A study of semi-inclusive charmless $B \to πX$ decays

Details A study of semi-inclusive charmless $B \to πX$ decays A study of semi-inclusive charmless $B \to πX$ decays

2002-03-09

arxiv.org/abs/hep-ph/0203093v2

Eur.Phys.J.C25:413-419,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 7 figures; Revtex; version accepted for publication in Eur. Phys. J. C

Scientific paper

10.1007/s10052-002-1020-0

We study semi-inclusive charmless decays $B \to \pi X$ in detail, such as $\bar B^0 \to \pi^{\pm (0)} X$, $B^0 \to \pi^{\pm (0)} X$, $B^{\pm} \to \pi^{\pm (0)} X$, where $X$ does not contain a charm (anti)quark. We find that the process $\bar B^0 \to \pi^- X$ ($B^0 \to \pi^+ X$) can be particularly useful for determination of the CKM matrix element $|V_{ub}|$. We calculate and present the branching ratio (BR) of $\bar B^0 \to \pi^- X$ as a function of $|V_{ub}|$, with an estimate of possible uncertainties. It is expected that the BR is an order of $10^{-4}$. Our estimation indicates that one can phenomenologically determine $|V_{ub}|$ with reasonable accuracy by measuring the BR of $\bar B^0 \to \pi^- X$ ($B^0 \to \pi^+ X$).

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