Study of B _c ?i>J / ¦× ¦Ð , ¦Ç _c ¦Ð decays with?perturbative?QCD?approach

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• 作者：Junfeng Sun ; Dongsheng Du and Yueling Yang
• 关键词：PACS 12.39.St ; 13.25.Hw
• 刊名：The European Physical Journal C - Particles and Fields
• 出版年：2009
• 出版时间：March, 2009
• 年：2009
• 卷：60
• 期：1
• 页码：107-117
• 全文大小：497.7 KB

文摘

The B _c →J/ψ π, η _c π decays are studied with the perturbative QCD approach. It is found that the form factors A_0,1,2B_c? J/yA_{0,1,2}^{B_{c}\to J/{\psi}} and F₀B_c?h_cF_{0}^{B_{c}\to{\eta}_{c}} for the B _c →J/ψ, η _c transitions and the branching ratios are sensitive to the parameters ω, v, f _J/ψ and f_hcf_{{\eta}_{c}} , where ω and v are the parameters of the charmonium wave functions for a Coulomb potential and the harmonic-oscillator potential, respectively, and f _J/ψ and f_hcf_{{\eta}_{c}} are the decay constants of the J/ψ and η _c mesons, respectively. The large branching ratios and the clear signals of the final states make the B _c →J/ψ π, η _c π decays the prospective channels for measurements at the hadron colliders.