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 t...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.展开更多
基金Supported by Ho Chi Minh City University of Technology and Education under Grant T2023-76。
文摘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.
