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Title: Thermal production of gravitinos

Abstract

We reconsider thermal production of gravitinos in the early universe, adding to previously considered 2{yields}2 gauge scatterings: (a) production via 1{yields}2 decays, allowed by thermal masses: this is the main new effect, (b) the effect of the top Yukawa coupling, and (c) a proper treatment of the reheating process. Our final result behaves physically (larger couplings give a larger rate) and is twice larger than previous results, implying e.g. a constraint on the reheating temperature that is twice as strong. Accessory results about (supersymmetric) theories at finite temperature and gravitino couplings might have some pertinence.

Authors:
 [1];  [2]
  1. Scuola Normale Superiore and INFN, Piazza dei Cavalieri 7, I-56126 Pisa (Italy)
  2. Dipartimento di Fisica dell'Universita di Pisa and INFN (Italy)
Publication Date:
OSTI Identifier:
21020305
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.75.075011; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; GRAVITONS; PARTICLE DECAY; PARTICLE PRODUCTION; REST MASS; SCATTERING; SPARTICLES; SUPERSYMMETRY; UNIVERSE; YUKAWA POTENTIAL

Citation Formats

Rychkov, Vyacheslav S., and Strumia, Alessandro. Thermal production of gravitinos. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.075011.
Rychkov, Vyacheslav S., & Strumia, Alessandro. Thermal production of gravitinos. United States. doi:10.1103/PHYSREVD.75.075011.
Rychkov, Vyacheslav S., and Strumia, Alessandro. Sun . "Thermal production of gravitinos". United States. doi:10.1103/PHYSREVD.75.075011.
@article{osti_21020305,
title = {Thermal production of gravitinos},
author = {Rychkov, Vyacheslav S. and Strumia, Alessandro},
abstractNote = {We reconsider thermal production of gravitinos in the early universe, adding to previously considered 2{yields}2 gauge scatterings: (a) production via 1{yields}2 decays, allowed by thermal masses: this is the main new effect, (b) the effect of the top Yukawa coupling, and (c) a proper treatment of the reheating process. Our final result behaves physically (larger couplings give a larger rate) and is twice larger than previous results, implying e.g. a constraint on the reheating temperature that is twice as strong. Accessory results about (supersymmetric) theories at finite temperature and gravitino couplings might have some pertinence.},
doi = {10.1103/PHYSREVD.75.075011},
journal = {Physical Review. D, Particles Fields},
number = 7,
volume = 75,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2007},
month = {Sun Apr 01 00:00:00 EDT 2007}
}