Publicação

Measurement of the inclusive isolated prompt photons cross section in pp collisions at s√=7 TeV with the ATLAS detector using 4.6 fb−1

Detalhes bibliográficos
Resumo:	A measurement of the cross section for the production of isolated prompt photons in pp collisions at a center-of-mass energy s√=7 TeV is presented. The results are based on an integrated luminosity of 4.6 fb−1 collected with the ATLAS detector at the LHC. The cross section is measured as a function of photon pseudorapidity ηγ and transverse energy EγT in the kinematic range 100≤EγT<1000 GeV and in the regions \|ηγ\|<1.37 and 1.52≤\|ηγ\|<2.37. The results are compared to leading-order parton-shower Monte Carlo models and next-to-leading-order perturbative QCD calculations. Next-to-leading-order perturbative QCD calculations agree well with the measured cross sections as a function of EγT and ηγ.
Autores principais:	Onofre, A.
Outros Autores:	Castro, Nuno Filipe Silva Fernandes; ATLAS Collaboration
Assunto:	Ciências Naturais::Ciências Físicas
Ano:	2014
País:	Portugal
Tipo de documento:	artigo
Tipo de acesso:	acesso aberto
Instituição associada:	Universidade do Minho
Idioma:	inglês
Origem:	RepositóriUM - Universidade do Minho

Descrição
Resumo:	A measurement of the cross section for the production of isolated prompt photons in pp collisions at a center-of-mass energy s√=7 TeV is presented. The results are based on an integrated luminosity of 4.6 fb−1 collected with the ATLAS detector at the LHC. The cross section is measured as a function of photon pseudorapidity ηγ and transverse energy EγT in the kinematic range 100≤EγT<1000 GeV and in the regions \|ηγ\|<1.37 and 1.52≤\|ηγ\|<2.37. The results are compared to leading-order parton-shower Monte Carlo models and next-to-leading-order perturbative QCD calculations. Next-to-leading-order perturbative QCD calculations agree well with the measured cross sections as a function of EγT and ηγ.