2026-04-17T10:44:30Zhttps://recercat.cat/oai/requestoai:recercat.cat:2445/1623002025-12-05T16:38:37Zcom_2072_1057col_2072_478823col_2072_478904col_2072_478917
RECERCAT
author
LHCb Collaboration
author
Alfonso Albero, Alejandro
author
Calvo Gómez, Míriam
author
Camboni, Alessandro
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Coquereau, Samuel
author
Garrido Beltrán, Lluís
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Gascón Fora, David
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Gironella Gironell, Pere
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Graciani Díaz, Ricardo
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Graugés Pous, Eugeni
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Vilasis-Cardona, Xavier
author
Marin Benito, Carla
2020-05-25T13:24:23Z2020-05-25T13:24:23Z2019-07-052020-05-25T13:24:24Z
The B0→K∗0K¯¯¯¯¯∗0 and B0s→K∗0K¯¯¯¯¯∗0 decays are studied using proton-proton collision data corresponding to an integrated luminosity of 3 fb−1. An untagged and timeintegrated amplitude analysis of B 0(s) → (K+π−)(K−π+) decays in two-body invariant mass regions of 150 MeV/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 B0s→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.
cc-by (c) LHCb Collaboration et al., 2019 http://creativecommons.org/licenses/by/3.0/es info:eu-repo/semantics/openAccess
Hadrons
Física de partícules
Experiments
Hadrons
Particle physics
Experiments
Amplitude analysis of the B(s)0→K∗0K¯∗0 decays and measurement of the branching fraction of the B→ K∗ 0K¯ ∗ 0 decay
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion