Université Autonome de Madrid
The neutrinoless double-beta decay is a hypothetical lepton-number-violating process that, if observed, would have fundamental implications for physics beyond the Standard Model. First and foremost, a nonzero decay rate would imply that the neutrino is a Majorana particle, i.e. its own antiparticle. In the search for this elusive decay, nuclear theory plays an important role as the half life of the decay depends on a nuclear matrix element that cannot be measured. Unfortunately, the values predicted by current phenomenological nuclear models di︎er by factors of up to three, causing an uncertainty of about an order of magnitude in the half-life. In this seminar, I will present a novel ab initio method that can describe any arbitrary deformed medium-mass nuclei and show results concerning its application to the description of the neutrinoless double-beta decay of 48Ca to 48Ti.