Intermediate Scale Accidental Axion and ALPs

Abstract

We discuss the problem of constructing models containing an axion and axion-like particles, motivated by astrophysical observations, with decay constants at the intermediate scale ranging from $10^9$GeV to $10^{13}$GeV. We present examples in which the axion and axion-like particles arise accidentally as pseudo Nambu-Goldstone bosons of automatic global chiral symmetries, in models having exact discrete symmetries.

Comments: 4 pages. To appear in the Proceedings of the 10th Patras Workshop on Axions, WIMPs and WISPs, CERN, 29 June - 04 July 2014