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Planck-Scale Physics and Solutions to the Strong CP Problem without Axion

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arxiv hep-ph/9212318 v2 pith:I6SLRZNW submitted 1992-12-31 hep-ph

Planck-Scale Physics and Solutions to the Strong CP Problem without Axion

classification hep-ph
keywords lambdaproblemscalesolutionsstronganalyseaxionbound
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We analyse the impact of quantum gravity on the possible solutions to the strong CP problem which utilize the spontaneously broken discrete symmetries, such as parity and time reversal invariance. We find that the stability of the solution under Planck scale effects provides an upper limit on the scale $\Lambda$ of relevant symmetry breaking. This result is model dependent and the bound is most restrictive for the seesaw type models of fermion masses, with $\Lambda < 10^6$ GeV.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Universal Seesaw Leptogenesis

    hep-ph 2025-12 conditional novelty 7.0

    Leptogenesis can proceed from single-generation gauge-singlet mediator decays in a Universal Seesaw model if parity is broken in the neutrino sector; the lightest right-handed neutrino is a sub-eV dark-radiation relic.

  2. Universal Seesaw Pati-Salam Model with P for Strong CP

    hep-ph 2025-12 conditional novelty 6.0

    A parity-symmetric Pati-Salam model with universal seesaw masses gives an axionless strong-CP solution and radiatively induced neutrino masses.