep Fisica
NOVA University Lisbon
Boston University
Joint Institute for Nuclear Research
Dipartimento di Fisica
University of Rome Tor Vergata
Fysiska institutionen
Lund University
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Dipartimento di Fisica e Astronomia
University of Bologna
Department of Physics and Astronomy
University of Victoria BC
Université Grenoble Alpes
Instituto de Física La Plata
CERN
Horia Hulubei National Institute of Physics and Nuclear Engineering
Physics Department
National Technical University of Athens
The University of Chicago
Nevis Laboratory
Columbia University
Department of Physics and Astronomy
University of Sussex
Dipartimento di Fisica
University of Naples Federico II
University of Copenhagen
School of Physics and Astronomy
Queen Mary University of London
Kobe University

Research output: Contribution to journal › Article › peer-review

75 Scopus citations

Abstract

This Letter reports a measurement of the exclusive γγ→ℓ⁺ℓ⁻ (ℓ=e, μ) cross-section in proton–proton collisions at a centre-of-mass energy of 7 TeV by the ATLAS experiment at the LHC, based on an integrated luminosity of 4.6 fb⁻¹. For the electron or muon pairs satisfying exclusive selection criteria, a fit to the dilepton acoplanarity distribution is used to extract the fiducial cross-sections. The cross-section in the electron channel is determined to be σ_{γγ→e⁺e⁻} ^excl.=0.428 ± 0.035 (stat.) ± 0.018 (syst.) pb for a phase–space region with invariant mass of the electron pairs greater than 24 GeV, in which both electrons have transverse momentum p_T>12 GeV and pseudorapidity |η|<2.4. For muon pairs with invariant mass greater than 20 GeV, muon transverse momentum p_T>10 GeV and pseudorapidity |η|<2.4, the cross-section is determined to be σ_{γγ→μ⁺μ⁻} ^excl.=0.628 ± 0.032 (stat.) ± 0.021 (syst.) pb. When proton absorptive effects due to the finite size of the proton are taken into account in the theory calculation, the measured cross-sections are found to be consistent with the theory prediction.

Original language	English
Pages (from-to)	242-261
Number of pages	20
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	749
DOIs	https://doi.org/10.1016/j.physletb.2015.07.069
State	Published - 7 Oct 2015
Externally published	Yes

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10.1016/j.physletb.2015.07.069

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@article{7dd1b7d6aafe49e787ddf5a9e423a265,

title = "Measurement of exclusive γγ→l+l− production in proton{\textendash}proton collisions at √s=7 TeV with the ATLAS detector",

abstract = "This Letter reports a measurement of the exclusive γγ→ℓ+ℓ− (ℓ=e, μ) cross-section in proton{\textendash}proton collisions at a centre-of-mass energy of 7 TeV by the ATLAS experiment at the LHC, based on an integrated luminosity of 4.6 fb−1. For the electron or muon pairs satisfying exclusive selection criteria, a fit to the dilepton acoplanarity distribution is used to extract the fiducial cross-sections. The cross-section in the electron channel is determined to be σγγ→e+e− excl.=0.428 ± 0.035 (stat.) ± 0.018 (syst.) pb for a phase{\textendash}space region with invariant mass of the electron pairs greater than 24 GeV, in which both electrons have transverse momentum pT>12 GeV and pseudorapidity |η|<2.4. For muon pairs with invariant mass greater than 20 GeV, muon transverse momentum pT>10 GeV and pseudorapidity |η|<2.4, the cross-section is determined to be σγγ→μ+μ− excl.=0.628 ± 0.032 (stat.) ± 0.021 (syst.) pb. When proton absorptive effects due to the finite size of the proton are taken into account in the theory calculation, the measured cross-sections are found to be consistent with the theory prediction.",

author = "\{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 L. Yuan",

note = "Publisher Copyright: {\textcopyright} 2015 CERN for the benefit of the ATLAS Collaboration.",

year = "2015",

month = oct,

day = "7",

doi = "10.1016/j.physletb.2015.07.069",

language = "英语",

volume = "749",

pages = "242--261",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Measurement of exclusive γγ→l+l− production in proton–proton collisions at √s=7 TeV with the ATLAS detector

AU - 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 - Yuan, L.

PY - 2015/10/7

Y1 - 2015/10/7

N2 - This Letter reports a measurement of the exclusive γγ→ℓ+ℓ− (ℓ=e, μ) cross-section in proton–proton collisions at a centre-of-mass energy of 7 TeV by the ATLAS experiment at the LHC, based on an integrated luminosity of 4.6 fb−1. For the electron or muon pairs satisfying exclusive selection criteria, a fit to the dilepton acoplanarity distribution is used to extract the fiducial cross-sections. The cross-section in the electron channel is determined to be σγγ→e+e− excl.=0.428 ± 0.035 (stat.) ± 0.018 (syst.) pb for a phase–space region with invariant mass of the electron pairs greater than 24 GeV, in which both electrons have transverse momentum pT>12 GeV and pseudorapidity |η|<2.4. For muon pairs with invariant mass greater than 20 GeV, muon transverse momentum pT>10 GeV and pseudorapidity |η|<2.4, the cross-section is determined to be σγγ→μ+μ− excl.=0.628 ± 0.032 (stat.) ± 0.021 (syst.) pb. When proton absorptive effects due to the finite size of the proton are taken into account in the theory calculation, the measured cross-sections are found to be consistent with the theory prediction.

AB - This Letter reports a measurement of the exclusive γγ→ℓ+ℓ− (ℓ=e, μ) cross-section in proton–proton collisions at a centre-of-mass energy of 7 TeV by the ATLAS experiment at the LHC, based on an integrated luminosity of 4.6 fb−1. For the electron or muon pairs satisfying exclusive selection criteria, a fit to the dilepton acoplanarity distribution is used to extract the fiducial cross-sections. The cross-section in the electron channel is determined to be σγγ→e+e− excl.=0.428 ± 0.035 (stat.) ± 0.018 (syst.) pb for a phase–space region with invariant mass of the electron pairs greater than 24 GeV, in which both electrons have transverse momentum pT>12 GeV and pseudorapidity |η|<2.4. For muon pairs with invariant mass greater than 20 GeV, muon transverse momentum pT>10 GeV and pseudorapidity |η|<2.4, the cross-section is determined to be σγγ→μ+μ− excl.=0.628 ± 0.032 (stat.) ± 0.021 (syst.) pb. When proton absorptive effects due to the finite size of the proton are taken into account in the theory calculation, the measured cross-sections are found to be consistent with the theory prediction.

UR - https://www.scopus.com/pages/publications/85040597160

U2 - 10.1016/j.physletb.2015.07.069

DO - 10.1016/j.physletb.2015.07.069

M3 - 文章

AN - SCOPUS:85040597160

SN - 0370-2693

VL - 749

SP - 242

EP - 261

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

Measurement of exclusive γγ→l⁺l⁻ production in proton–proton collisions at √s=7 TeV with the ATLAS detector

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