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).

The chromomagnetic dipole operator and the B semileptonic branching ratio

GABRIELLI, Emidio;
1996-01-01

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).
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2634202
 Avviso

Registrazione in corso di verifica.
La registrazione di questo prodotto non è ancora stata validata in ArTS.

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 60
  • ???jsp.display-item.citation.isi??? ND
social impact