Dark Matter, Baryogenesis and Neutrino Oscillations from Right Handed Neutrinos

By Laurent Canetti, M. Drewes, Tibor Frossard, M. Shaposhnikov. 2012

320 citations recorded by the source corpus.

We show that, leaving aside accelerated cosmic expansion, all experimental data in high energy physics that are commonly agreed to require physics beyond the Standard Model can be explained when completing the model by three right-handed neutrinos that can be searched for using present-day experimental techniques. The model that realizes this scenario is known as the Neutrino Minimal Standard Model (nu MSM). In this article we give a comprehensive summary of all known constraints in the nu MSM, along with a pedagogical introduction to the model. We present the first complete quantitative study of the parameter space of the model where no physics beyond the nu MSM is needed to simultaneously explain neutrino oscillations, dark matter, and the baryon asymmetry of the Universe. The key new point of our analysis is leptogenesis after sphaleron freeze-out, which leads to resonant dark matter production, thus evading the constraints on sterile neutrino dark matter from structure formation and x-ray searches. This requires one to track the time evolution of left-and right-handed neutrino abundances from hot big bang initial conditions down to temperatures below the QCD scale. We find that the interplay of resonant amplifications, CP-violating flavor oscillations, scatterings, and decays leads to a number of previously unknown constraints on the sterile neutrino properties. We furthermore reanalyze bounds from past collider experiments and big bang nucleosynthesis in the face of recent evidence for a nonzero neutrino mixing angle theta(13). We combine all our results with existing constraints on dark matter properties from astrophysics and cosmology. Our results provide a guideline for future experimental searches for sterile neutrinos. A summary of the constraints on sterile neutrino masses and mixings has appeared in Canetti et al. [Phys. Rev. Lett. 110, 061801 (2013)]. In this article we provide all details of our calculations and give constraints on other model parameters.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/021da3e5c6c52cfdbcfc4d29227f89cb9b525b22

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Nuclear and High Energy Physics

Citations in the corpus

Standard Model—axion—seesaw—Higgs portal inflation. Five problems of particle physics and cosmology solved in one stroke (2016, methodology): “See e.g. [7] for a detailed description of this model, called νMSM, and [8, 9] for the most recent and very stringent constraints on keV mass sterile neutrino dark matter.”
Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider (2019, background): “The lines labelled ‘Seesaw’ and ‘BBN’ show lower theoretical constraints from the observed neutrino masses (assuming a normal hierarchy) and primordial nucleosynthesis, respectively [295].”
Physics beyond colliders at CERN: beyond the Standard Model working group report (2019, background): “This model is particularly interesting from a phenomenological viewpoint because it is feasible for masses of as low as 10MeV [273], which are well within reach of acceleratorbased experiments.”
Heavy Neutral Leptons at FASER (2018, background): “, [34] for an extensive discussion) and lie beyond the reach of current experiments.”