ATLAS, Collaboration; Beck, Hans Peter; Cervelli, Alberto; Ereditato, Antonio; Haug, Sigve; Kabana, Sonja; Meloni, Federico; Mullier, Geoffrey André Adrien; Pretzl, Klaus-Peter; Stramaglia, Maria Elena; Stucci, Stefania; Weber, Michael (2015). Measurement of exclusive γγ→ℓ + ℓ − production in proton-proton collisions at √s=7 TeV with the ATLAS detector. Physics letters. B, 749, pp. 242-261. Elsevier 10.1016/j.physletb.2015.07.069
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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 excl. γγ→e + e − =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 excl. γγ→μ + μ − =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.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) 08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP) |
UniBE Contributor: |
Beck, Hans Peter, Cervelli, Alberto, Ereditato, Antonio, Haug, Sigve, Meloni, Federico, Mullier, Geoffrey André Adrien, Pretzl, Klaus-Peter, Stramaglia, Maria Elena, Stucci, Stefania, Weber, Michele |
Subjects: |
500 Science > 530 Physics |
ISSN: |
0370-2693 |
Publisher: |
Elsevier |
Language: |
English |
Submitter: |
Annette Krebs-Wegenast |
Date Deposited: |
08 Sep 2016 12:12 |
Last Modified: |
05 Dec 2022 14:58 |
Publisher DOI: |
10.1016/j.physletb.2015.07.069 |
ArXiv ID: |
1506.07098 |
Additional Information: |
Kollaboration - Es sind nur die Berner Autoren namentlich erwähnt |
BORIS DOI: |
10.7892/boris.87609 |
URI: |
https://boris.unibe.ch/id/eprint/87609 |
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