Gravitational waves from spin-3/2 fields — Hunting SUSY in the sky. (arXiv:1811.11774v1 [hep-ph])
<a href="http://arxiv.org/find/hep-ph/1/au:+Benakli_K/0/1/0/all/0/1">Karim Benakli</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Chen_Y/0/1/0/all/0/1">Yifan Chen</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Cheng_P/0/1/0/all/0/1">Peng Cheng</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Lafforgue_Marmet_G/0/1/0/all/0/1">Gaëtan Lafforgue-Marmet</a>
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.
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.
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