Search for the semileptonic decays Ξc0→ Ξ0l+l- at Belle

被引：0
|
作者：
Cui, J. X.
Li, Y. B.
Shen, C. P.
Adachi, I
Aihara, H.
Al Said, S.
Asner, D. M.
Aushev, T.
Ayad, R.
Babu, V.
Bahinipati, S.
Banerjee, Sw.
Bauer, M.
Behera, P.
Belous, K.
Bennett, J.
Bessner, M.
Bhuyan, B.
Bilka, T.
Biswas, D.
Bobrov, A.
Bodrov, D.
Borah, J.
Bracko, M.
Branchini, P.
Browder, T. E.
Budano, A.
Campajola, M.
Cervenkov, D.
Chang, M. -C.
Cheon, B. G.
Chilikin, K.
Cho, K.
Choi, S. -K.
Choi, Y.
Choudhury, S.
Das, S.
Dash, N.
De Nardo, G.
De Pietro, G.
Dhamija, R.
Di Capua, F.
Dingfelder, J.
Dolezal, Z.
Dong, T. V.
Dubey, S.
Ecker, P.
Epifanov, D.
Ferber, T.
Ferlewicz, D.
机构：
来源：
PHYSICAL REVIEW D | 2024年 / 109卷 / 05期
基金：
新加坡国家研究基金会; 美国国家科学基金会; 瑞士国家科学基金会; 国家重点研发计划; 奥地利科学基金会; 欧洲研究理事会; 中国国家自然科学基金; 美国能源部; 欧盟地平线“2020”;
关键词：
BRANCHING FRACTION; IDENTIFICATION;
D O I：
10.1103/PhysRevD.109.052003
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Using the full data sample of 980fb(-1) collected with the Belle detector at the KEKB asymmetric energy electron-positron collider, we report the results of the first search for the rare semileptonic decays Xi(0)(c)->Xi 0l & thorn;l-(l 1/4 eor mu). No significant signals are observed in the Xi 0l & thorn;l-invariant-mass distributions. Taking the de fraction ratios B( Xi(0)(c)->Xi(e0)& thorn;e-& THORN;=B & eth;Xi 0c ->Xi-pi & thorn;& THORN;<6.7x10-3andB & eth;Xi 0c ->Xi 0 mu & thorn;mu-& THORN;=B & eth;Xi 0c ->Xi-pi & thorn;& THORN;<4.3x10-3based on the phase-space assumption for signal decays. The 90% credibility upperlimits on the absolute branching fractions of B & eth;Xi 0c ->Xi 0e & thorn;e-) and B & eth;Xi(0)c ->Xi(0)mu(+)mu(-)) are found to be9.9x10(-5 )and 6.5x10(-5), respectively.
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页数：8
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