Work

Thermal production of gravitinos

Year: 2007

Type: article

Abstract: We reconsider thermal production of gravitinos in the early universe, adding to previously considered $2\ensuremath{\rightarrow}2$ gauge scatterings: (a) production via $1\ensuremath{\rightarrow}2$ 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.

Source: Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields

DOI: 10.1103/physrevd.75.075011

Authors: Vyacheslav S. Rychkov, Alessandro Strumia

Institutions: Scuola Normale Superiore, University of Pisa, Istituto Nazionale di Fisica Nucleare, Istituto Nazionale di Fisica Nucleare, Sezione di Pisa

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W2149169382

FWCI: 13.5

Cites: 67

Cited by: 343

Related to: 10