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Measurement of exclusive γγ→l<sup>+</sup>l<sup>-</sup> production in proton-proton collisions at √s=7 TeV with the ATLAS detector

Aad, G.
•
Abbott, B.
•
Abdallah, J.
altro
Zwalinski, L.
2015
  • journal article

Periodico
PHYSICS LETTERS. SECTION B
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 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.
DOI
10.1016/j.physletb.2015.07.069
WOS
WOS:000361562900035
Archivio
http://hdl.handle.net/11390/1096092
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85040597160
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84940039416&partnerID=40&md5=3cf5548b2a3d6e49688e7f467f5a0311
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metadata only access
Soggetti
  • Nuclear and High Ener...

Scopus© citazioni
53
Data di acquisizione
Jun 15, 2022
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Web of Science© citazioni
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Data di acquisizione
Jan 18, 2024
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Data di acquisizione
Apr 19, 2024
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