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dc.contributor.advisorPló Casasús, Máximo
dc.contributor.advisorSantamarina Ríos, Cibrán
dc.contributor.authorVieites Díaz, María
dc.description.abstractThis thesis is devoted to the study of the B0 → ρ(770)0K∗(892)0 decay mode for which 3 fb−1 of proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV were analysed. The details of an amplitude analysis of B0 → (π+π−)(K+π−) decays performed in the two-body invariant mass regions corresponding to 300 < m(π+π−) < 1100 MeV/c2 and 750 < m(K+π−) < 1200 MeV/c2 are documented and the full set of results from the am- plitude analysis is discussed. These correspond to the CP averages and asymmetries for the magnitudes and phase differences of the contributing amplitudes. The results presented in this work correspond to the first measurements of most of these observables. In particular, the CP-averaged longitudinal polarisation fractions of the vector-vector modes are found to be f ̃0(ρK*)= 0.164 ± 0.015 ± 0.022 and f ̃0(ωK*) = 0.68 ± 0.17 ± 0.16, and their CP asymmetries, A0ρK∗ = −0.62 ± 0.09 ± 0.09 and A0ωK∗ = −0.13 ± 0.27 ± 0.13, where the first uncertainty is statistical and the second systematic. As a result from this work, the first observation of direct CP violation in amplitude analyses of vector-vector decays was achieved.
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional
dc.subjectExperimental High Energy Physics, LHCb
dc.subjectHeavy Flavour Physics
dc.subjectDirect CP violation
dc.subject.classificationMaterias::Investigación::22 Física::2290 Física altas energías::229001 Física teórica altas energías
dc.subject.classificationMaterias::Investigación::22 Física::2212 Física teórica::221202 Partículas elementales
dc.titleStudy of the B0→ρ(770)0K*(892)0 decay with an amplitude analysis of B0→(π+π−)(K+π−) decays
dc.contributor.affiliationUniversidade de Santiago de Compostela. Centro Internacional de Estudos de Doutoramento e Avanzados (CIEDUS)
dc.contributor.affiliationUniversidade de Santiago de Compostela. Escola de Doutoramento Internacional en Ciencias e Tecnoloxía
dc.contributor.affiliationUniversidade de Santiago de Compostela. Programa de Doutoramento en Física Nuclear e de Partículas

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Attribution-NonCommercial-NoDerivatives 4.0 Internacional
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