Using a Primordial Gravitational Wave Background to Illuminate New Physics. (arXiv:1812.07577v1 [astro-ph.CO])
<a href="http://arxiv.org/find/astro-ph/1/au:+Caldwell_R/0/1/0/all/0/1">Robert R. Caldwell</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Smith_T/0/1/0/all/0/1">Tristan L. Smith</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Walker_D/0/1/0/all/0/1">Devin G. E. Walker</a>
A primordial spectrum of gravitational waves serves as a backlight to the
relativistic degrees of freedom of the cosmological fluid. Any change in the
particle physics content, due to a change of phase or freeze-out of a species,
will leave a characteristic imprint on an otherwise featureless primordial
spectrum of gravitational waves and indicate its early-Universe provenance. We
show that a gravitational wave detector such as the Laser Interferometer Space
Antenna would be sensitive to physics near 100 TeV in the presence of a
sufficiently strong primordial spectrum. Such a detection could complement
searches at newly proposed 100 km circumference accelerators such as the Future
Circular Collider at CERN and the Super Proton-Proton Collider in China,
thereby providing insight into a host of beyond Standard Model issues,
including the hierarchy problem, dark matter, and baryogenesis.
A primordial spectrum of gravitational waves serves as a backlight to the
relativistic degrees of freedom of the cosmological fluid. Any change in the
particle physics content, due to a change of phase or freeze-out of a species,
will leave a characteristic imprint on an otherwise featureless primordial
spectrum of gravitational waves and indicate its early-Universe provenance. We
show that a gravitational wave detector such as the Laser Interferometer Space
Antenna would be sensitive to physics near 100 TeV in the presence of a
sufficiently strong primordial spectrum. Such a detection could complement
searches at newly proposed 100 km circumference accelerators such as the Future
Circular Collider at CERN and the Super Proton-Proton Collider in China,
thereby providing insight into a host of beyond Standard Model issues,
including the hierarchy problem, dark matter, and baryogenesis.
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