Tree-level FCNC in the B system: from CP asymmetries to rare decays

Tree-level Flavor-Changing Neutral Currents (FCNC) are characteristic of models with extra vector-like quarks. These new couplings can strongly modify the B^0 CP asymmetries without conflicting with low--energy constraints. In the light of a low CP asymmetry in B --> J/\psi K_{S}, we discuss the...

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Detalles Bibliográficos
Autores principales: Barenboim, G., Botella, F.J., Vives, O.
Lenguaje:eng
Publicado: 2000
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.64.015007
http://cds.cern.ch/record/480977
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author Barenboim, G.
Botella, F.J.
Vives, O.
author_facet Barenboim, G.
Botella, F.J.
Vives, O.
author_sort Barenboim, G.
collection CERN
description Tree-level Flavor-Changing Neutral Currents (FCNC) are characteristic of models with extra vector-like quarks. These new couplings can strongly modify the B^0 CP asymmetries without conflicting with low--energy constraints. In the light of a low CP asymmetry in B --> J/\psi K_{S}, we discuss the implications of these contributions. We find that even these low values can be easily accommodated in these models. Furthermore, we show that the new data from B factories tend to favor an O(20) enhancement of the b --> d l \bar{l} transition over the SM expectation.
id cern-480977
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2000
record_format invenio
spelling cern-4809772023-03-14T18:58:09Zdoi:10.1103/PhysRevD.64.015007http://cds.cern.ch/record/480977engBarenboim, G.Botella, F.J.Vives, O.Tree-level FCNC in the B system: from CP asymmetries to rare decaysParticle Physics - PhenomenologyTree-level Flavor-Changing Neutral Currents (FCNC) are characteristic of models with extra vector-like quarks. These new couplings can strongly modify the B^0 CP asymmetries without conflicting with low--energy constraints. In the light of a low CP asymmetry in B --> J/\psi K_{S}, we discuss the implications of these contributions. We find that even these low values can be easily accommodated in these models. Furthermore, we show that the new data from B factories tend to favor an O(20) enhancement of the b --> d l \bar{l} transition over the SM expectation.Tree-level Flavor-Changing Neutral Currents (FCNC) are characteristic of models with extra vector-like quarks. These new couplings can strongly modify the B^0 CP asymmetries without conflicting with low--energy constraints. In the light of a low CP asymmetry in B --> J/\psi K_{S}, we discuss the implications of these contributions. We find that even these low values can be easily accommodated in these models. Furthermore, we show that the new data from B factories tend to favor an O(20) enhancement of the b --> d l \bar{l} transition over the SM expectation.hep-ph/0012197CERN-TH-2000-376FTUV-00-12-15IFIC-00-82CERN-TH-2000-376FTUV-2000-12IFIC-2000-82oai:cds.cern.ch:4809772000-12-15
spellingShingle Particle Physics - Phenomenology
Barenboim, G.
Botella, F.J.
Vives, O.
Tree-level FCNC in the B system: from CP asymmetries to rare decays
title Tree-level FCNC in the B system: from CP asymmetries to rare decays
title_full Tree-level FCNC in the B system: from CP asymmetries to rare decays
title_fullStr Tree-level FCNC in the B system: from CP asymmetries to rare decays
title_full_unstemmed Tree-level FCNC in the B system: from CP asymmetries to rare decays
title_short Tree-level FCNC in the B system: from CP asymmetries to rare decays
title_sort tree-level fcnc in the b system: from cp asymmetries to rare decays
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1103/PhysRevD.64.015007
http://cds.cern.ch/record/480977
work_keys_str_mv AT barenboimg treelevelfcncinthebsystemfromcpasymmetriestoraredecays
AT botellafj treelevelfcncinthebsystemfromcpasymmetriestoraredecays
AT viveso treelevelfcncinthebsystemfromcpasymmetriestoraredecays

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