$|V_{ub}|$ determination by $B \to D_s π$

Details $|V_{ub}|$ determination by $B \to D_s π$ $|V_{ub}|$ determination by $B \to D_s π$

2002-12-06

arxiv.org/abs/hep-ph/0212095v1

Mod.Phys.Lett. A18 (2003) 1557

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 3 figures, LaTeX2e with graphics package

Scientific paper

10.1142/S021773230301137X

We investigate $\ovar{B^0} \to D_s^- \pi^+$ decay in perturbative QCD approach which has recently been applied to $B$ meson decays. $\ovar{B^0} \to D_s^- \pi^+$ decay (and its charge conjugated mode) can be one of the hopeful modes to determine $|V_{ub}|$ since it occurs through $b \to u$ transition only. We estimate both factorizable and non-factorizable contribution, and show that the non-factorizable contribution is much less than the factorizable one. Our calculation gives ${BR}(\ovar{B^0} \to D_s^- \pi^+) = (50 \sim 70) \times f_{Ds}^2|{V_{ub}}{V_{cs}}|^2$.

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