A Common Origin for the QCD Axion and Sterile Neutrinos from $SU(5)$ Strong Dynamics
| Autor: | Cox, Peter, Gherghetta, Tony, Paul, Arpon |
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| Rok vydání: | 2023 |
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| Zdroj: | J. High Energ. Phys. 2023, 180 (2023) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1007/JHEP12(2023)180 |
| Popis: | We identify the QCD axion and right-handed (sterile) neutrinos as bound states of an $SU(5)$ chiral gauge theory with Peccei-Quinn (PQ) symmetry arising as a global symmetry of the strong dynamics. The strong dynamics is assumed to spontaneously break the PQ symmetry, producing a high-quality axion and naturally generating Majorana masses for the right-handed neutrinos at the PQ scale. The composite sterile neutrinos can directly couple to the left-handed (active) neutrinos, realizing a standard see-saw mechanism. Alternatively, the sterile neutrinos can couple to the active neutrinos via a naturally small mass mixing with additional elementary states, leading to light sterile neutrino eigenstates. The $SU(5)$ strong dynamics therefore provides a common origin for a high-quality QCD axion and sterile neutrinos. Comment: 14 pages, 6 figures, v2: version published in JHEP |
| Databáze: | arXiv |
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