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arXiv · hep-ph/9401246

Phenomenological Constraints on $\barΛ$ and $λ_1$

Zoltan Ligeti·Yosef Nir
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Abstract

Combining the experimental data on the inclusive decays $D\to X\,e\,ν$, $B\to X\,e\,ν$ and $B\to X\,τ\,ν$, we find severe constraints on the $\barΛ$ and $λ_1$ parameters of the Heavy Quark Effective Theory. In particular, we get $\barΛ<0.7\,$GeV. Our constraints further imply $m_c\geq1.43\,$GeV and $m_b\geq4.66\,$GeV. We discuss future prospects of improving these bounds and their phenomenological implications.

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Zoltan Ligeti, Yosef Nir. 1994-01-13. Phenomenological Constraints on $\barΛ$ and $λ_1$. https://doi.org/10.1103/physrevd.49.r4331

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