Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-12-09
Physics
High Energy Physics
High Energy Physics - Phenomenology
LATEX, 27 pages,Invited Lecture given at HQ96 "Heavy Quarks at Fixed Target", St. Goar, Germany, Oct. 3 - 6, 1996, one referen
Scientific paper
Inclusive heavy-flavour decays can be described through $1/m_Q$ expansions derived from QCD with the help of an operator product expansion. I sketch their methodology and apply them first to semileptonic B decays; $|V(cb)|$ can be extracted from $\Gamma _{SL}(B)$ and $\bar B \to l \nu D^*$ with the result: $|V(cb)|_{incl} = 0.0413 \pm 0.0016_{exp} \pm 0.002_{theor}$, $|V(cb)|_{excl} = 0.0377 \pm 0.0016_{exp} \pm 0.002_{theor}$. The lifetimes of charm and beauty hadrons are discussed. The charm lifetimes are predicted/reproduced as well as could be expected. Predictions on B meson lifetimes agree with available data; $\Lambda _b$ baryons are predicted to be shorter lived than B_d mesons by no more than ~ 10% - in marked contrast to present measurements. I evaluate the situation and comment on recent theoretical criticism. The importance of the concepts of global vs. local quark-hadron duality is pointed out.
No associations
LandOfFree
Heavy Quark Expansions for Inclusive Heavy-Flavour Decays and the Lifetimes of Charm and Beauty Hadrons does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Heavy Quark Expansions for Inclusive Heavy-Flavour Decays and the Lifetimes of Charm and Beauty Hadrons, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heavy Quark Expansions for Inclusive Heavy-Flavour Decays and the Lifetimes of Charm and Beauty Hadrons will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-633412