Dec 15 – 16, 2022
Centre for Particle Theory, Durham
Europe/London timezone

Constraining Heavy Neutral Leptons with DUNE & Neutrinoless Double Beta Decay

Dec 15, 2022, 4:30 PM
Ph30 (zoom room 2) (Centre for Particle Theory, Durham)

Ph30 (zoom room 2)

Centre for Particle Theory, Durham

Department of Physics Durham University South Road Durham DH1 3LE
Long talk (20 mins) Full Length Talks


Mr Zhong Zhang (UCL)


Heavy Neutral Leptons (HNLs) are a popular extension of the Standard Model to explain the lightness of neutrino masses and the matter-antimatter asymmetry through leptogenesis. Future direct searches, such as fixed target setups like DUNE, and neutrinoless double beta decay are both expected to probe the regime of active-sterile neutrino mixing in a standard Seesaw scenario of neutrino mass generation for HNL masses around 1 GeV. We analyze the complementarity between future direct searches and neutrinoless double beta decay to probe the nature of HNLs, i.e., whether they Majorana or Quasi-Dirac states, and CP-violating phases in the sterile neutrino sector. Following an analytic discussion of the complementarity, we implement a generic fixed target experiment modelling DUNE. We perform a statistical study in how a combined observation of HNLs in direct searches and neutrinoless double beta decay can probe the nature of sterile neutrinos.

Type of presentation 20 minute talk
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Primary authors

Dr Patrick Bolton (INFN) Prof. Frank Deppisch (UCL) Mr Mudit Rai (Pittsburgh) Mr Zhong Zhang (UCL)

Presentation materials