Testing flavor-changing neutral currents in the rare top quark decays t ->c ViVj - art. no. 115014

Citation
Jl. Diaz-cruz et al., Testing flavor-changing neutral currents in the rare top quark decays t ->c ViVj - art. no. 115014, PHYS REV D, 6011(11), 1999, pp. 5014
Citations number
32
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
0556-2821 → ACNP
Volume
6011
Issue
11
Year of publication
1999
Database
ISI
SICI code
0556-2821(199912)6011:11<5014:TFNCIT>2.0.ZU;2-H
Abstract
We discuss the flavor-changing neutral current (FCNC) decays of the top qua rk t-->cV(i)V(j)(V-i=gamma, Z, g) in the framework of the standard model (S M) and in a two-Higgs-doublet model (2HDM) with tree-level FCNC couplings. While in the SM the expected branching ratios are extremely small, in the 2 HDM they may be sizable, of order 10(-4)-10(-5), and thus accessible at the CERN Large Hadron Collider. We conclude with the interesting observation t hat the FCNC decay modes t-->cV(i)V(j) may not be equally suppressed as the ir corresponding decays t-->cV(i) in this 2HDM. [S0556-2821(99)04521-X].