New Approach for Measuring $|V_{ub}|$ at Future $B$-Factories

Abstract

It is suggested that the measurements of hadronic invariant mass ($m_X$) distributons in the inclusive $B\to X_{c(u)}l\nu$ decays can be useful in extracting the CKM matrix element $|V_{ub}|$. We investigated hadronic invariant mass distributions within the various theoretical models of HQET, FAC and chiral lagrangian as well as ACCMM model. It is also emphasized that the $m_X$ distribution even at the region $m_X>m_D$ in the inclusive $b\to u$ are effetive in selecting the events, experimentally viable at the future asymmetric $B$ factories, with better theoretical understandings.

arXiv comment11 pages not including 1 figure

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Cited by in corpus (7)

• Average Kinetic Energy of Heavy Quark and Virial Theorem
• Decay Constants and Semileptonic Decays of Heavy Mesons in Relativistic Quark Model
• Measuring |V_{td} / V_{ub}| through B -> M ν\barν(M=π,K,ρ,K^*) decays
• Average Kinetic Energy of Heavy Quark in Semileptonic B Decay
• A new method of determining $|V_{ub}|$ by the processes $\bar{B}\to \rho l\bar{\nu }$ and $\bar{B} \to K^* l \lbar$
• Analysis of hadronic invariant mass spectrum in inclusive charmless semileptonic B decays
• A New Model-independent Method of Determining |V_{ub}/V_{cb}|