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Axion quality from the (anti)symmetric of SU(N)
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abstract
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 $N \gtrsim 10$. 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 $N \gtrsim 20$. 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).
Forward citations
Cited by 4 Pith papers
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A High-Quality Axion from Exact SUSY Chiral Dynamics
A supersymmetric chiral gauge theory stabilized by anomaly-mediated supersymmetry breaking produces a composite QCD axion whose Peccei-Quinn symmetry is protected by a discrete gauge symmetry.
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Accidental Peccei-Quinn Symmetry From Gauged U(1) and a High Quality Axion
Three explicit axion models are built where a gauged axial U(1) makes the Peccei-Quinn symmetry accidental, preserving axion quality against quantum gravity and giving domain wall number one.
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Axion Quality Problem: Keep Calm and Baryon
The QCD axion can be the Goldstone boson of baryon number in a minimal N_c=N_f supersymmetric QCD sector, with PQ-breaking effects suppressed by dimension N_c+2 operators.
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Axions at the meV Crossroads: Theory, Cosmology, Astrophysics, and Experiments
The meV axion window is presented as a coherent, cross-validated search program in which string theory, stellar cooling, dark matter, and new detector concepts converge on the same mass range.
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