Signals of a superlight gravitino at $e^+ e^-$ colliders when the other superparticles are heavy

If the gravitino G is very light and all the other supersymmetric particles are above threshold, supersymmetry may still be found at colliders, by looking at processes with only gravitinos and ordinary particles in the final state. We compute here the cross-section for the process e^+ e^- ==> G G...

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Detalles Bibliográficos
Autores principales: Brignole, Andrea, Feruglio, Ferruccio, Zwirner, Fabio
Lenguaje:eng
Publicado: 1997
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/S0550-3213(97)00825-0
https://dx.doi.org/10.1016/S0550-3213(99)00389-2
http://cds.cern.ch/record/339698
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author Brignole, Andrea
Feruglio, Ferruccio
Zwirner, Fabio
author_facet Brignole, Andrea
Feruglio, Ferruccio
Zwirner, Fabio
author_sort Brignole, Andrea
collection CERN
description If the gravitino G is very light and all the other supersymmetric particles are above threshold, supersymmetry may still be found at colliders, by looking at processes with only gravitinos and ordinary particles in the final state. We compute here the cross-section for the process e^+ e^- ==> G G gamma, whose final state can give rise to a distinctive photon plus missing energy signal at present and future e^+ e^- colliders. We describe how the present LEP data can be used to establish a lower bound on the gravitino mass of order 10^{-5} eV. We conclude with a critical discussion of our results, comparing them with related ones and outlining possible generalizations.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1997
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spelling cern-3396982023-03-14T19:56:43Zdoi:10.1016/S0550-3213(97)00825-0doi:10.1016/S0550-3213(99)00389-2http://cds.cern.ch/record/339698engBrignole, AndreaFeruglio, FerruccioZwirner, FabioSignals of a superlight gravitino at $e^+ e^-$ colliders when the other superparticles are heavyParticle Physics - PhenomenologyIf the gravitino G is very light and all the other supersymmetric particles are above threshold, supersymmetry may still be found at colliders, by looking at processes with only gravitinos and ordinary particles in the final state. We compute here the cross-section for the process e^+ e^- ==> G G gamma, whose final state can give rise to a distinctive photon plus missing energy signal at present and future e^+ e^- colliders. We describe how the present LEP data can be used to establish a lower bound on the gravitino mass of order 10^{-5} eV. We conclude with a critical discussion of our results, comparing them with related ones and outlining possible generalizations.If the gravitino G is very light and all the other supersymmetric particles are above threshold, supersymmetry may still be found at colliders, by looking at processes with only gravitinos and ordinary particles in the final state. We compute here the cross-section for the process e^+ e^- ==> G G gamma, whose final state can give rise to a distinctive photon plus missing energy signal at present and future e^+ e^- colliders. We describe how the present LEP data can be used to establish a lower bound on the gravitino mass of order 10^{-5} eV. We conclude with a critical discussion of our results, comparing them with related ones and outlining possible generalizations.If the gravitino G̃ is very light and all the other supersymmetric particles are above threshold, supersymmetry may still be found at colliders, by looking at processes with only gravitinos and particles in the final state. We compute here the cross section for the process e + e − → G ̃ G ̃ γ , whose final state can give rise to a distinctive photon plus missing energy signal at present and future e + e − colliders. We describe how the present LEP data can be used to establish a lower bound on the gravitino mass of order 10 −5 eV. We conclude with a critical discussion of our results, comparing them with related ones and outlining possible generalizations.hep-ph/9711516CERN-TH-97-339DFPD-97-TH-52CERN-TH-97-339DFPD-97-TH-52oai:cds.cern.ch:3396981997-12-01
spellingShingle Particle Physics - Phenomenology
Brignole, Andrea
Feruglio, Ferruccio
Zwirner, Fabio
Signals of a superlight gravitino at $e^+ e^-$ colliders when the other superparticles are heavy
title Signals of a superlight gravitino at $e^+ e^-$ colliders when the other superparticles are heavy
title_full Signals of a superlight gravitino at $e^+ e^-$ colliders when the other superparticles are heavy
title_fullStr Signals of a superlight gravitino at $e^+ e^-$ colliders when the other superparticles are heavy
title_full_unstemmed Signals of a superlight gravitino at $e^+ e^-$ colliders when the other superparticles are heavy
title_short Signals of a superlight gravitino at $e^+ e^-$ colliders when the other superparticles are heavy
title_sort signals of a superlight gravitino at $e^+ e^-$ colliders when the other superparticles are heavy
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/S0550-3213(97)00825-0
https://dx.doi.org/10.1016/S0550-3213(99)00389-2
http://cds.cern.ch/record/339698
work_keys_str_mv AT brignoleandrea signalsofasuperlightgravitinoateecolliderswhentheothersuperparticlesareheavy
AT feruglioferruccio signalsofasuperlightgravitinoateecolliderswhentheothersuperparticlesareheavy
AT zwirnerfabio signalsofasuperlightgravitinoateecolliderswhentheothersuperparticlesareheavy

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