Measurement of the branching fractions of (B)over-bar → D(*)K-K(*)0(S) and (B)over-bar → D(*)D-s decays at Belle II

被引：0
|
作者：
Adachi, I.
Aggarwal, L.
Aihara, H.
Akopov, N.
Aloisio, A.
Althubiti, N.
Ky, N. Anh
Asner, D. M.
Atmacan, H.
Aushev, T.
Aushev, V.
Aversano, M.
Ayad, R.
Babu, V.
Bae, H.
Bahinipati, S.
Bambade, P.
Banerjee, Sw.
Bansal, S.
Barrett, M.
Baudot, J.
Baur, A.
Beaubien, A.
Becherer, F.
Becker, J.
Bennett, J. V.
Bernlochner, F. U.
Bertacchi, V.
Bertemes, M.
Bertholet, E.
Bessner, M.
Bettarini, S.
Bhuyan, B.
Bianchi, F.
Bierwirth, L.
Bilka, T.
Biswas, D.
Bobrov, A.
Bodrov, D.
Bolz, A.
Boschetti, A.
Bozek, A.
Bracko, M.
Branchini, P.
Briere, R. A.
Browder, T. E.
Budano, A.
Bussino, S.
Campagna, Q.
Campajola, M.
机构：
来源：
JOURNAL OF HIGH ENERGY PHYSICS | 2024年 / 08期
基金：
新加坡国家研究基金会; 加拿大自然科学与工程研究理事会; 以色列科学基金会; 奥地利科学基金会; 国家重点研发计划; 日本学术振兴会; 澳大利亚研究理事会; 中国国家自然科学基金; 美国国家科学基金会; 欧洲研究理事会; 欧盟地平线“2020”;
关键词：
B Physics; Branching fraction; e(+)-e(-) Experiments; Particle and Resonance Production;
D O I：
10.1007/JHEP08(2024)206
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We present measurements of the branching fractions of eight (B) over bar -> (D(*)+K-K()*()0)((S)), B- -> D-(*(K-K()-K-)0*()0)((S)) decay channels. The results are based on data from SuperKEKB electron-positron collisions at the Upsilon(4S) resonance collected with the Belle II detector, corresponding to an integrated luminosity of 362 fb(-1). The event yields are extracted from fits to the distributions of the difference between expected and observed B meson energy, and are efficiency-corrected as a function of m((K-K()*()0)((S))) and m(D-(*K-)(()*()0)((S))) in order to avoid dependence on the decay model. These results include the first observation of (B) over bar (0) -> (D+K-KS0), B- -> D*(K-KS0)-K-0, and (B) over bar (0) -> D*(+K-KS0) decays and a significant improvement in the precision of the other channels compared to previous measurements. The helicity-angle distributions and the invariant mass distributions of the (K-K()*()0)((S)) systems are compatible with quasi-two-body decays via a resonant transition with spin-parity J(P) = 1(-) for the (K-KS0) systems and J(P) = 1(+) for the K-K*(0) systems. We also present measurements of the branching fractions of four (B) over bar (0) -> D-(*D-)+(s)-, B- -> D-(*D-)0(s)- decay channels with a precision compatible to the current world averages.
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页数：36
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