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).
Text
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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 |
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Depositing User: | Symplectic Admin |
Date Deposited: | 14 Aug 2019 09:44 |
Last Modified: | 19 Jan 2023 00:31 |
DOI: | 10.1007/JHEP07(2019)032 |
Open Access URL: | http://doi.org/10.1007/JHEP07(2019)032 |
URI: | https://livrepository.liverpool.ac.uk/id/eprint/3051711 |