On the interplay between astrophysical and laboratory probes of MeV-scale axion-like particles. (arXiv:2004.01193v1 [hep-ph])
<a href="http://arxiv.org/find/hep-ph/1/au:+Ertas_F/0/1/0/all/0/1">Fatih Ertas</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Kahlhoefer_F/0/1/0/all/0/1">Felix Kahlhoefer</a>
Studies of axion-like particles (ALPs) commonly focus on a single type of
interaction, for example couplings only to photons. Most ALP models however
predict correlations between different couplings, which change the
phenomenology in important ways. For example, an MeV-scale ALP coupled to
Standard Model gauge bosons at high energies will in general interact with
photons, $W^pm$ and $Z$ bosons as well as mesons and nucleons at low energies.
We study the implications of such scenarios and point out that astrophysical
constraints, in particular from SN1987A, may be substantially relaxed, opening
up new regions of parameter space that may be explored with laboratory
experiments such as NA62.
Studies of axion-like particles (ALPs) commonly focus on a single type of
interaction, for example couplings only to photons. Most ALP models however
predict correlations between different couplings, which change the
phenomenology in important ways. For example, an MeV-scale ALP coupled to
Standard Model gauge bosons at high energies will in general interact with
photons, $W^pm$ and $Z$ bosons as well as mesons and nucleons at low energies.
We study the implications of such scenarios and point out that astrophysical
constraints, in particular from SN1987A, may be substantially relaxed, opening
up new regions of parameter space that may be explored with laboratory
experiments such as NA62.
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