Estudo sobre a razão de produção difrativa e total de B+→ Ј/Ψ K+ no CMS

• Autor(a) principal: Damião, Dilson de Jesus
• Data de Publicação: 2010
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/12876
• topic: Diffractive physics; Heavy flavor physics; CMS/LHC; Física difrativa; Física de sabores pesados; CMS/LHC; CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA::FISICA DAS PARTICULAS ELEMENTARES E CAMPOS

This work concerns the study of the diffractive production ratio of the B+ meson decaying into J=y + K+, in the CMS/LHC environment, thus contributing to an general understanding of the Standard Model (SM) as the theory of fundamental interactions between elementary particles. To begin with, an analysis is done in order to select the events that have B+, as the study of the mentioned channel could provide the first measurement of the exclusive production of B mesons at the energy scale of the LHC. Also, it is an important channel both for further analysis and to make CMS calibrations. Furthermore, we show how to identify diffractive events in CMS, using low multiplicity of active cells in the forward calorimeters, HF and CASTOR. This study was based on computer simulations, which reproduce the Physics conditions expected for CMS at 10 TeV. The POMWIG generator was used to produce the diffractive samples and the others were done with PYTHIA.