Is there a new physics between electroweak and Planck scales?

TL;DR

This paper challenges the conventional expectation of new physics between the electroweak and Planck scales by arguing for a no-intermediate-scale scenario, where a minimal SM extension suffices to address neutrino masses, dark matter, baryogenesis, and inflation. It introduces the νMSM: the SM extended by three right-handed neutrinos (and optionally a light inflaton) that can explain the observed neutrino oscillations, produce dark matter, and generate the baryon asymmetry without new high-energy thresholds. The author discusses the feasibility of Planck-scale gauge coupling unification and outlines sharp experimental predictions, including a specific Higgs mass window, keV-scale sterile neutrino DM with potential X-ray signatures, and detectable lepton-number-violating signals in flavor decays. The paper thus reframes experimental priorities toward precision neutrino physics, cosmology, and rare-process searches as tests of Planck-scale unification without intermediate scales.

Abstract

We argue that there may be no intermediate particle physics energy scale between the Planck mass $M_{Pl}\sim 10^{19}$ GeV and the electroweak scale $M_W \sim 100$ GeV. At the same time, the number of problems of the Standard Model (neutrino masses and oscillations, dark matter, baryon asymmetry of the Universe, strong CP-problem, gauge coupling unification, inflation) could find their solution at $M_{Pl}$ or $M_W$. The crucial experimental predictions of this point of view are outlined.