Search for Baryon-Number-Violating Processes in B- Decays to the (Ξ)over-barc0(Λ)over-barc- Final State

被引：0

作者：

Gu, T.

Savinov, V.

Adachi, I.

Aihara, H.

Asner, D. M.

Atmacan, H.

Aushev, T.

Ayad, R.

Banerjee, Sw.

Belous, K.

Bennett, J.

Bessner, M.

Bhardwaj, V.

Bhuyan, B.

Biswas, D.

Bobrov, A.

Bodrov, D.

Borah, J.

Bozek, A.

Bracko, M.

Branchini, P.

Browder, T. E.

Budano, A.

Campajola, M.

Cervenkov, D.

Chang, M. -C.

Chang, P.

Cheon, B. G.

Chilikin, K.

Cho, K.

Choi, S. -K.

Choi, Y.

Choudhury, S.

Das, S.

De Nardo, G.

De Pietro, G.

Dhamija, R.

Di Capua, F.

Dingfelder, J.

Dolezal, Z.

Dong, T. V.

Dubey, S.

Ecker, P.

Ferber, T.

Ferlewicz, D.

Fulsom, B. G.

Gaur, V.

Giri, A.

Goldenzweig, P.

Graziani, E.

机构：

来源：

PHYSICAL REVIEW LETTERS | 2024年 / 133卷 / 07期

基金：

奥地利科学基金会; 瑞士国家科学基金会; 中国国家自然科学基金; 国家重点研发计划; 欧盟地平线“2020”; 美国国家科学基金会; 新加坡国家研究基金会; 澳大利亚研究理事会; 日本学术振兴会;

关键词：

D O I：

10.1103/PhysRevLett.133.071802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the results of the first search for B- decays to the (Xi) over bar (0)(c)(Lambda) over bar (-)(c) final state using 711 fb(-1) of data collected at the gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The results are interpreted in terms of both direct baryon-number-violating B- decay and (Xi) over bar (0)(c) - (Xi) over bar (0)(c) oscillations which follow the standard model decay B- -> (Xi) over bar (0)(c)(Lambda) over bar (-)(c) . We observe no evidence for baryon number violation and set the 95% confidence-level upper limits on the ratio of baryon-number-violating and standard model branching fractions B(B- -> (Xi) over bar (0)(c)(Lambda) over bar (c))/B(B- -> (Xi) over bar (0)(c)(Lambda) over bar (c)) to be < 2.7% and on the effective angular frequency of mixing omega in <(Xi)over bar>(0)(c) - (Xi) over bar (0)(c) oscillations to be < 0.76 ps(-1) (equivalent to tau(mix) > 1.3 ps).

引用

页数：7

共 18 条

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