A Few Notes on Non-perturbative Parameters in Heavy Quark Expansion

Abstract

Non-perturbative parameters to the order $\mathcal{O}(\frac{1}{m_Q})$ in HQET expansion, $\bar{\Lambda }$, ${\lambda }_1$ and ${\lambda }_2$, as well as the masses, $m_b$ and $m_c$, are estimated phenomenologically from $B$ and $D$ meson system spectroscopy. We found relatively large value of $m_b$ and quite small value of $\bar{\Lambda }$ compared to previous estimates.

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