A viable QCD axion in the MeV mass range

doi:10.1007/JHEP07(2018)092

Title: A viable QCD axion in the MeV mass range

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Abstract

The QCD axion is one of the most compelling solutions of the strong CP problem. There are major current efforts into searching for an ultralight, invisible axion, which is believed to be the only phenomenologically viable realization of the QCD axion. Visible axions with decay constants at or below the electroweak scale are believed to have been long excluded by laboratory searches. Considering the significance of the axion solution to the strong CP problem, we revisit experimental constraints on QCD axions in the O(10 MeV) mass window. In particular, we find a variant axion model that remains compatible with existing constraints. This model predicts new states at the GeV scale coupled hadronically, and a variety of low-energy axion signatures, such as rare meson decays, nuclear de-excitations via axion emission, and production in e ⁺e ^- annihilation and fixed target experiments. This reopens the possibility of solving the strong CP problem at the GeV scale.

Authors:

^[1]; Weiner, Neal ^[2]

New York Univ. (NYU), NY (United States). Center for Cosmology and Particle Physics. Dept. of Physics; Princeton Univ., NJ (United States). Dept. of Physics; Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
New York Univ. (NYU), NY (United States). Center for Cosmology and Particle Physics. Dept. of Physics

Publication Date:: 2018-07-13

Research Org.:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States); New York Univ. (NYU), NY (United States); Princeton Univ., NJ (United States)

Sponsoring Org.:: USDOE; LANL Laboratory Directed Research and Development (LDRD) Program; National Science Foundation (NSF)

OSTI Identifier:: 1485404

Report Number(s):: LA-UR-17-29295
Journal ID: ISSN 1029-8479

Grant/Contract Number:: 89233218CNA000001; PHY-0947827; PHY-1316753; PHY- 0969510; PHYS-1066293

Resource Type:: Accepted Manuscript

Journal Name:: Journal of High Energy Physics (Online)

Additional Journal Information:: Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2018; Journal Issue: 7; Journal ID: ISSN 1029-8479

Publisher:: Springer Berlin

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Beyond Standard Model; CP violation; chiral Lagrangians; kaon physics

Citation Formats


                    Alves, Daniele S.  M., and Weiner, Neal. A viable QCD axion in the MeV mass range.  United States: N. p., 2018. 
        Web.  doi:10.1007/JHEP07(2018)092.

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                    Alves, Daniele S.  M., & Weiner, Neal. A viable QCD axion in the MeV mass range.  United States.  doi:10.1007/JHEP07(2018)092.

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                    Alves, Daniele S.  M., and Weiner, Neal. Fri .  
        "A viable QCD axion in the MeV mass range".  United States.  doi:10.1007/JHEP07(2018)092.  https://www.osti.gov/servlets/purl/1485404.

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@article{osti_1485404,

  title        = {A viable QCD axion in the MeV mass range},

  author       = {Alves, Daniele S.  M. and Weiner, Neal},

  abstractNote = {The QCD axion is one of the most compelling solutions of the strong CP problem. There are major current efforts into searching for an ultralight, invisible axion, which is believed to be the only phenomenologically viable realization of the QCD axion. Visible axions with decay constants at or below the electroweak scale are believed to have been long excluded by laboratory searches. Considering the significance of the axion solution to the strong CP problem, we revisit experimental constraints on QCD axions in the O(10 MeV) mass window. In particular, we find a variant axion model that remains compatible with existing constraints. This model predicts new states at the GeV scale coupled hadronically, and a variety of low-energy axion signatures, such as rare meson decays, nuclear de-excitations via axion emission, and production in e+e- annihilation and fixed target experiments. This reopens the possibility of solving the strong CP problem at the GeV scale.},

  doi          = {10.1007/JHEP07(2018)092},

  journal      = {Journal of High Energy Physics (Online)},

  number       = 7,

  volume       = 2018,

  place        = {United States},

  year         = {2018},

  month        = {7}

}

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DOI: 10.1007/JHEP07(2018)092

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