Cosmological dynamics of Higgs potential fine tuning

Amin, Mustafa A. (Physics & Astronomy Department, Rice University, Houston, Texas 77005, USA) ; Fan, JiJi (Department of Physics, Brown University, Providence, Rhode Island 02912, USA) ; Lozanov, Kaloian D. (Max Planck Institute for Astrophysics, Karl-Schwarzschild-Stra├če 1, 85748 Garching, Germany) ; Reece, Matthew (Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA)

12 February 2019

Abstract: The Higgs potential appears to be fine-tuned, hence very sensitive to values of other scalar fields that couple to the Higgs. We show that this feature can lead to a new epoch in the early Universe featuring violent dynamics coupling the Higgs to a scalar modulus. The oscillating modulus drives tachyonic Higgs particle production. We find a simple parametric understanding of when this process can lead to rapid modulus fragmentation, resulting in gravitational wave production. A nontrivial equation of state arising from the nonlinear dynamics also affects the time elapsed from inflation to the CMB, influencing fits of inflationary models. Supersymmetric theories automatically contain useful ingredients for this picture.

Published in: Physical Review D 99 (2019)
Published by: APS
DOI: 10.1103/PhysRevD.99.035008
arXiv: 1802.00444
License: CC-BY-4.0

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