The quest for an intermediate-scale accidental axion and further ALPs

• DOI: 10.1007/jhep06(2014)037
• Publication Date: 2014-06-10T18:52:38Z
• Authors: A. G. Dias; A. C. B. Machado; C. C. Nishi; A. Ringwald; P. Vaudrevange
• Keywords: Goldstone boson; Electroweak scale

The recent detection of the cosmic microwave background polarimeter experiment BICEP2 tensor fluctuations in B-mode power spectrum basically excludes all plausible axion models where its decay constant is above $10^{13}$ GeV. Moreover, there are strong theoretical, astrophysical, and cosmological motivations for involving, addition to axion, also axion-like particles (ALPs), with constants intermediate scale range, between $10^9$ GeV Here, we present a general analysis an further ALPs derive bounds on relative size ALP photon (and electron) coupling. We discuss what can learn from measurements couplings about fundamental parameters underlying ultraviolet completion theory. For latter consider extensions Standard Model which ALP(s) appear as pseudo Nambu-Goldstone bosons breaking global chiral $U(1)$ (Peccei-Quinn (PQ)) symmetries, occuring accidentally low energy remnants exact discrete symmetries. In such models, protected disastrous explicit symmetry effects due Planck-scale suppressed operators. scenarios considered exploit heavy right handed neutrinos getting their mass via PQ thus explain small active seesaw relation electroweak scale. show some that accommodate simultaneously dark matter candidate, explaining anomalous transparency universe $\gamma$-rays, recently reported 3.55 keV gamma line galaxies clusters galaxies, if respective