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

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 crite...

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Autores principales: Alconada Verzini, María Josefina, Alonso, Francisco, Arduh, Francisco Anuar, Dova, María Teresa, Monticelli, Fernando Gabriel, Wahlberg, Hernán Pablo, The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Exactas
Física
Measurement
Physics
proton-proton collisions
electron
muon
pseudorapidity
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/125521
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-125521
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
Measurement
Physics
proton-proton collisions
electron
muon
pseudorapidity
spellingShingle Ciencias Exactas
Física
Measurement
Physics
proton-proton collisions
electron
muon
pseudorapidity
Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
Measurement of exclusive γγ → ℓ⁺ℓ⁻ production in proton-proton collisions at √s = 7 TeV with the ATLAS detector
topic_facet Ciencias Exactas
Física
Measurement
Physics
proton-proton collisions
electron
muon
pseudorapidity
description 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<sup>excl.</sup><sub>γγ → e⁺e⁻</sub> = 0.428 ± 0.035 (stat.) ± 0.018 (syst.) pb for a phase-space region with invariant mass of the electron pairs greater than 24GeV, in which both electrons have transverse momentum p<sub>T</sub> > 12 GeV and pseudorapidity |η| < 2.4. For muon pairs with invariant mass greater than 20 GeV, muon transverse momentum p<sub>T</sub> > 10 GeV and pseudorapidity |η| < 2.4, the cross-section is determined to be σ<sup>excl.</sup><sub>γγ → μ⁺μ⁻</sub> = 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.
format Articulo
Articulo
author Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_facet Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_sort Alconada Verzini, María Josefina
title Measurement of exclusive γγ → ℓ⁺ℓ⁻ production in proton-proton collisions at √s = 7 TeV with the ATLAS detector
title_short Measurement of exclusive γγ → ℓ⁺ℓ⁻ production in proton-proton collisions at √s = 7 TeV with the ATLAS detector
title_full Measurement of exclusive γγ → ℓ⁺ℓ⁻ production in proton-proton collisions at √s = 7 TeV with the ATLAS detector
title_fullStr Measurement of exclusive γγ → ℓ⁺ℓ⁻ production in proton-proton collisions at √s = 7 TeV with the ATLAS detector
title_full_unstemmed Measurement of exclusive γγ → ℓ⁺ℓ⁻ production in proton-proton collisions at √s = 7 TeV with the ATLAS detector
title_sort measurement of exclusive γγ → ℓ⁺ℓ⁻ production in proton-proton collisions at √s = 7 tev with the atlas detector
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/125521
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