Constraining models with vector-like fermions from FCNC in K and B physics

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Barenboim, G., Botella, F.J., Vives, O.
Lenguaje:eng
Publicado: 2001
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/S0550-3213(01)00390-X
http://cds.cern.ch/record/501916
_version_ 1780897273800032256
author Barenboim, G.
Botella, F.J.
Vives, O.
author_facet Barenboim, G.
Botella, F.J.
Vives, O.
author_sort Barenboim, G.
collection CERN
description 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.
id cern-501916
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2001
record_format invenio
spelling cern-5019162023-03-14T16:59:21Zdoi:10.1016/S0550-3213(01)00390-Xhttp://cds.cern.ch/record/501916engBarenboim, G.Botella, F.J.Vives, O.Constraining models with vector-like fermions from FCNC in K and B physicsParticle Physics - PhenomenologyIn 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.In this work, we update the constraints on tree level FCNC couplings in the framework of a theory with $\eta$ isosinglet vector-like down quarks. In this context, we emphasize the sensitivity of the $B \to J/\psi K_S CP$ asymmetry to the presence of new vector-like down quarks. This CP asymmetry, together with the rare decays $B \to X_{s,d} l \bar{l}$ and $K \to \pi \nu \bar{\nu}$ 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.hep-ph/0105306FERMILAB-PUB-01-077-TFTUV-01-05-29IFIC-01-28IFIC-2001-28oai:cds.cern.ch:5019162001-05-29
spellingShingle Particle Physics - Phenomenology
Barenboim, G.
Botella, F.J.
Vives, O.
Constraining models with vector-like fermions from FCNC in K and B physics
title Constraining models with vector-like fermions from FCNC in K and B physics
title_full Constraining models with vector-like fermions from FCNC in K and B physics
title_fullStr Constraining models with vector-like fermions from FCNC in K and B physics
title_full_unstemmed Constraining models with vector-like fermions from FCNC in K and B physics
title_short Constraining models with vector-like fermions from FCNC in K and B physics
title_sort constraining models with vector-like fermions from fcnc in k and b physics
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/S0550-3213(01)00390-X
http://cds.cern.ch/record/501916
work_keys_str_mv AT barenboimg constrainingmodelswithvectorlikefermionsfromfcncinkandbphysics
AT botellafj constrainingmodelswithvectorlikefermionsfromfcncinkandbphysics
AT viveso constrainingmodelswithvectorlikefermionsfromfcncinkandbphysics

Ejemplares similares