Kwei-Chou Yang

collaborators

3 papers

hep-ph1998

Nonspectator Effects and B Meson Lifetimes

Kwei-Chou Yang

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…

hep-ph1998

Updated Analysis of $a_{2} / a_{1}$ in Exclusive B Decays

Hai-Yang Cheng, Kwei-Chou Yang

Using recent experimental data and various theoretical calculations on form factors, we reanalyze the effective parameters $a_{1}$ and $a_{2}$ and their ratio.

hep-ph1998

Isospin Symmetry Breaking in the Quark Condensates, $< d ˉ d > \neq =< u ˉ u >$ , as Estimated from QCD Sum Rules

W-Y. P. Hwang, Kwei-Chou Yang

Isospin symmetry breaking in the quark condensates, $< d ˉ d > \neq =< u ˉ u >$ , is a fundamental parameter in both the QCD sum rule studies and the chiral perturbation theory. I…

Nonspectator Effects and B Meson Lifetimes

Updated Analysis of a2​/a1​ in Exclusive B Decays

Isospin Symmetry Breaking in the Quark Condensates, <dˉd>=<uˉu>, as Estimated from QCD Sum Rules

Updated Analysis of $a_{2} / a_{1}$ in Exclusive B Decays

Isospin Symmetry Breaking in the Quark Condensates, $< d ˉ d > \neq =< u ˉ u >$ , as Estimated from QCD Sum Rules