Conformal Standard Model, Leptogenesis and Dark Matter

Abstract

The Conformal Standard Model (CSM) is a minimal extension of the Standard Model of Particle Physics based on the assumed absence of large intermediate scales between the TeV scale and the Planck scale, which incorporates only right-chiral neutrinos and a new complex scalar in addition to the usual SM degrees of freedom, but no other features such as supersymmetric partners. In this paper, we present a comprehensive quantitative analysis of this model, and show that all outstanding issues of particle physics proper can in principle be solved `in one go' within this framework. This includes in particular the stabilization of the electroweak scale, `minimal' leptogenesis and the explanation of Dark Matter, with a small mass and very weakly interacting Majoron as the Dark Matter candidate (for which we propose to use the name `minoron'). The main testable prediction of the model is a new and almost sterile scalar boson that would manifest itself as a narrow resonance in the TeV region. We give a representative range of parameter values consistent with our assumptions and with observation.

updated references, published version

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• Big-Bang Nucleosynthesis
• Conformal Symmetry and the Standard Model
• Flavour Matters in Leptogenesis
• Singlet fermionic dark matter
• Cold keV dark matter from decays and scatterings
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• Neutrino Masses and Conformal Electro-Weak Symmetry Breaking
• Electroweak Resonant Leptogenesis in the Singlet Majoron Model
• Spontaneous symmetry breaking in inflationary cosmology: on the fate of Goldstone Bosons
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Cited by in corpus (13)

• Quantum gravity fluctuations flatten the Planck-scale Higgs potential
• Scale transformations in metric-affine geometry
• Asymptotic safety of gravity, the Higgs boson mass and beyond the Standard Model physics
• Asymptotic safety and Conformal Standard Model
• Cosmological implications of Standard Model criticality and Higgs inflation
• An asymptotically safe guide to quantum gravity and matter
• Minima of Classically Scale-Invariant Potentials
• Softly broken conformal symmetry with quantum gravitational corrections
• Dark matter and Standard Model reheating from conformal GUT inflation
• Conformal Standard Model and Inflation
• Asymptotic safety and quantum gravity amplitudes
• Softly broken conformal symmetry with higher curvature terms
• Dark matter in minimal dimensional transmutation with multicritical-point principle