Spectator effects and lifetimes of heavy hadrons
Abstract
We present a calculation of subleading 1/mb corrections to spectator effects in the ratios of beauty hadron lifetimes in heavy-quark expansion. We find that these effects are sizable and should be taken into account in systematic analyses of heavy hadron lifetimes. In particular, the inclusion of 1/mb corrections brings into agreement the theoretical predictions and experimental observations of the ratio of lifetimes of Λb baryon and Bd meson. We obtain τ(Bu)/τ(Bd)=1.06±0.02, τ(Bs)/τ(Bd)=1.00±0.01, τ(Λb)/τ(Bd)=0.86±0.05.
- Publication:
-
Physical Review D
- Pub Date:
- November 2004
- DOI:
- 10.1103/PhysRevD.70.094031
- arXiv:
- arXiv:hep-ph/0407004
- Bibcode:
- 2004PhRvD..70i4031G
- Keywords:
-
- 12.39.Hg;
- 13.25.Hw;
- 13.30.Eg;
- Heavy quark effective theory;
- Decays of bottom mesons;
- Hadronic decays;
- High Energy Physics - Phenomenology;
- High Energy Physics - Experiment
- E-Print:
- 20 pages, 8 figures