Semileptonic $B(B_s,B_c)$ decays in the light-cone QCD sum rules

Abstract

Semileptonic $B$($B_s,B_c$) decays are investigated systematically in the light-cone QCD sum rules. Special emphasis is put on the LCSR calculation on weak form factors with an adequate chiral current correlator, which turns out to be particularly effective to control the pollution by higher twist components of spectator mesons. The result for each channel depends on the distribution amplitude of the the producing meson. The leading twist distribution amplitudes of the related heavy mesons and charmonium are worked out by a model approach in the reasonable way. A practical scenario is suggested to understand the behavior of weak form factors in the whole kinematically accessible ranges. The decay widths and branching ratios are estimated for several $B$($B_c$) decay modes of current interest.

8 pages, talk given by the first arthur at 4th International Conference on Flavor Physics (ICFP 2007), Beijing, China, Sept 24-28, 2007

References in corpus (12)

• Dispersive Bounds on the Shape of B -> D^(*) l nu Form Factors
• Exclusive Semileptonic and Rare B-Meson Decays in QCD
• The $\rho$ Meson Light-Cone Distribution Amplitudes of Leading Twist Revisited
• The semileptonic decays of the B_c meson
• $B\to D^{(\ast )}$ form factors in perturbative QCD
• The $\rho$-meson and related meson wave functions in QCD sum rules with nonlocal condensates
• Semileptonic $B_c$ decays and Charmonium distribution amplitude
• Observation of b --> d gamma and Determination of |V_td/V_ts|
• $B-\pi$ weak form factor with chiral current in the light-cone sum rules
• Consistent Analysis of the $B\to \pi$ Transition Form Factor in the Whole Physical Region
• $B\to K$ Transition Form Factor up to $\mathcal{O}(1/m_b^2)$ within the $k_T$ Factorization Approach
• A New Estimate of $B\to (\rho ,\omega )+\gamma$ In The Light-Cone QCD Sum Rule

Cited by in corpus (23)

• Estimation of Semileptonic Decays of $B_c$ Meson to S-wave Charmonia with NRQCD
• Radiative Corrections on the $B\to P$ Form Factors with Chiral Current in the Light-Cone Sum Rules
• Light hadron production in $B_c\to J/\psi +X$ decays
• Determination of the pion distribution amplitude
• QCD corrections to the $B_c$ to charmonia semi-leptonic decays
• Heavy Pseudoscalar Leading-Twist Distribution Amplitudes within QCD Theory in Background Fields
• $B\to \rho$ transition form factors within the QCD light-cone sum rules and the $\rho$-meson leading-twist distribution amplitude
• $B\to K^{\ast }$ Transition Form Factors and the Semi-leptonic Decay $B\to K^{\ast }{\mu }^{+}{\mu }^{-}$
• Radiative Leptonic $B_c\to \gamma \ell \bar{\nu }$ Decay in Effective Field Theory beyond Leading Order
• Finding a way to determine the pion distribution amplitude from the experimental data
• Investigating the ratio of CKM matrix elements $|V_{ub}|/|V_{cb}|$ from semileptonic decay $B_s^0\to K^{-}{\mu }^{+}{\nu }_{\mu }$ and kaon twist-2 distribution amplitude
• The Electromagnetic Decays of $B_c^{\pm }(2S)$
• New results on Pionic Twist-3 Distribution Amplitudes within the QCD Sum Rules
• Higher order light-cone distribution amplitudes of the Lambda baryon
• Semileptonic $B_c^{-}\to D^{\ast 0}\ell \nu$ transition in three--point QCD sum rules and HQET with gluon condensate corrections
• Heavy Pseudoscalar Twist-3 Distribution Amplitudes within QCD Theory in Background Fields
• Measurement of the $B_c^{\pm }$ production cross section in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV
• The $B\to \rho$ helicity form factors within the QCD light-cone sum rules
• Light hadron production in $B_c\to B_s^{(\ast )}+X$ decays
• $B_c^{+}$ Formation from Random Charm and Anti-bottom Quarks in the Quark-Gluon Plasma
• $D\to P(\pi ,K)$ helicity form factors within light-cone sum rule approach
• Study of the $B_c$ $\to$ $B_s\pi$ decay with the perturbative QCD approach
• Analysis of the form factors of $B_c\to D^{(\ast )}$, $D_s^{(\ast )}$ and their nonleptonic decays