Study of the semilepottonic decays Υ(1S)→B_((c))lν_(l)  

作　　者：C.T.Tran M.A.Ivanov P.Santorelli H.C.Tran 

机构地区：[1]Department of Physics,HCMC University of Technology and Education,Vo Van Ngan 1,700000 Ho Chi Minh City,Vietnam [2]Bogoliubov Laboratory of Theoretical Physics,Joint Institute for Nuclear Research,141980 Dubna,Russia [3]Dipartimento di Fisica“E.Pancini”,Universitàdi Napoli Federico II,Complesso Universitario di Monte S.Angelo,Via Cintia,Edificio 6,80126Napoli,Italy [4]Istituto Nazionale di Fisica Nucleare,Sezione di Napoli,80126 Napoli,Italy

出　　处：《Chinese Physics C》2025年第1期177-185,共9页中国物理C(英文版)

基　　金：Supported by Ho Chi Minh City University of Technology and Education under Grant T2023-76。

摘　　要：We study the exclusive semileptonic decaysΥ(1S)→B_((c))lν_(l),where t=e,μ,t.The relevant hadronic form factors are calculated using the covariant confined quark model developed previously by our group.We predict the branching fractions B(Υ(1S)→B_((c))lν_(l))(vl)to be of the order of 10^(-13)and 10^(-10)for the case of B and B_(C),respectively.Our predictions agree well with other theoretical calculations.We also consider the effects of possible new physics in the case of Υ(1S)→B_((c))τν_(τ)and show that the branching fraction of this decay can be enhanced by an order of magnitude using constraints from the B-→D^((*))lν_(l)and B_(C)→J/Ψlν_(l)experimental data.

关 键 词：heavy quarkonia covariant confined quark model semileptonic decay 

分 类 号：O572.32[理学—粒子物理与原子核物理]