We investigate the exclusive semileptonic $B_c\to (D,η_c,B,B_s)\ellν_\ell$, $η_b\to B_c\ellν_\ell$($\ell=e,μ,τ$) decays using the light-front quark model constrained by the variational principle for the QCD motivated effective Hamiltonian. The form factors $f_+(q^2)$ and $f_-(q^2)$ are obtained from the analytic continuation method in the $q^+=0$ frame. While the form factor $f_+(q^2)$ is free from the zero-mode, the form factor $f_-(q^2)$ is not free from the zero-mode in the $q^+=0$ frame. We quantify the zero-mode contributions to $f_-(q^2)$ for various semileptonic $B_c$ decays. Using our effective method to relate the non-wave function vertex to the light-front valence wave function, we incorporate the zero-mode contribution as a convolution of zero-mode operator with the initial and final state wave functions. Our results are then compared to the available experimental data and the results from other theoretical approaches. Since the prediction on the magnetic dipole $B^*_c\to B_c+γ$ decay turns out to be very sensitive to the mass difference between $B^*_c$ and $B_c$ mesons, the decay width $Γ(B^*_c \to B_c γ)$ may help in determining the mass of $B^*_c$ experimentally. Furthermore, we compare the results from the harmonic oscillator potential and the linear potential and identify the decay processes that are sensitive to the choice of confining potential. From the future experimental data on these sensitive processes, one may obtain more realistic information on the potential between quark and antiquark in the heavy meson system.
Radiative corrections to the three-body region of the Dalitz plot of baryon semileptonic decays with angular correlation between polarized emitted baryons and charged leptons: The initial-baryon rest frame case
Precision radiative corrections to the semileptonic Dalitz plot with angular correlation between polarized decaying and emitted baryons: Effects of the four-body region
Precision radiative corrections to the semileptonic Dalitz plot with angular correlation between polarized decaying baryon and emitted charged lepton: Effects of the four-body region
Numerical precision radiative corrections to the Dalitz plot of light and heavy quark unpolarized baryon semileptonic decays. The cases Xi^0 \to Sigma^+ e \barν and Λ_c^+ \to Λe^+ ν
我们提出并讨论了我们以前的精确结果的数值使用非极化自旋二分之一重子半轻子衰变的辐射校正，这是不妥协的固定形状因子在规定的值。我们提出了各种crosscheriches和其他结果的比较，在文献中的这种分析辐射校正。然而，我们的分析是通用的，适用于重夸克允许的重子的所有电荷分配。该过程以过程^+ e \bar v和Λ_c^+ \to Λe^+ v为例。
Precise nondivergent analytic formulas for the radiative corrections to the beta energy spectrum in hyperon semileptonic decays over the entire Dalitz plot
Radiative corrections to the semileptonic Dalitz plot with angular correlation between polarized decaying and emitted hyperons: effects of the four-body region
Radiative corrections to the three-body region of the Dalitz plot of baryon semileptonic decays with angular correlation between polarized emitted baryons and charged leptons
A phenomenological model for radiative corrections in exclusive semileptonic B-meson decays to (pseudo)scalar final state mesons
在$B$ -工厂实验中，次领先阶校正是提取Cabibbo-Kobayashi-Maskawa矩阵元素$|V_{\text{cb}}|$和$|V_{\text{ub}}|$的一个重要方面：虚光子和实光子耦合到衰变的所有带电粒子，改变产生的衰变动力学并提高总衰变率。提出了一个唯象模型和Monte-Carlo方法，研究了半轻子$B$介子衰变到赝标和标量末态的微分和总衰变率的电磁辐射修正，并将其分别应用于$B \to D \, l \, ν$和$B \to π\, l \, ν$以及$B \to D_0^* \, l \, ν$衰变.我们研究这样的修正与点状介子的现象学图片（与一些结构相关的修正），这是有效的，在低能量区域的光子，其结果，我们外推到完整的相空间。最大的可量化不确定性是由于与标准模型的近似匹配。此外，未知的结构依赖性贡献和模型依赖性可能会对我们的研究结果产生影响。
Precision radiative corrections to the Dalitz plot of baryon semileptonic decays including the spin-momentum correlation of the decaying baryon and the emitted charged lepton
Numerical analysis of the production of $D^{(*)}(3000)$, $D_{sJ}(3040)$ and their partners through the semileptonic decays of $B_{(s)}$ mesons in terms of the light-front quark model
Numerical precision radiative corrections to the Dalitz plot of baryon semileptonic decays including the spin-momentum correlation of the decaying and emitted baryons
A two-loop relation between inclusive radiative and semileptonic B-decay spectra
本文导出了部分B->X_u+l+nu衰变率与P_+=E_X-P_<Delta and a weighted integral over the normalized B->XX_s+ γ光子能谱截点之间的形状函数无关关系。在重正化群改进的微扰理论中，在次-次-首阶计算了首项功率对权函数的贡献，包括在尺度μ_i^2 ~ m_b* Lambda_{QCD}下的精确双环匹配修正.权重函数的整体归一化可以在[alpha_s（m_b）]^2阶修正未知的情况下得到。从相空间因子的功率校正被准确地包括，而其余的子领先的贡献被包括在1/m_b的一阶。在这个水平上，不可避免的强子不确定性进入，这是保守的方式估计。在萃取过程中，|V_{ub}|如果可以通过实验获得接近魅力阈值的Delta值，则该值处于5%的水平。
The Semileptonic B Frontier: LHC, B-factories, Lattice QCD & the Hunt for Precision
INFN, Sezione di Bari（意大利国家核物理研究所巴里分部）；Laboratori Nazionali di Frascati（弗拉斯卡蒂国家实验室）；PRISMA ++ Cluster of Excellence & Mainz Institute for Theoretical Physics, Johannes Gutenberg University（约翰内斯·古腾堡大学）；ICCUB, Universitat de Barcelona（巴塞罗那大学）；Department of Physics and Astronomy, University of Manchester（曼彻斯特大学）；Aix Marseille Univ, CNRS/IN2P3, CPPM（艾克斯-马赛大学）；Dipartimento di Fisica e Astronomia Galileo Galilei & INFN, Università di Padova（帕多瓦大学）；Dipartimento di Fisica & INFN, Università di Torino（都灵大学）；INFN, Sezione di Roma Tre（意大利国家核物理研究所罗马第三大学分部）
Consistent treatment for valence and nonvalence configurations in semileptonic weak deacys
讨论了$P\to P$（$P$表示赝标介子）的半轻子弱衰变.在这些类时过程中，系统地解决了非价贡献问题以及价贡献问题。这些贡献与光阵面夸克模型（LFQM）有关，数值结果表明，光-光跃迁的非价贡献大于重-光跃迁的非价贡献。此外，计算了相关的CKM矩阵元素。与Particle Data Group的数据一致。
