期刊
PHYSICS LETTERS B
卷 810, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.physletb.2020.135829
关键词
Peccei-Quinn symmetry; Axion; Neutrinos
资金
- Spanish grant (AEI/FEDER, UE) [FPA2017-85216-P]
- Spanish grant (Generalitat Valenciana) [PROMETEO/2018/165]
- Spanish Red Consolider MultiDark (Ministerio de Ciencia e Innovacion) [FPA2017-90566-REDC]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [305802/2019-4]
- Sao Paulo Research Foundation (FAPESP) [2017/23027-2, 2019/04195-7]
- Mexican Catedras CONACYT [749, SNI 58928]
We generalize the idea of the axion to an extended electroweak gauge symmetry setup. We propose a minimal axion extension of the Singer-Valle-Schechter (SVS) theory, in which the standard model fits in SU(3)(L) circle times U(1)(X), the number of families results from anomaly cancellation, and the Peccei-Quinn (PQ) solution to the strong-CP problem is implemented. Neutrino masses arise from a type-I Dirac seesaw mechanism, suppressed by the ratio of SVS and PQ scales, suggesting the existence of new physics at a moderate SVS scale. Novel features include an enhanced axion coupling to photons when compared to the DFSZ axion, as well as flavor-changing axion couplings to quarks. (C) 2020 The Author(s). Published by Elsevier B.V.
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