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Sparticle Masses from the Superconformal Anomaly

We discuss a recently proposed scenario where the sparticle masses are purely mediated by gravity through the superconformal anomaly. This scenario elegantly evades the supersymmetric flavor problem since soft masses, like the anomaly, are not directly sensitive to ultraviolet physics. However, its...

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Detalles Bibliográficos
Autores principales: Pomarol, Alex, Rattazzi, Riccardo
Lenguaje:eng
Publicado: 1999
Materias:
Acceso en línea:https://dx.doi.org/10.1088/1126-6708/1999/05/013
http://cds.cern.ch/record/382565
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author Pomarol, Alex
Rattazzi, Riccardo
author_facet Pomarol, Alex
Rattazzi, Riccardo
author_sort Pomarol, Alex
collection CERN
description We discuss a recently proposed scenario where the sparticle masses are purely mediated by gravity through the superconformal anomaly. This scenario elegantly evades the supersymmetric flavor problem since soft masses, like the anomaly, are not directly sensitive to ultraviolet physics. However, its minimal incarnation fails by predicting tachyonic sleptons. We study the conditions for decoupling of heavy threshold effects and how these conditions are evaded. We use these results to build a realistic class of models where the non-decoupling effects of ultra-heavy vectorlike matter fields eliminate the tachyons. These models have a flavor invariant superspectrum similar to that of gauge mediated models. They, however, differ in several aspects: the gaugino masses are not unified, the colored sparticles are not much heavier than the others, the mu-problem is less severe and the gravitino mass is well above the weak scale, m_{3/2} \sim 10 TeV. We also show that in models where an R-symmetry can be gauged, the associated D-term gives rise to soft terms that are similarly insensitive to the ultraviolet.
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publishDate 1999
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spelling cern-3825652023-03-14T16:59:06Zdoi:10.1088/1126-6708/1999/05/013http://cds.cern.ch/record/382565engPomarol, AlexRattazzi, RiccardoSparticle Masses from the Superconformal AnomalyParticle Physics - PhenomenologyWe discuss a recently proposed scenario where the sparticle masses are purely mediated by gravity through the superconformal anomaly. This scenario elegantly evades the supersymmetric flavor problem since soft masses, like the anomaly, are not directly sensitive to ultraviolet physics. However, its minimal incarnation fails by predicting tachyonic sleptons. We study the conditions for decoupling of heavy threshold effects and how these conditions are evaded. We use these results to build a realistic class of models where the non-decoupling effects of ultra-heavy vectorlike matter fields eliminate the tachyons. These models have a flavor invariant superspectrum similar to that of gauge mediated models. They, however, differ in several aspects: the gaugino masses are not unified, the colored sparticles are not much heavier than the others, the mu-problem is less severe and the gravitino mass is well above the weak scale, m_{3/2} \sim 10 TeV. We also show that in models where an R-symmetry can be gauged, the associated D-term gives rise to soft terms that are similarly insensitive to the ultraviolet.We discuss a recently proposed scenario where the sparticle masses are purely mediated by gravity through the superconformal anomaly. This scenario elegantly evades the supersymmetric flavor problem since soft masses, like the anomaly, are not directly sensitive to ultraviolet physics. However, its minimal incarnation fails by predicting tachyonic sleptons. We study the conditions for decoupling of heavy threshold effects and how these conditions are evaded. We use these results to build a realistic class of models where the non-decoupling effects of ultra-heavy vectorlike matter fields eliminate the tachyons. These models have a flavor invariant superspectrum similar to that of gauge mediated models. They, however, differ in several aspects: the gaugino masses are not unified, the colored sparticles are not much heavier than the others, the mu-problem is less severe and the gravitino mass is well above the weak scale, m_{3/2} \sim 10 TeV. We also show that in models where an R-symmetry can be gauged, the associated D-term gives rise to soft terms that are similarly insensitive to the ultraviolet.hep-ph/9903448CERN-TH-99-73SNS-PH-99-03CERN-TH-99-073SNS-PH-99-03oai:cds.cern.ch:3825651999-03-23
spellingShingle Particle Physics - Phenomenology
Pomarol, Alex
Rattazzi, Riccardo
Sparticle Masses from the Superconformal Anomaly
title Sparticle Masses from the Superconformal Anomaly
title_full Sparticle Masses from the Superconformal Anomaly
title_fullStr Sparticle Masses from the Superconformal Anomaly
title_full_unstemmed Sparticle Masses from the Superconformal Anomaly
title_short Sparticle Masses from the Superconformal Anomaly
title_sort sparticle masses from the superconformal anomaly
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1088/1126-6708/1999/05/013
http://cds.cern.ch/record/382565
work_keys_str_mv AT pomarolalex sparticlemassesfromthesuperconformalanomaly
AT rattazziriccardo sparticlemassesfromthesuperconformalanomaly