Determining the $\beta$-function of the strong interaction and closing the light gluino window

We discuss the perturbative running of alpha_s in a model independent way. Our analysis contains the data on the hadronic tau decay and all the total hadronic cross sections in e+e- annihilation between 5 GeV and M_Z. We determine the color coefficients and the perturbative beta-function of the stro...

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Detalles Bibliográficos
Autores principales: Csikor, F., Fodor, Z.
Lenguaje:eng
Publicado: 1996
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1103/PhysRevLett.78.4335
http://cds.cern.ch/record/314854
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author Csikor, F.
Fodor, Z.
author_facet Csikor, F.
Fodor, Z.
author_sort Csikor, F.
collection CERN
description We discuss the perturbative running of alpha_s in a model independent way. Our analysis contains the data on the hadronic tau decay and all the total hadronic cross sections in e+e- annihilation between 5 GeV and M_Z. We determine the color coefficients and the perturbative beta-function of the strong interaction. The perturbative approach shows a nice convergence of the confidence level (CL) regions. The results are in agreement with QCD and rule out the QCD+light gluino scenario on the 90% CL. We combine our method with that of the multi-jet analysis at LEP. The combined result rules out light gluinos on the 99% CL.
id cern-314854
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1996
record_format invenio
spelling cern-3148542023-03-14T19:29:37Zdoi:10.1103/PhysRevLett.78.4335http://cds.cern.ch/record/314854engCsikor, F.Fodor, Z.Determining the $\beta$-function of the strong interaction and closing the light gluino windowParticle Physics - PhenomenologyWe discuss the perturbative running of alpha_s in a model independent way. Our analysis contains the data on the hadronic tau decay and all the total hadronic cross sections in e+e- annihilation between 5 GeV and M_Z. We determine the color coefficients and the perturbative beta-function of the strong interaction. The perturbative approach shows a nice convergence of the confidence level (CL) regions. The results are in agreement with QCD and rule out the QCD+light gluino scenario on the 90% CL. We combine our method with that of the multi-jet analysis at LEP. The combined result rules out light gluinos on the 99% CL.We discuss the perturbative running of alpha_s in a model independent way. Our analysis contains data on the hadronic tau decay and hadronic cross sections in e+e- annihilation between 5 GeV and M_Z. We determine the color coefficients and the perturbative beta-function of the strong interaction. The results are in agreement with QCD and rule out the QCD+light gluino scenarios on the 70.8 - 93.0% CL. We combine our method with that of the multi-jet analysis at LEP. The combined result rules out light gluinos at least on the 99.76% CL, provided that nonperturbative effects are not large.hep-ph/9611320CERN-TH-96-323ITP-BUDAPEST-522CERN-TH-96-323ITP-BUDAPEST-522oai:cds.cern.ch:3148541996-11-13
spellingShingle Particle Physics - Phenomenology
Csikor, F.
Fodor, Z.
Determining the $\beta$-function of the strong interaction and closing the light gluino window
title Determining the $\beta$-function of the strong interaction and closing the light gluino window
title_full Determining the $\beta$-function of the strong interaction and closing the light gluino window
title_fullStr Determining the $\beta$-function of the strong interaction and closing the light gluino window
title_full_unstemmed Determining the $\beta$-function of the strong interaction and closing the light gluino window
title_short Determining the $\beta$-function of the strong interaction and closing the light gluino window
title_sort determining the $\beta$-function of the strong interaction and closing the light gluino window
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1103/PhysRevLett.78.4335
http://cds.cern.ch/record/314854
work_keys_str_mv AT csikorf determiningthebetafunctionofthestronginteractionandclosingthelightgluinowindow
AT fodorz determiningthebetafunctionofthestronginteractionandclosingthelightgluinowindow

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