Amplitude Analysis of the B0 --> K*0 mu+ mu-→ K Decay
An amplitude analysis of the decay is presented using a dataset corresponding to an integrated luminosity of fb of collision data collected with the LHCb experiment. For the first time, the coefficients associated to short-distance physics effects, sensitive to processes beyond the Standard Model, a...
| Autores: | , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Universidad de Santiago de Compostela (USC) |
| Repositorio: | Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela |
| Idioma: | inglés |
| OAI Identifier: | oai:minerva.usc.gal:10347/44830 |
| Acceso en línea: | https://hdl.handle.net/10347/44830 |
| Access Level: | acceso abierto |
| Palabra clave: | Flavor changing neutral currents Leptonic Semileptonic and radiative decays Rare decays Hadron colliders 2290 Física altas energías |
| Sumario: | An amplitude analysis of the decay is presented using a dataset corresponding to an integrated luminosity of fb of collision data collected with the LHCb experiment. For the first time, the coefficients associated to short-distance physics effects, sensitive to processes beyond the Standard Model, are extracted directly from the data through a -unbinned amplitude analysis, where is the invariant mass squared. Long-distance contributions, which originate from non-factorisable QCD processes, are systematically investigated and the most accurate assessment to date of their impact on the physical observables is obtained. The pattern of measured corrections to the short-distance couplings is found to be consistent with previous analyses of - to -quark transitions, with the largest discrepancy from the Standard Model predictions found to be at the level of 1.8 standard deviations. The global significance of the observed differences in the decay is 1.4 standard deviations. |
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