Measurement of Angular Coefficients of (B)over-bar → D*l(ν)over-barl: Implications for |Vcb| and Tests of Lepton Flavor Universality

被引：2
|
作者：
Prim, M. T.
Bernlochner, F.
Metzner, F.
Aihara, H.
Asner, D. M.
Aushev, T.
Ayad, R.
Babu, V.
Banerjee, Sw.
Behera, P.
Belous, K.
Bennett, J.
Bessner, M.
Bhardwaj, V.
Bhuyan, B.
Bilka, T.
Biswas, D.
Bodrov, D.
Bondar, A.
Borah, J.
Bracko, M.
Branchini, P.
Browder, T. E.
Budano, A.
Campajola, M.
Cao, L.
Cervenkov, D.
Chang, P.
Cheon, B. G.
Choi, S. -K.
Choi, Y.
Choudhury, S.
Cochran, J.
Das, S.
Dash, N.
De Nardo, G.
De Pietro, G.
Dhamija, R.
Di Capua, F.
Dolezal, Z.
Dong, T. V.
Dubey, S.
Ecker, P.
Epifanov, D.
Ferber, T.
Ferlewicz, D.
Fulsom, B. G.
Garg, R.
Gaur, V.
Giri, A.
机构：
来源：
PHYSICAL REVIEW LETTERS | 2024年 / 133卷 / 13期
基金：
日本学术振兴会; 美国国家科学基金会; 国家重点研发计划; 奥地利科学基金会; 新加坡国家研究基金会; 欧盟地平线“2020”; 澳大利亚研究理事会; 美国能源部; 瑞士国家科学基金会; 中国国家自然科学基金;
关键词：
DISPERSIVE BOUNDS;
D O I：
10.1103/PhysRevLett.133.131801
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We measure the complete set of angular coefficients J(i) for exclusive (B) over bar -> D*l (nu) over bar (l) (l = e, mu). Our analysis uses the full 711 fb(-1) Belle dataset with hadronic tag-side reconstruction. The results allow us to extract the form factors describing the (B) over bar -> D* transition and the Cabibbo-Kobayashi-Maskawa matrix element jVcbj. Using recent lattice QCD calculations for the hadronic form factors, we find vertical bar V-cb vertical bar = (40.7 +/- 0.7) x 10(-3) using the Boyd-Grinstein-Lebed parametrization, compatible with determinations from inclusive semileptonic decays. We search for lepton flavor universality violation as a function of the hadronic recoil parameter w and investigate the differences of the electron and muon angular distributions. We find no deviation from standard model expectations.
引用
收藏
页数：7
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