Thermal production of gravitinos

By V. Rychkov, Alessandro Strumia. 2007

429 citations recorded by the source corpus.

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.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/4fde09277f33e70ac1acecf34b2ab0dd36259482

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Citations in the corpus

Lyman-alpha constraints on warm and on warm-plus-cold dark matter models (2008, background): “[73, 74, 75]), and then non-thermally through the late decay of the next-tolightest supersymmetric particle (see e.”
Leptogenesis (2008, neutral): “Supersymmetric thermal leptogenesis has a potential gravitino problem [76,77,79,80].”
Non-Thermal Dark Matter and the Moduli Problem in String Frameworks (2008, background): “In supersymmetric extensions of the standard model, the overproduction of gravitinos can cause similar problems and have been a source of much investigation [6–19].”
Cosmological bounds on pseudo Nambu-Goldstone bosons (2011, background): “The rate of ALP production due to scattering on relativistic electrons was computed in [14] to be”
Reheating in Inflationary Cosmology: Theory and Applications (2010, background): “The resulting abundance is found to be [86, 87]”
Thermal production of ultrarelativistic right-handed neutrinos: complete leading-order results (2012, neutral): “Here we proceed slightly differently from [31, 32, 33, 34, 35].”
WIMP dark matter candidates and searches—current status and future prospects (2017, methodology): “ticle mass or the reheating temperature T R). This greatly relaxes the standard thermal WIMP paradigm, as has been shown in the case of axinos [64,65,80] (for a recent review see [81]) and gravitinos [59,62,63] both of which belong to the class of EWIMPs. In contrast, if h˙ annv M˝li f is larger tha”
Dark matter and the early Universe: A review (2021, background): “There however exists another contribution to the gravitino relic density which comes from the scattering at high energy of the other supersymmetric particles in the early Universe thermal bath after inflation, which amounts to [155, 156]”
Dark Matter Candidates from Particle Physics and Methods of Detection (2010, background): “For gravitino mass mG̃ ∼ 100 GeV, the constraint on ΩDM requires TR < ∼ 10(10) GeV (132).”
Dark photon dark matter produced by axion oscillations (2018, neutral): “[45] V.”
Thermal axion production (2013, background): “We followed the method provided in [28].”
A lower bound on the mass of dark matter particles (2008, background): “[91, 92]) accompanied by non-thermal production via late decays of next-to-lightest supersymmetric particles (see e.”