Measurement of isolated-photon pair production in pp collisions at √s = 7 TeV with the ATLAS detector

The ATLAS experiment at the LHC has measured the production cross section of events with two isolated photons in the final state, in proton-proton collisions at √s = 7TeV. The full data set collected in 2011, corresponding to an integrated luminosity of 4.9 fb−1, is used. The amount of background, f...

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Detalles Bibliográficos
Autores principales: Alonso, Francisco, Anduaga, Xabier Sebastián, Dova, María Teresa, Monticelli, Fernando Gabriel, Tripiana, Martín F., The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2013
Materias:
Ciencias Exactas
Física
hadron-hadron scattering
Fotones
proton-proton collisions
ATLAS detector
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/78761
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-78761
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
hadron-hadron scattering
Fotones
proton-proton collisions
ATLAS detector
spellingShingle Ciencias Exactas
Física
hadron-hadron scattering
Fotones
proton-proton collisions
ATLAS detector
Alonso, Francisco
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín F.
The ATLAS Collaboration
Measurement of isolated-photon pair production in pp collisions at √s = 7 TeV with the ATLAS detector
topic_facet Ciencias Exactas
Física
hadron-hadron scattering
Fotones
proton-proton collisions
ATLAS detector
description The ATLAS experiment at the LHC has measured the production cross section of events with two isolated photons in the final state, in proton-proton collisions at √s = 7TeV. The full data set collected in 2011, corresponding to an integrated luminosity of 4.9 fb−1, is used. The amount of background, from hadronic jets and isolated electrons, is estimated with data-driven techniques and subtracted. The total cross section, for two isolated photons with transverse energies above 25 GeV and 22 GeV respectively, in the acceptance of the electromagnetic calorimeter (|η| < 1.37 and 1.52 < |η| < 2.37) and with an angular separation ΔR > 0.4, is 44.0+3.2 −4.2 pb. The differential cross sections as a function of the di-photon invariant mass, transverse momentum, azimuthal separation, and cosine of the polar angle of the largest transverse energy photon in the Collins-Soper di-photon rest frame are also measured. The results are compared to the prediction of leading-order parton-shower and next-to-leading-order and next-to-next-to-leading-order parton-level generators.
format Articulo
Articulo
author Alonso, Francisco
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín F.
The ATLAS Collaboration
author_facet Alonso, Francisco
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín F.
The ATLAS Collaboration
author_sort Alonso, Francisco
title Measurement of isolated-photon pair production in pp collisions at √s = 7 TeV with the ATLAS detector
title_short Measurement of isolated-photon pair production in pp collisions at √s = 7 TeV with the ATLAS detector
title_full Measurement of isolated-photon pair production in pp collisions at √s = 7 TeV with the ATLAS detector
title_fullStr Measurement of isolated-photon pair production in pp collisions at √s = 7 TeV with the ATLAS detector
title_full_unstemmed Measurement of isolated-photon pair production in pp collisions at √s = 7 TeV with the ATLAS detector
title_sort measurement of isolated-photon pair production in pp collisions at √s = 7 tev with the atlas detector
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/78761
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