Measurement of D*(+/-) meson production in jets from pp collisions at root s=7 TeV with the ATLAS detector

• Autor(a) principal: Onofre, A.
• Data de Publicação: 2012
• Outros Autores: Castro, Nuno Filipe Silva Fernandes, ATLAS Collaboration
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/1822/46282
• topic: Ciências Naturais::Ciências Físicas; Ciências Naturais::Ciências Físicas; Science & Technology

This paper reports a measurement of D*± meson production in jets from proton-proton collisions at a center-of-mass energy of √s=7  TeV at the CERN Large Hadron Collider. The measurement is based on a data sample recorded with the ATLAS detector with an integrated luminosity of 0.30  pb−1 for jets with transverse momentum between 25 and 70 GeV in the pseudorapidity range |η|<2.5. D*± mesons found in jets are fully reconstructed in the decay chain: D*+→D0π+, D0→K−π+, and its charge conjugate. The production rate is found to be N(D*±)/N(jet)=0.025±0.001(stat.)±0.004(syst.) for D*± mesons that carry a fraction z of the jet momentum in the range 0.3<z<1. Monte Carlo predictions fail to describe the data at small values of z, and this is most marked at low jet transverse momentum.