Feb 18 – 26, 2021
Europe/Rome timezone

Search for light exotic fermions in double beta decay

Feb 23, 2021, 11:35 AM
Room 1 (https://unipd.link/NeuTel-ParallelRoom1)

Room 1


Parallel Flash talk Neutrino Masses and Mixings Double Beta decays and Neutrino Masses


Ms Elisabetta Bossio (Physik-Department, Technische Universität München)


Double beta decay is predicted in the Standard Model with the emission of two active neutrinos. Models in which light exotic fermions are emitted, replacing one or both the neutrinos in the final state, could be tested through the search for spectral distortions in the electron spectrum with respect to the Standard Model expectations. In this contribution the discovery potential of a selection of neutrinoless double beta decay experiments will be presented, under two concrete scenarios: the single production of a light sterile neutrino in double beta decay and the pair production of light Z$_2$-odd fermions. It will be shown that future searches allow to test for the first time a new part of the parameter space at the MeV-mass scale, as discussed in [1].
[1] M. Agostini, E. Bossio, A. Ibarra, X. Marcano, arXiv:2012.09281 (2020)

Primary authors

Ms Elisabetta Bossio (Physik-Department, Technische Universität München) Mr Matteo Agostini (Department of Physics and Astronomy, University College London, Physik-Department, Technische Universität München) Mr Alejandro Ibarra (Physik-Department, Technische Universität München) Mr Xabier Marcano (Physik-Department, Technische Universität München)

Presentation materials