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



Aaij, R, Abellán Beteta, C, Adeva, B, Adinolfi, M, Aidala, CA, Ajaltouni, Z, Akar, S, Albicocco, P, Albrecht, J, Alessio, F
et al (show 90 more authors) (2019) Amplitude analysis of the B(s)0→<sup>K∗0</sup><sup>K¯∗0</sup> decays and measurement of the branching fraction of the B→ K<sup>∗ 0</sup>K¯ <sup>∗ 0</sup> decay. Journal of High Energy Physics, 2019 (7).

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Abstract

© 2019, The Author(s). The B→ K∗ 0K¯ ∗ 0 and Bs0→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(s)0 → (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 B→ 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.[Figure not available: see fulltext.]

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 14 Aug 2019 09:44
Last Modified: 20 Nov 2019 08:21
DOI: 10.1007/JHEP07(2019)032
Open Access URL: http://doi.org/10.1007/JHEP07(2019)032
URI: http://livrepository.liverpool.ac.uk/id/eprint/3051711
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