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Article Dans Une Revue JCAP Année : 2024

Double-graviton production from Standard Model plasma

M Laine
  • Fonction : Auteur
J Schütte-Engel
  • Fonction : Auteur
E Speranza
  • Fonction : Auteur

Résumé

The thermal plasma filling the early universe generated a stochastic gravitational wave background that peaks in the microwave frequency range today. If the graviton production rate is expressed as a series in a fine-structure constant, $\alpha$, and the temperature over the Planck mass, $T^2_{ } / m_{\rm pl}^2$, then the lowest-order contributions come from single ($\sim \alpha T^2_{ }/m_{\rm pl}^2$) and double ($\sim T^4_{ }/m_{\rm pl}^4$) graviton production via $2\to 2$ scatterings. We show that in the Standard Model, single-graviton production dominates if the maximal temperature is smaller than $4\times 10^{18}_{ }$ GeV. This justifies previous calculations which relied solely on single-graviton production. We mention Beyond the Standard Model scenarios in which the single and double-graviton contributions could be of comparable magnitudes. Finally, we elaborate on what these results imply for the range of applicability of General Relativity as an effective theory.

Dates et versions

hal-04409355 , version 1 (22-01-2024)

Identifiants

Citer

J Ghiglieri, M Laine, J Schütte-Engel, E Speranza. Double-graviton production from Standard Model plasma. JCAP, 2024, 04, pp.062. ⟨10.1088/1475-7516/2024/04/062⟩. ⟨hal-04409355⟩
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