The Semileptonic $B$ to $K_1(1270,1400)$ Decays in QCD Sum Rules

Abstract

We analyze the semileptonic rare decays of $B$ meson to $K_1(1270)$ and $K_1(1400)$ axial vector mesons. The $B\to K_1(1270,1400){\ell }^{+}{\ell }^{-}$ decays are significant flavor changing neutral current decays of the $B$ meson. These decays are sensitive to the new physics beyond SM, since these processes are forbidden at tree level at SM. These decays occurring at the quark level via $b\to s{\ell }^{+}{\ell }^{-}$ transition, also provide new opportunities for calculating the CKM matrix elements $V_{bt}$ and $V_{ts}$. In this study, the transition form factors of the $B\to K_1(1270,1400){\ell }^{+}{\ell }^{-}$ decays are calculated using three-point QCD sum rules approach. The resulting form factors are used to estimate the branching fractions of these decays.

18 pages, 7 figures, version to appear in JPG

References in corpus (8)

• Light-Cone Distribution Amplitudes of Axial-vector Mesons
• $B\to K_1\gamma$ Decays in the Light-Cone QCD Sum Rules
• Form Factors of $B_{u,d,s}$ Decays into P-Wave Axial-Vector Mesons in the Light-Cone Sum Rule Approach
• Exclusive B-> K_{1}l ^{+}l ^{-} decay in model with single universal extra dimension
• Form factors, branching ratio and forward-backward asymmetry in B -> K_{1}ell ^{+} ell ^{-} decays
• Lepton polarization in $B\to K_1{\ell }^{+}{\ell }^{-}$ Decays
• Radiative $B\to K_1$ decays in the light-cone sum rules
• $B\to K_1(1270)(\to \rho K){\ell }^{+}{\ell }^{-}$ in LEET

Cited by in corpus (4)

• B -> K1 l^+l^- Decays in a Family Non-universal Z' Model
• Analysis of the semileptonic $B\to K_1{\ell }^{+}{\ell }^{-}$transitions and non-leptonic $B\to K_1\gamma$ decay in the AdS/QCD correspondence
• Next-to-leading-order QCD calculations of $B\to A$ form factors with higher-twist corrections
• Double-Lepton Polarization Asymmetries in B->K_1 l^+ l^- Decay in Universal Extra Dimension Model