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2017

Peccei-Quinn Relaxion

Jeong, Kwang Sik, Shin, Chang Sub

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The relaxation mechanism, which solves the electroweak hierarchy problem without relying on TeV scale new physics, crucially depends on how a Higgs-dependent back-reaction potential is generated.

In this paper, we suggest a new scenario in which the scalar potential induced by the QCD anomaly is responsible both for the relaxation mechanism and the Peccei-Quinn mechanism to solve the strong CP problem.
The key idea is to introduce the relaxion and the QCD axion whose cosmic evolutions become quite different depending on an inflaton-dependent scalar potential.
Our scheme raises the cutoff scale of the Higgs mass up to 10^7 GeV, and allows reheating temperature higher than the electroweak scale as would be required for viable cosmology.

Peccei-Quinn Relaxion · Around

Built on

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1977
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S. R. Coleman and F. De Luccia, Gravitational Effects on and of Vacuum Decay
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M. S. Al-sarhi, I. Jack, and D. R. T. Jones, Quadratic divergences in gauge theories
1992
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J. E. Kim and G. Carosi, Axions and the Strong CP Problem
Original
2010
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M. Kawasaki and K. Nakayama, Axions: Theory and Cosmological Role
Original
2013
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Y. Hamada, H. Kawai, and K.-y. Oda, Bare Higgs mass at Planck scale
Original
2014
Earlier work this paper cites.

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