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EnglishWe consider the possibility of having a large branching ratio for the decay b --> sg coming from an enhanced Wilson coefficient of the chromomagnetic dipole operator. We show that values of BR(b --> sg) up to similar to 10% or more are compatible with the constraints coming from the CLEO experimental results on BR(B --> X(s) gamma) and BR(B --> X(s) phi). Such large values can reconcile the predictions of both the semileptonic branching ratio and the charm counting with the present experimental results. We also discuss a supersymmetric model with gluino-mediated flavour violations, which can account for such large values of BR(b --> sg).
| Titolo: | The chromomagnetic dipole operator and the B semileptonic branching ratio |
| Autori: | |
| Data di pubblicazione: | 1996 |
| Rivista: | |
| Abstract: | We consider the possibility of having a large branching ratio for the decay b --> sg coming from an enhanced Wilson coefficient of the chromomagnetic dipole operator. We show that values of BR(b --> sg) up to similar to 10% or more are compatible with the constraints coming from the CLEO experimental results on BR(B --> X(s) gamma) and BR(B --> X(s) phi). Such large values can reconcile the predictions of both the semileptonic branching ratio and the charm counting with the present experimental results. We also discuss a supersymmetric model with gluino-mediated flavour violations, which can account for such large values of BR(b --> sg). |
| Handle: | http://hdl.handle.net/11368/2634202 |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/S0370-2693(96)01168-9 |
| Appare nelle tipologie: | 1.1 Articolo in Rivista |
