期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 11, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP11(2020)090
关键词
Beyond Standard Model; Cosmology of Theories beyond the SM; Global Symmetries
资金
- ERC grant NEO-NAT
- Marie Skldowska-Curie Individual Fellowship grant AXIONRUSH [GA 840791]
- Deutsche Forschungsgemeinschaft under Germany's Excellence Strategy [EXC 2121 Quantum Universe -390833306]
- China Scholarship Council [201904910660]
- MIUR [2017FMJFMW (PRIN2017)]
We propose two models where a U(1) Peccei-Quinn global symmetry arises accidentally and is respected up to high-dimensional operators, so that the axion solution to the strong CP problem is successful even in the presence of Planck-suppressed operators. One model is SU(N) gauge interactions with fermions in the fundamental and a scalar in the symmetric. The axion arises from spontaneous symmetry breaking to SO(N), that confines at a lower energy scale. Axion quality in the model needs N greater than or similar to 10. SO bound states and possibly monopoles provide extra Dark Matter candidates beyond the axion. In the second model the scalar is in the anti-symmetric: SU(N) broken to Sp(N) needs even N greater than or similar to 20. The cosmological DM abundance, consisting of axions and/or super-heavy relics, can be reproduced if the PQ symmetry is broken before inflation (Boltzmann-suppressed production of super-heavy relics) or after (super-heavy relics in thermal equilibrium get partially diluted by dark glue-ball decays).
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