Neutrino mass constraints from cosmic and earth-based laboratories
Federica Pompa, IFIC - U. Valencia
Aula Seminari DAM (7th floor)
Abstract: The observation of neutrino flavor transitions, meaning that neutrinos have non-zero masses, marks the dawn of a new era in neutrino physics. From that moment on, Cosmology, Particle and Astroparticle Physics experiments are trying to measure this tiny quantity.
I am going to focus on two ways that allow to measure the value of neutrino mass: Supernova (SN) neutrinos and neutrino-less double beta decay (0nbb) searches.
Core-collapse SN emits huge amount of MeV, all-flavors neutrinos, that propagate through the Universe until reaching the Earth. It is possible to extract bounds on the neutrino mass by observing the time delay that SN neutrino acquire during propagation. Also, the ability for next-generation neutrino observatories to look at the very early stage of the SN neutrino emission, the so called neutronization burst, reveals to be of crucial importance in order to perform even more model-independent measurements.
On the other hand, 0nbb searches allow to constrain the so called effective Majorana neutrino mass by measuring the expected decay rate for the candidate isotope. The huge uncertainties coming from nuclear physics, from both the theory and simulations side, affect dramatically current and future sensitivities on Majorana mass bounds.