2024-03-28T21:06:33Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/332172017-01-16T09:55:50Zcom_10261_61com_10261_4col_10261_314
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Bañuls Polo, M. Carmen
author
Pich, Antonio
author
Scimemi, Ignazio
author
2000
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*→Sγ, S*→Tγ and S⃗Tγ are separately computed. All M1 transitions are calculated up to O(1/Λχ2). The E2 amplitudes contribute at the same order for S*→Sγ, while for S*→Tγ they first appear at O(1/(mQΛχ2)) and for S⃗Tγ 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 Γ(Ξc0′(*)→Ξc0γ) and Γ(Ξb-′(*)→Ξb-γ). Our results are compared to other estimates existing in the literature.
Physical review D 61(9): 094009 (2000)
0556-2821
http://hdl.handle.net/10261/33217
10.1103/PhysRevD.61.094009
Electromagnetic decays of heavy baryons