Pló Casasús, MáximoSaborido Silva, Juan JoséMartínez Santos, DiegoVázquez Sierra, Carlos2017-02-152017-02-152016http://hdl.handle.net/10347/15157This research project will be carried out doing data analysis in the LHCb collaboration. LHCb is one of the four big experiments running in the Large Hadron Collider at CERN, and is mainly designed to make precise measurements of CP violation and to study rare decays of B and D mesons. In particular, the research plan proposed here will focus in a time integrated analysis of Bs⁰ → J/ψK*⁰ decays with 3 inverse femtobarns of LHCb data to measure the branching fraction, polarization fractions and direct CP asymmetries. These observables will afterwords be used to compute the hadronic parameters which describe the loop diagram (penguin) effects in the Bs⁰ → J/ψϕ channel, which is considered to be the “golden” mode to measure the weak phase of the Bs⁰ mixing. This CP violating phase is predicted by the Standard Model to be very small, and penguin contributions could be confused with new physics phenomena if not taken into account. In addition, a search of A1⁰ → μ⁺μ⁻ decays, where A1⁰ is a light CP-odd Higgs boson in the NMSSM, is part of the research plan as well.engEsta obra atópase baixo unha licenza internacional Creative Commons BY-NC-ND 4.0. Calquera forma de reprodución, distribución, comunicación pública ou transformación desta obra non incluída na licenza Creative Commons BY-NC-ND 4.0 só pode ser realizada coa autorización expresa dos titulares, salvo excepción prevista pola lei. Pode acceder Vde. ao texto completo da licenza nesta ligazón: https://creativecommons.org/licenses/by-nc-nd/4.0/deed.glhttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.glpartículas subatómicasHEPfísica de partículasdetector LHCbMaterias::Investigación::22 Física::2208 Nucleónica::220805 Aceleradores de partículasMaterias::Investigación::22 Física::2208 Nucleónica::220806 Detectores de partículasMaterias::Investigación::22 Física::2208 Nucleónica::220807 Física de partículasdoctoral thesisopen access