论文标题
独家非律师BC-Meson腐烂到S-Wave Charmonium州
Exclusive nonleptonic Bc-meson decays to S-wave charmonium states
论文作者
论文摘要
We study the exclusive two-body nonleptonic $B_c\to X_{c\bar{c}}M$ decays, where $X_{c\bar{c}}$ is either a ground(1S) or a radially excited (2S or 3S) charmonium and $M$ is a pseudoscalar $(P)$ or a vector $(V)$ meson.我们在这里考虑三类衰减类别：$ b_c \ to PP，PV，VP $衰减在相对论独立夸克（RIQ）模型的框架内，基于标量谐波和谐波形式中无独立的交互潜力。使用分解近似，我们从RIQ模型中获得的介子波函数的重叠积分计算出弱的形式，并预测了一组与其他模型预测的合理协议中一组独家非律师$ b_c $ - 订单的分支分数。发现某些感兴趣的衰减在当前实验的检测能力中具有分支分数$ \ sim（10^{ - 3} -10^{ - 4}）$，并且可以在不久的将来在LHCB进行精确测量。在最近测量$ b_c \至j/ψπ（k）$，$ b_c \ to j/ψπ（d_s）$，$ b_c \toπ（j/ψ，ψ（2s））$和$ b_c \ to J/ψ（π，μ的$ cly lhc by lhc calliation call cal）之后，$ b_c \ $ b_c \ $ b_c \ to j/ψπ（d_s）$，$ b_c \ r} _ {k/π} $，$ {\ cal r} _ {d_s/π} $和$ {\ cal r} _ {ψ（2S）/{j/ψ}} $与LHCB的广泛一致，尽管我们的lhcb数据与我们所预测的比率$ $ {被低估了。结果表明，当前方法在RIQ模型框架内的独家非Leptonic $ b_c $ -decay的描述中效果很好。
We study the exclusive two-body nonleptonic $B_c\to X_{c\bar{c}}M$ decays, where $X_{c\bar{c}}$ is either a ground(1S) or a radially excited (2S or 3S) charmonium and $M$ is a pseudoscalar $(P)$ or a vector $(V)$ meson. We consider here three categories of decays: $B_c \to PP, PV, VP$ decays within the framework of relativistic independent quark(RIQ) model based on a flavor-independent interaction potential in scalar-vector harmonic form. Using the factorization approximation, we calculate the weak form factors from the overlapping integrals of meson wave functions obtained in the RIQ model and predict the branching fractions for a set of exclusive nonleptonic $B_c$-decays in reasonable agreement with other model predictions. Some of the decays of interest are found to have branching fractions $\sim (10^{-3}-10^{-4})$ within the detection ability of the current experiments and can be precisely measured at LHCb in near future. In the wake of the recent measurement of $B_c\to J/ψπ(K)$, $B_c\to J/ψπ(D_s)$, $B_c\to π(J/ψ,ψ(2S))$ and $B_c\to J/ψ(π,μν)$ reported by the LHCb Collaborations, we predict the ratios: ${\cal R}_{K/π}$, ${\cal R}_{D_s/π}$ and ${\cal R}_{ψ(2S)/{J/ψ}}$ in broad agreement with the LHCb data though our predicted ratio ${\cal R}_{π/{μν}}$ is found to be underestimated. The results indicate that the present approach works well in the description of exclusive nonleptonic $B_c$-decays within the framework of the RIQ model.
