Slow and safe gravitinos
Entity
UAM. Departamento de Física TeóricaPublisher
American Physical SocietyDate
2021-06-09Citation
10.1103/PhysRevD.103.123519
Physical Review D 103.12 (12): 123519
ISSN
2470-0010 (print); 2470-0029 (online)DOI
10.1103/PhysRevD.103.123519Project
info:eu-repo/grantAgreement/EC/H2020/860881/EU//HIDDeN; Gobierno de España. FPA2015-65929-P; Gobierno de España. PGC2018-095161-B-I00; Gobierno de España. SEV-2016-0597; Gobierno de España. FPA2017-90566-REDCEditor's Version
https://doi.org/10.1103/PhysRevD.103.123519Subjects
Gravitinos; Dark Matter; Colliding Beam Accelerators; FísicaRights
© 2021 authorsAbstract
It has been argued that supergravity models of inflation with vanishing sound speeds, cs, lead to an unbounded growth in the production rate of gravitinos. We consider several models of inflation to delineate the conditions for which cs = 0. In models with unconstrained superfields, we argue that the mixing of the Goldstino and inflatino in a time-varying background prevents the uncontrolled production of the longitudinal modes. This conclusion is unchanged if there is a nilpotent field associated with supersymmetry breaking with constraint S2 = 0, i.e., (s)Goldstino-less models. Models with a second orthogonal constraint, S(φ-φ¯) = 0, where φ is the inflaton superfield, which eliminates the inflatino, may suffer from the overproduction of gravitinos. However, we point out that these models may be problematic if this constraint originates from a UV Lagrangian, as this may require using higher derivative operators. These models may also exhibit other pathologies, such as cs > 1, which are absent in theories with the single constraint or unconstrained fields
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Google Scholar:Dudas, Emilian
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García García, Marcos Alejandro
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Mambrini, Yann
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Olive, Keith A.
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Peloso, Marco
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Verner, Sarunas
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