Study of central exclusive W+W− in the fully leptonic channel at √s =13 TeV with PPS/CMS and investigation of anomalous quartic gauge couplings

• Ano de defesa: 2019
• Autor(a) principal: Chagas, Ewerton Belchior Batista das
• 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; BR; UERJ; Programa de Pós-Graduação em Física
• Palavras-chave em Português: Central exclusive processes; Proton tagging; Compact Muon Solenoid; Forward detectors; Processos centrais exclusivos; Tagging de prótons; Solenóide Compacto de Múons.; Detectores frontais; CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA::FISICA NUCLEAR
• Link de acesso: http://www.bdtd.uerj.br/handle/1/12821

In this thesis we present a study on the central exclusive process γγ → W+W− in the fully leptonic channel with PPS/CMS in the center of mass energy √s = 13 TeV and an investigation of anomalous quartic gauge couplings (AQGC s). Central exclusive processes pp → p ⊕ X ⊕ p are characterised by rapidity gaps between the central system X and the scattered protons. The muon channel is characterised by a missing transverse energy (MET) associated to the neutrinos, and the proton tagging is done using the new forward detector PPS (CMS-TOTEM Precision Proton Spectrometer), located at about ±210 ~ m from the interaction point. We present a proposal of a kinematic fit for the discrimination between the signal and associated background, which allows one to match the central system X with the kinematics of the protons reconstructed at PPS. Different values of couplings are studied aiming to obtain a better understanding on the achievable sensitivity when considering the fully leptonic final state.