Strong CP problem and mirror world: the Weinberg–Wilczek axion revisited
By Z. Berezhiani, Leonida Gianfagna, Maurizio Giannotti. 2000
178 citations recorded by the source corpus.
Abstract A new possibility for solving the strong CP problem is suggested. It is based on the concept of a mirror world of particles, with the gauge symmetry and Lagrangian completely identical to that of the observable particles. We assume that the ordinary and mirror sectors share the same Peccei–Quinn symmetry realized a la Weinberg–Wilczek, so that the θ -terms are simultaneously canceled by the axion VEV in both worlds. This property remains valid even if the symmetry between two sectors is spontaneously broken and the weak scale of the mirror world is larger than the ordinary weak scale, in which case also the mirror QCD scale becomes larger than the ordinary one. In this situation our axion essentially represents a Weinberg–Wilczek axion of the mirror world with quite a large mass, while it couples the ordinary particles like an invisible axion. The experimental and astrophysical limits are discussed and an allowed parameter window is found with the Peccei–Quinn scale f a ∼10 4 –10 5 GeV and the axion mass m a ∼1 MeV, which can be accessible for future experiments. We also show that our solution to the strong CP problem is stable against the Planck scale induced effects.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/495d4f2ff514f64ca471dc540d0ecd03772d9ce4
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In Astronomy and Astrophysics
In Nuclear and High Energy Physics
- Gudrun Heinrich
- Cms Collaboration
- Atlas Collaboration
- Ansgar Denner
- Stefan Kallweit
- Stefan Dittmaier
- M. Grazzini
- Juan Rojo
Citations in the corpus
- The landscape of QCD axion models (2020, unknown): “[606] and in its supersymmetric extension [607].”
- Beyond the Standard Model Physics at the HL-LHC and HE-LHC (2018, background): “s [595–599] for heavy axion models and Ref.”
- TASI Lectures on the Strong CP Problem and Axions (2018, unknown): “The first is to introduce a new confining gauge group to which the axion couples [68, 69, 15, 70, 71, 72] : ( a fa +θ ) g(2)s 32π2 GG̃+ ( a fa +θ ′ ) g′2 s 32π2 G′G̃′.”