Year: 1998
Type: preprint
Abstract: We review the B meson lifetime problems and nonspectator effects. The predictions of B meson lifetime ratios depend on four unknown hadronic parameters $B_1$, $B_2$, $ε_1$ and $ε_2$, where $B_1$ and $B_2$ parametrize the matrix elements of color singlet-singlet four-quark operators and $ε_1$ and $ε_2$ the matrix elements of color octet-octet operators. To understand contributions of the nonspectator effects to the B meson lifetime ratios, we derive the renormalization-group improved QCD sum rules for these parameters within the framework of heavy quark effective theory.
Source: arXiv (Cornell University)
Author: Yang, Kwei-Chou
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1665823442