Search for a Heavy Neutrino in τ Decays at Belle

被引：3
|
作者：
Liventsev, D.
Adachi, I.
Aihara, H.
Al Said, S.
Asner, D. M.
Atmacan, H.
Ayad, R.
Babu, V.
Banerjee, Sw.
Bauer, M.
Behera, P.
Belous, K.
Bennett, J.
Bessner, M.
Bilka, T.
Biswas, D.
Bodrov, D.
Bonvicini, G.
Borah, J.
Bozek, A.
Bracko, M.
Branchini, P.
Browder, T. E.
Budano, A.
Campajola, M.
Cervenkov, D.
Chang, M. -C
Chen, A.
Cheon, B. G.
Cho, H. E.
Cho, K.
Cho, S. -J
Choi, S. -K
Choi, Y.
Choudhury, S.
Cinabro, D.
Das, S.
De Nardo, G.
De Pietro, G.
Dhamija, R.
Di Capua, F.
Dolezal, Z.
Dong, T., V
Dossett, D.
Epifanov, D.
Ferber, T.
Ferlewicz, D.
Fulsom, B. G.
Garg, R.
Gaur, V.
机构：
来源：
PHYSICAL REVIEW LETTERS | 2023年 / 131卷 / 21期
基金：
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; 瑞士国家科学基金会; 美国能源部; 欧洲研究理事会;
关键词：
MONTE-CARLO; IDENTIFICATION; SIMULATION;
D O I：
10.1103/PhysRevLett.131.211802
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report on a search for a heavy Majorana neutrino in the decays tau(-) -> pi(-) nu(h), nu(h) -> pi(I)l(-/+), l = e, mu. The results are obtained using the full data sample of 988 fb(-1) collected with the Belle detector at the KEKB asymmetric energy e(+)e(-) collider, which contains 912 x 10(6) tau tau pairs. We observe no significant signal and set 95% CL upper limits on the couplings of the heavy right-handed neutrinos to the conventional standard model left-handed neutrinos in the mass range 0.2-1.6 GeV/c(2). This is the first study of a mixed couplings of heavy neutrinos to tau leptons and light-flavor leptons.
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页数：7
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