Accidental Peccei-Quinn symmetry from chiral gauge symmetry and mirror QCD
- 1The University of Tokyo
- 2Department of Physics, The University of Chicago
- 3The University of Tokyo Institutes for Advanced Study, The University of Tokyo
Abstract
A bstract : We present a solution to the strong CP problem in which a simple chiral U (1) gauge symmetry gives rise to an accidental Peccei-Quinn symmetry that is both explicitly and spontaneously broken by mirror QCD dynamics, yielding a framework without massless fermions or a light QCD axion. The model contains no stable domain walls or colored relics, and it accommodates a sufficiently high reheating temperature to account for the baryon asymmetry of the Universe via leptogenesis. Metastable domain walls and first-order mirror QCD phase transition generate a stochastic background of primordial gravitational waves. Additionally, one of the pseudo-Nambu-Goldstone bosons serves as a viable WIMP dark matter candidate. The gauge boson associated with the chiral U (1) gauge symmetry, which kinetically mixes with the Standard Model hypercharge gauge boson, provides a vector portal connecting dark matter to the Standard Model and plays a central role in the dark-matter phenomenology. Colored pseudo-Nambu-Goldstone bosons can be probed at the LHC through searches for dijet resonances, jets plus missing energy, multijet events with leptons, and displaced vertices.
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BibTeX
@article{fukuda2026accidental,
title = {{Accidental Peccei-Quinn symmetry from chiral gauge symmetry and mirror QCD}},
author = {Hajime Fukuda and Keisuke Harigaya},
journal = {Journal of High Energy Physics},
year = {2026},
month = oct,
doi = {10.1007/jhep10(2026)180},
url = {https://link.springer.com/article/10.1007/JHEP10(2026)180},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Accidental Peccei-Quinn symmetry from chiral gauge symmetry and mirror QCD
AU - Hajime Fukuda
AU - Keisuke Harigaya
PY - 2026
DA - 2026/10/16
JO - Journal of High Energy Physics
DO - 10.1007/jhep10(2026)180
UR - https://link.springer.com/article/10.1007/JHEP10(2026)180
AB - A bstract : We present a solution to the strong CP problem in which a simple chiral U (1) gauge symmetry gives rise to an accidental Peccei-Quinn symmetry that is both explicitly and spontaneously broken by mirror QCD dynamics, yielding a framework without massless fermions or a light QCD axion. The model contains no stable domain walls or colored relics, and it accommodates a sufficiently high reheating temperature to account for the baryon asymmetry of the Universe via leptogenesis. Metastable domain walls and first-order mirror QCD phase transition generate a stochastic background of primordial gravitational waves. Additionally, one of the pseudo-Nambu-Goldstone bosons serves as a viable WIMP dark matter candidate. The gauge boson associated with the chiral U (1) gauge symmetry, which kinetically mixes with the Standard Model hypercharge gauge boson, provides a vector portal connecting dark matter to the Standard Model and plays a central role in the dark-matter phenomenology. Colored pseudo-Nambu-Goldstone bosons can be probed at the LHC through searches for dijet resonances, jets plus missing energy, multijet events with leptons, and displaced vertices.
SN - 1029-8479
ER -