Form Factors and semileptonic decay of $D_s^+\to φ\bar{\ell}ν$ from QCD sum rule

Details Form Factors and semileptonic decay of $D_s^+\to φ\bar{\ell}ν$ from QCD sum rule Form Factors and semileptonic decay of $D_s^+\to φ\bar{\ell}ν$ from QCD sum rule

2003-08-26

arxiv.org/abs/hep-ph/0308259v3

Eur.Phys.J. C37 (2004) 173-184

Physics

High Energy Physics

High Energy Physics - Phenomenology

version to appear in Eur.Phys.J.C

Scientific paper

10.1140/epjc/s2004-01979-9

We calculate $D_s^+\to \phi$ transition form factors $V$, $A_0$, $A_1$ and $A_2$, and study semileptonic decay of $D_s^+\to \phi \bar{\ell}\nu$ based on QCD sum rule method. We compare our results of the ratios of $V(0)/A_1(0)$, $A_2(0)/A_1(0)$, $\Gamma_L/\Gamma_T$, and the total decay branching ratio of $D_s^+\to \phi \bar{\ell}\nu$ with experimental data, and find that they are consistent.

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