2026-04-13T02:30:21Zhttps://recercat.cat/oai/requestoai:recercat.cat:2445/1199782025-12-05T16:39:12Zcom_2072_1057col_2072_478823col_2072_478904col_2072_478917
00925njm 22002777a 4500
dc
Luzio, Luca Di
author
Mescia, Federico
author
Nardi, Enrico
author
2018-02-19T12:20:12Z
2018-02-19T12:20:12Z
2017-01-20
2018-02-19T12:20:12Z
A major goal of axion searches is to reach inside the parameter space region of realistic axion models. Currently, the boundaries of this region depend on somewhat arbitrary criteria, and it would be desirable to specify them in terms of precise phenomenological requirements. We consider hadronic axion models and classify the representations R Q of the new heavy quarks Q . By requiring that (i) the Q 's are sufficiently short lived to avoid issues with long-lived strongly interacting relics, (ii) no Landau poles are induced below the Planck scale; 15 cases are selected which define a phenomenologically preferred axion window bounded by a maximum (minimum) value of the axion-photon coupling about 2 times (4 times) larger than is commonly assumed. Allowing for more than one R Q , larger couplings, as well as complete axion-photon decoupling, become possible.
Cosmologia
PartÃcules (Matèria)
Cosmology
Particles
Redefining the Axion Window