Speaker
Karim Benakli
(Centre National de la Recherche Scientifique (FR))
Description
Stochastic gravitational waves can be produced during the preheating when out-of-equilibrium particles are produced with an anisotropic stress-tensor. We discuss the case where these particles carry spin 3/2. We compute the spectrum of the gravitational waves generated by the transverse and longitudinal components. We find a different scaling of the spectrum near the peak and the longitudinal components lead to an enhancement when compared to spin-1/2 fermions with Yukawa couplings. We note, as expected, that the corresponding typical frequency is too high for the current observation and calls for ultra-high frequency gravitational wave detectors in the future.
Primary author
Karim Benakli
(Centre National de la Recherche Scientifique (FR))
Co-authors
Yifan Chen
(LPTHE, Paris)
Peng Cheng
Gaëtan Lafforgue-Marmet
