R$_{b}$ - R$_{c}$ crisis and new physics

The experimental values of R_b and R_c are the only data which do not seem to agree with Standard Model predictions. Although it is still premature to draw any definite conclusions, it is timely to look for new physics which could explain the excess in R_b and deficit in R_c. We investigate this pro...

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Detalles Bibliográficos
Autores principales: Bhattacharyya, Gautam, Branco, Gustavo C., Hou, Wei-Shu
Lenguaje:eng
Publicado: 1995
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.54.2114
http://cds.cern.ch/record/292535
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author Bhattacharyya, Gautam
Branco, Gustavo C.
Hou, Wei-Shu
author_facet Bhattacharyya, Gautam
Branco, Gustavo C.
Hou, Wei-Shu
author_sort Bhattacharyya, Gautam
collection CERN
description The experimental values of R_b and R_c are the only data which do not seem to agree with Standard Model predictions. Although it is still premature to draw any definite conclusions, it is timely to look for new physics which could explain the excess in R_b and deficit in R_c. We investigate this problem in a simple extension of the Standard Model, where a charge +2/3 isosinglet quark is added to the standard spectrum. Upon the further introduction of an extra scalar doublet, one finds a solution with interesting consequences.
id cern-292535
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1995
record_format invenio
spelling cern-2925352023-03-14T19:56:03Zdoi:10.1103/PhysRevD.54.2114http://cds.cern.ch/record/292535engBhattacharyya, GautamBranco, Gustavo C.Hou, Wei-ShuR$_{b}$ - R$_{c}$ crisis and new physicsParticle Physics - PhenomenologyThe experimental values of R_b and R_c are the only data which do not seem to agree with Standard Model predictions. Although it is still premature to draw any definite conclusions, it is timely to look for new physics which could explain the excess in R_b and deficit in R_c. We investigate this problem in a simple extension of the Standard Model, where a charge +2/3 isosinglet quark is added to the standard spectrum. Upon the further introduction of an extra scalar doublet, one finds a solution with interesting consequences.The experimental values of $R_b$ and $R_c$ are the only data which do not seem to agree with Standard Model predictions. Although it is still premature to draw any definite conclusions, it is timely to look for new physics which could explain the excess in $R_b$ and deficit in $R_c$. We investigate this problem in a simple extension of the Standard Model, where a charge $+2/3$ isosinglet quark is added to the standard spectrum. Upon the further introduction of an extra scalar doublet, one finds a solution with interesting consequences.hep-ph/9512239CERN-TH-95-326FISIST-14-95-CFIFNTUTH-95-11CERN-TH-95-326FISIST-95-14-CFIFNTUTH-95-11oai:cds.cern.ch:2925351995-12-05
spellingShingle Particle Physics - Phenomenology
Bhattacharyya, Gautam
Branco, Gustavo C.
Hou, Wei-Shu
R$_{b}$ - R$_{c}$ crisis and new physics
title R$_{b}$ - R$_{c}$ crisis and new physics
title_full R$_{b}$ - R$_{c}$ crisis and new physics
title_fullStr R$_{b}$ - R$_{c}$ crisis and new physics
title_full_unstemmed R$_{b}$ - R$_{c}$ crisis and new physics
title_short R$_{b}$ - R$_{c}$ crisis and new physics
title_sort r$_{b}$ - r$_{c}$ crisis and new physics
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1103/PhysRevD.54.2114
http://cds.cern.ch/record/292535
work_keys_str_mv AT bhattacharyyagautam rbrccrisisandnewphysics
AT brancogustavoc rbrccrisisandnewphysics
AT houweishu rbrccrisisandnewphysics

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