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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. © 2015 CERN for the benefit of the ATLAS Collaboration.

Registro:

Documento: Artículo
Título:Measurement of exclusive γγ→ℓ + ℓ − production in proton–proton collisions at √s=7 TeV with the ATLAS detector
Autor:Aad, G. et al.
Este artículo contiene 2851 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 2851 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Año:2015
Volumen:749
Página de inicio:242
Página de fin:261
DOI: http://dx.doi.org/10.1016/j.physletb.2015.07.069
Título revista:Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Título revista abreviado:Phys Lett Sect B Nucl Elem Part High-Energy Phys
ISSN:03702693
CODEN:PYLBA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v749_n_p242_Aad

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Citas:

---------- APA ----------
(2015) . Measurement of exclusive γγ→ℓ + ℓ − production in proton–proton collisions at √s=7 TeV with the ATLAS detector. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 749, 242-261.
http://dx.doi.org/10.1016/j.physletb.2015.07.069
---------- CHICAGO ----------
Aad, G. "Measurement of exclusive γγ→ℓ + ℓ − production in proton–proton collisions at √s=7 TeV with the ATLAS detector" . Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 749 (2015) : 242-261.
http://dx.doi.org/10.1016/j.physletb.2015.07.069
---------- MLA ----------
Aad, G. "Measurement of exclusive γγ→ℓ + ℓ − production in proton–proton collisions at √s=7 TeV with the ATLAS detector" . Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 749, 2015, pp. 242-261.
http://dx.doi.org/10.1016/j.physletb.2015.07.069
---------- VANCOUVER ----------
Aad, G. Measurement of exclusive γγ→ℓ + ℓ − production in proton–proton collisions at √s=7 TeV with the ATLAS detector. Phys Lett Sect B Nucl Elem Part High-Energy Phys. 2015;749:242-261.
http://dx.doi.org/10.1016/j.physletb.2015.07.069