6533b857fe1ef96bd12b501c
RESEARCH PRODUCT
Constraining models with vector-like fermions from FCNC in K and B physics
Oscar VivesG. BarenboimG. BarenboimFrancisco J. Botellasubject
PhysicsQuarkNuclear and High Energy PhysicsParticle physicsmedia_common.quotation_subjectHigh Energy Physics::PhenomenologyFOS: Physical sciencesFísicaContext (language use)FermionAsymmetryB-factoryHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)BibliographyCP violationLarge extra dimensionHigh Energy Physics::ExperimentParticle Physics - Phenomenologymedia_commondescription
In this work, we update the constraints on tree level FCNC couplings in the framework of a theory with n isosinglet vector-like down quarks. In this context, we emphasize the sensitivity of the B -> J/psi K_S CP asymmetry to the presence of new vector-like down quarks. This CP asymmetry, together with the rare decays B -> X_{s,d} l bar{l} and K -> pi nu bar{nu} are the best options to further constrain the FCNC tree level couplings or even to point out, in the near future, the possible presence of vector-like quarks in the low energy spectrum, as suggested by GUT theories or models of large extra dimensions at the TeV scale.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2001-05-29 |