Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/32012
Título: | Measurement of isolated-photon pair production in pp collisions at s√=7 TeV with the ATLAS detector |
Autor(es): | Onofre, A. Castro, Nuno Filipe Silva Fernandes ATLAS Collaboration |
Palavras-chave: | Hadron-Hadron Scattering |
Data: | 2013 |
Editora: | Springer Verlag |
Revista: | Journal of High Energy Physics |
Citação: | Aad, G., Abajyan, T., Abbott, B., Abdallah, J., Khalek, S. A., Abdelalim, A. A., . . . Zwalinski, L. (2013). Measurement of isolated-photon pair production in pp collisions at √s=7TeV with the ATLAS detector. Journal of High Energy Physics, 2013(1). doi: 10.1007/jhep01(2013)086 |
Resumo(s): | 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 = 7 TeV. 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 ∆R > 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. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/32012 |
DOI: | 10.1007/jhep01(2013)086 |
ISSN: | 1029-8479 |
e-ISSN: | 1029-8479 |
Versão da editora: | http://link.springer.com/article/10.1007/jhep01(2013)086 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | LIP - Artigos/papers |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Measurement of isolated-photon pair production in pp.pdf | 938,99 kB | Adobe PDF | Ver/Abrir |