Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-11-26
Phys.Rev. D61 (2000) 094009
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages, 3 figures, submitted to Phys. Rev. D
Scientific paper
10.1103/PhysRevD.61.094009
The electromagnetic decays of the ground state baryon multiplets with one heavy quark are calculated using Heavy Hadron Chiral Perturbation Theory. The M1 and E2 amplitudes for S^{*}--> S gamma, S^{*} --> T gamma and S --> T gamma are separately computed. All M1 transitions are calculated up to O(1/Lambda_chi^2). The E2 amplitudes contribute at the same order for S^{*}--> S gamma, while for S^{*} --> T gamma they first appear at O(1/(m_Q \Lambda_\chi^2)) and for S --> T gamma are completely negligible. The renormalization of the chiral loops is discussed and relations among different decay amplitudes are derived. We find that chiral loops involving electromagnetic interactions of the light pseudoscalar mesons provide a sizable enhancement of these decay widths. Furthermore, we obtain an absolute prediction for the widths of Xi^{0'(*)}_c--> Xi^{0}_c gamma and Xi^{-'(*)}_b--> Xi^{-}_b gamma. Our results are compared to other estimates existing in the literature.
Banuls Mari Carmen
Pich Antonio
Scimemi Ignazio
No associations
LandOfFree
Electromagnetic Decays of Heavy Baryons 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 Electromagnetic Decays of Heavy Baryons, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electromagnetic Decays of Heavy Baryons will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-618503