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

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

2010-01-06

arxiv.org/abs/1001.0939v2

J.Phys.G38:015002,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 7 figures, version to appear in JPG

Scientific paper

10.1088/0954-3899/38/1/015002

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.

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