Study of associated production of ϒ and D*± in pp collisions at √s = 13 TeV with the CMS detector at LHC and contributions for the maintenance, performance and upgrade of the RPC system

Detalhes bibliográficos
Ano de defesa: 2023
Autor(a) principal: Amarilo, Kevin Mota
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Tese
Tipo de acesso: Acesso aberto
Idioma: eng
Instituição de defesa: Universidade do Estado do Rio de Janeiro
Centro de Tecnologia e Ciências::Instituto de Física Armando Dias Tavares
Brasil
UERJ
Programa de Pós-Graduação em Física
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://www.bdtd.uerj.br/handle/1/20911
Resumo: This work presents the analysis of the associated production of ϒ and D*± using pp collision data collected by CMS, at √s = 13 TeV, with integrated luminosity of 123 fb¯¹. The associated production of ϒ and open charm hadrons is considered a golden channel to study the double-parton scattering (DPS), as the single-parton scattering contribution (SPS) is expected to be negligible. The reconstruction of the two mesons is done through ϒ (nS) → μ⁺μ¯ and D*⁺→ D°π⁺→ K¯π⁺π⁺ decay channels. A fiducial cross section for the ϒ + D* production is measured and, by assuming that the production occurs exclusively via DPS, a lower limit of the effective cross section of 7.5±1.1 mb is obtained. Apart from the analysis, this document also discuss the work done for the CMS RPC project on the maintenance and commissioning, in preparation for the new data taking period (Run 3), and the R&D of the new iRPC detectors expected to be installed in CMS during the Phase 2 upgrade.