Four-fermion interactions and sgoldstino masses in models with a superlight gravitino

We discuss the role of the effective interactions among four matter fermions in supersymmetric models with a very light gravitino. We show that, from a field-theoretical viewpoint, no model-independent bound on the gravitino mass can be derived from such interactions. Making use of a naturalness cri...

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Detalles Bibliográficos
Autores principales: Brignole, Andrea, Feruglio, Ferruccio, Zwirner, Fabio
Lenguaje:eng
Publicado: 1998
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/S0370-2693(98)00974-5
http://cds.cern.ch/record/354504
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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 We discuss the role of the effective interactions among four matter fermions in supersymmetric models with a very light gravitino. We show that, from a field-theoretical viewpoint, no model-independent bound on the gravitino mass can be derived from such interactions. Making use of a naturalness criterion, however, we are able to derive some interesting but not very stringent bounds, complementary to those obtained from the direct production of supersymmetric particles.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1998
record_format invenio
spelling cern-3545042023-03-14T20:37:41Zdoi:10.1016/S0370-2693(98)00974-5http://cds.cern.ch/record/354504engBrignole, AndreaFeruglio, FerruccioZwirner, FabioFour-fermion interactions and sgoldstino masses in models with a superlight gravitinoParticle Physics - PhenomenologyWe discuss the role of the effective interactions among four matter fermions in supersymmetric models with a very light gravitino. We show that, from a field-theoretical viewpoint, no model-independent bound on the gravitino mass can be derived from such interactions. Making use of a naturalness criterion, however, we are able to derive some interesting but not very stringent bounds, complementary to those obtained from the direct production of supersymmetric particles.We discuss the role of the effective interactions among four matter fermions in supersymmetric models with a very light gravitino. We show that, from a field-theoretical viewpoint, no model-independent bound on the gravitino mass can be derived from such interactions. Making use of a naturalness criterion, however, we are able to derive some interesting but not very stringent bounds, complementary to those obtained from the direct production of supersymmetric particles. We also show that, generically, masses for the spin-0 partners of the goldstino (sgoldstinos) of the order of the gravitino mass and much smaller than squark and slepton masses do not obey a naturalness criterion.We discuss the rôle of the effective interactions among four matter fermions in supersymmetric models with a very light gravitino. We show that, from a field-theoretical viewpoint, no model-independent bound on the gravitino mass can be derived from such interactions. Making use of a naturalness criterion, however, we are able to derive some interesting but not very stringent bounds, complementary to those obtained from the direct production of supersymmetric particles. We also show that, generically, masses for the spin-0 partners of the goldstino (sgoldstinos) of the order of the gravitino mass and much smaller than squark and slepton masses do not obey a naturalness criterion.hep-ph/9805282CERN-TH-98-149DFPD-98-TH-20CERN-TH-98-149DFPD-98-TH-20oai:cds.cern.ch:3545041998-05-12
spellingShingle Particle Physics - Phenomenology
Brignole, Andrea
Feruglio, Ferruccio
Zwirner, Fabio
Four-fermion interactions and sgoldstino masses in models with a superlight gravitino
title Four-fermion interactions and sgoldstino masses in models with a superlight gravitino
title_full Four-fermion interactions and sgoldstino masses in models with a superlight gravitino
title_fullStr Four-fermion interactions and sgoldstino masses in models with a superlight gravitino
title_full_unstemmed Four-fermion interactions and sgoldstino masses in models with a superlight gravitino
title_short Four-fermion interactions and sgoldstino masses in models with a superlight gravitino
title_sort four-fermion interactions and sgoldstino masses in models with a superlight gravitino
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/S0370-2693(98)00974-5
http://cds.cern.ch/record/354504
work_keys_str_mv AT brignoleandrea fourfermioninteractionsandsgoldstinomassesinmodelswithasuperlightgravitino
AT feruglioferruccio fourfermioninteractionsandsgoldstinomassesinmodelswithasuperlightgravitino
AT zwirnerfabio fourfermioninteractionsandsgoldstinomassesinmodelswithasuperlightgravitino

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