Perturbative QCD calculation for Λb→Λγ in the standard model
Abstract
We calculate the branching ratio of Λb→Λγ in the standard model using the PQCD method. The predicted branching ratio B(Λb→Λγ) is about (4.3∼8.6)×10-8, with reasonable parameter ranges in the heavy baryon distribution amplitude. This branching ratio is much smaller than those obtained in other hadronic model calculations. Future experimental data can provide important information on applicability of the PQCD method to heavy baryon radiative decay.
- Publication:
-
Physical Review D
- Pub Date:
- August 2006
- DOI:
- arXiv:
- arXiv:hep-ph/0606025
- Bibcode:
- 2006PhRvD..74c4026H
- Keywords:
-
- 13.30.Ce;
- 12.38.Bx;
- 14.20.Mr;
- Leptonic semileptonic and radiative decays;
- Perturbative calculations;
- Bottom baryons;
- High Energy Physics - Phenomenology
- E-Print:
- 12 pages, 1 figure and 5 tables. Replaced by new version