Dark Energy, QCD Axion, and Trans-Planckian-Inflaton Decay Constant

Pseudoscalars appear frequently in particle spectra. They can be light if they appear as pseudo-Goldstone bosons from some spontaneously broken global symmetries with the decay constant f. Since any global symmetry is broken at least by quantum gravitational effects, all pseudoscalars are massive. T...

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Bibliographic Details

Published in:	Universe
Main Author:	Jihn E. Kim
Format:	Article
Language:	English
Published:	MDPI AG 2017-09-01
Subjects:	bosonic collective motion “invisible” axion string axion quintessential axion natural inflation Trans-Planckian decay constant discrete symmetries
Online Access:	https://www.mdpi.com/2218-1997/3/4/68