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Weyl-invariant Einstein-Cartan gravity: unifying the strong CP and hierarchy puzzles

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arxiv 2406.11956 v1 pith:SR7ANAXS submitted 2024-06-17 hep-th gr-qchep-ph

Weyl-invariant Einstein-Cartan gravity: unifying the strong CP and hierarchy puzzles

Georgios K. Karananas , Mikhail Shaposhnikov , Sebastian Zell This is my paper
classification hep-th gr-qchep-ph
keywords massmodelparticlestandardeinstein-cartangravitysolvestrong
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We show that the minimal Weyl-invariant Einstein-Cartan gravity in combination with the Standard Model of particle physics contains just one extra scalar degree of freedom (in addition to the graviton and the Standard Model fields) with the properties of an axion-like particle which can solve the strong CP-problem. The smallness of this particle's mass as well as of the cosmological constant is ensured by tiny values of the gauge coupling constants of the local Lorentz group. The tree value of the Higgs boson mass and that of Majorana leptons (if added to the Standard Model to solve the neutrino mass, baryogenesis and dark matter problems) are very small or vanishing, opening the possibility of their computability in terms of the fundamental parameters of the theory due to nonperturbative effects.

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Cited by 4 Pith papers

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  3. QCD axion from broken scale symmetry

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  4. Cosmic Dynamics in Einstein-Cartan Theory: Analysing Hubble Tension through Curvature and Torsion field

    astro-ph.CO 2024-10 unverdicted novelty 4.0

    Einstein-Cartan model with torsion and H = -α φ assumption fitted via MCMC to CC data produces H0 values of 66-69 km/s/Mpc favoring the CMB side of the Hubble tension.