Probing new physics with multi-vacua quantum tunnelings beyond standard model through gravitational waves. (arXiv:2003.13244v1 [astro-ph.CO])
<a href="http://arxiv.org/find/astro-ph/1/au:+Zhou_Z/0/1/0/all/0/1">Zihan Zhou</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Yan_J/0/1/0/all/0/1">Jun Yan</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Addazi_A/0/1/0/all/0/1">Andrea Addazi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Cai_Y/0/1/0/all/0/1">Yi-Fu Cai</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Marciano_A/0/1/0/all/0/1">Antonino Marciano</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Pasechnik_R/0/1/0/all/0/1">Roman Pasechnik</a>
We report on a novel phenomenon of particle cosmology, which features
specific cosmological phase transitions via quantum tunnelings through multiple
vacua. This is inspired by the axion(-like) scalar potential, and enables to
probe the associated new physics models, constraining these from the stochastic
gravitational waves background. Multiple vacua may induce the nucleation of
multiply co-existing bubbles over the phase transition epoch, hence enhancing
the overall process of bubbles’ nucleation. Our detailed analysis of
semi-analytical and numerical solutions to the bounce equations of the path
integral, enabled us to determine the existence of three most probable escape
paths towards a local maximum of the Euclidean action. These generate
non-negligible contributions to the overall decay rate to the true vacuum. This
new mechanism of cosmological phase transitions clearly represents a possibly
sizable new source of gravitational waves, with its energy spectrum being
featured with particular patterns, which could be probed by the future
gravitational wave interferometers.
We report on a novel phenomenon of particle cosmology, which features
specific cosmological phase transitions via quantum tunnelings through multiple
vacua. This is inspired by the axion(-like) scalar potential, and enables to
probe the associated new physics models, constraining these from the stochastic
gravitational waves background. Multiple vacua may induce the nucleation of
multiply co-existing bubbles over the phase transition epoch, hence enhancing
the overall process of bubbles’ nucleation. Our detailed analysis of
semi-analytical and numerical solutions to the bounce equations of the path
integral, enabled us to determine the existence of three most probable escape
paths towards a local maximum of the Euclidean action. These generate
non-negligible contributions to the overall decay rate to the true vacuum. This
new mechanism of cosmological phase transitions clearly represents a possibly
sizable new source of gravitational waves, with its energy spectrum being
featured with particular patterns, which could be probed by the future
gravitational wave interferometers.
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