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

AuthorsGarcía Martín, L. M.; Henry, L.; Jashal, B.; Martínez-Vidal, Fernando ; Oyanguren, Arantza ; Remón Alepuz, Clara; Ruiz Vidal, Joan; Sánchez Mayordomo, Carlos ; LHCb Collaboration
Issue DateJul-2019
PublisherInstitute of Physics Publishing
CitationJournal of High Energy Physics 2019: 32 (2019)
AbstractThe B→ KK¯ and Bs0→K∗0K¯∗0 decays are studied using proton-proton collision data corresponding to an integrated luminosity of 3 fb. An untagged and timeintegrated amplitude analysis of B → (Kπ)(Kπ) decays in two-body invariant mass regions of 150 MeV/c around the K mass is performed. A stronger longitudinal polarisation fraction in the B→ KK¯ decay, f = 0.724 ± 0.051 (stat) ± 0.016 (syst), is observed as compared to f = 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.[Figure not available: see fulltext.]
Identifiersdoi: 10.1007/JHEP07(2019)032
issn: 1029-8479
Appears in Collections:(IFIC) Artículos
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