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Study of the semileptonic decays Υ(1S)→ B(c)?(v)?

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Study of the semileptonic decays Υ(1S)→ B(c)?(v)?
We study the exclusive semileptonic decays Υ(1S)→ B(c)ℓ(v)ℓ,where ℓ=e,μ,τ.The relevant hadronic form factors are calculated using the covariant confined quark model developed previously by our group.We pre-dict the branching fractions B(Υ(1S)→ B(c)ℓ(v)ℓ)to be of the order of 10-13 and 10-10 for the case of B and B c,re-spectively.Our predictions agree well with other theoretical calculations.We also consider the effects of possible new physics in the case of Υ(1S)→ B cτ(v)τ and show that the branching fraction of this decay can be enhanced by an order of magnitude using constraints from the B →D(*)ℓ(v)ℓ and B c → J/Ψℓ(v)ℓ experimental data.

heavy quarkoniacovariant confined quark modelsemileptonic decay

C.T.Tran、M.A.Ivanov、P.Santorelli、H.C.Tran

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Department of Physics,HCMC University of Technology and Education,Vo Van Ngan 1,700000 Ho Chi Minh City,Vietnam

Bogoliubov Laboratory of Theoretical Physics,Joint Institute for Nuclear Research,141980 Dubna,Russia

Dipartimento di Fisica"E.Pancini",Università di Napoli Federico Ⅱ,Complesso Universitario di Monte S.Angelo,Via Cintia,Edificio 6,80126 Napoli,Italy

Istituto Nazionale di Fisica Nucleare,Sezione di Napoli,80126 Napoli,Italy

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heavy quarkonia covariant confined quark model semileptonic decay

2025

10.1088/1674-1137/ad83ab

中国物理C(英文版)
中国物理学会　中国科学院高能物理研究所　中国科学院近代物理研究所

中国物理C(英文版)

影响因子：0.347
ISSN：1674-1137
年,卷(期)：2025.49(1)