Amplitude analysis of the B0→K∗0K∗0 decays and measurement of the branching fraction of the B0(s)→K∗0K∗0 decay

The B0 → K∗0K∗0 and Bs0 → K∗0K∗0 decays are studied using proton-proton collision data corresponding to an integrated luminosity of 3fb−1. An untagged and time- integrated amplitude analysis of B0 → (K+π−)(K−π+) decays in two-body invariant (s) mass regions of 150MeV/c2 around the K∗0 mass is perfor...

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Detalles Bibliográficos
Autores: LHCb Collaboration, Adeva Andany, Bernardo, Álvarez Cartelle, Paula, Alves, António Augusto, Boente García, Óscar, Chobanova, Veronika, Cid Vidal, Xabier, Dalseno, Jeremy, Dosil Suárez, Álvaro, Fernández Prieto, Antonio, Gallas Torreira, Abraham, García Plana, Beatriz, Lucio Martínez, M., Martínez Santos, Diego, Pló Casasús, Máximo, Prouve, Claire, Ramos Pernas, Miguel, Romero Vidal, Antonio, Saborido Silva, Juan José, Sanmartín Sedes, Brais, Santamarina Ríos, Cibrán, Vázquez Regueiro, Pablo, Vieites Díaz, María
Tipo de recurso: artículo
Fecha de publicación:2019
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:10347/45136
Acceso en línea:https://hdl.handle.net/10347/45136
Access Level:acceso abierto
Palabra clave:B physics
Hadron-Hadron scattering (experiments)
Descripción
Sumario:The B0 → K∗0K∗0 and Bs0 → K∗0K∗0 decays are studied using proton-proton collision data corresponding to an integrated luminosity of 3fb−1. An untagged and time- integrated amplitude analysis of B0 → (K+π−)(K−π+) decays in two-body invariant (s) mass regions of 150MeV/c2 around the K∗0 mass is performed. A stronger longitudinal polarisation fraction in the B0 → K∗0K∗0 decay, fL = 0.724 ± 0.051 (stat) ± 0.016 (syst), is observed as compared to fL = 0.240 ± 0.031 (stat) ± 0.025 (syst) in the Bs0 → K∗0K∗0 decay. The ratio of branching fractions of the two decays is measured and used to determine B(B0 → K∗0K∗0) = (8.0 ± 0.9 (stat) ± 0.4 (syst)) × 10−7

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