Role of Four-Quark Operators in the Inclusive $Î_b$ Decays
arXiv:hep-ph/9604425 · doi:10.1016/0370-2693(96)01049-0
Abstract
We compute by QCD sum rules the matrix elements of the relevant four-quark operators appearing in the expression of the $Î_b$ inclusive decay rates at the order $1/m_b^3$. The results suggest that $1/m_b^3$ corrections are not responsible of the observed difference between the lifetime of $Î_b$ and $B_d$.
LaTex, 14 pages, 3 uuencoded postscript figures