DATA: 27-11-2019

Speaker: Rome Samanta (University of Southampton, UK) Type-1 seesaw is the simplest extension of the Standard Model (SM) that explains light neutrino masses and baryon asymmetry of the universe (BAU) via leptogenesis. In the first part of this talk, I shall discuss how different seesaw models can be visualised graphically and how a fine-tuning in the seesaw formula can be related to a Lorentz boost in the flavour space. I shall discuss a new parametrization of standard Casas-Ibarra orthogonal matrix and show how this new parametrisation is more useful in leptogenesis studies, particularly in SO (10) models. In the second part, I will show that an additional right handed (RH) neutrino could be a DM candidate in the two RH neutrino seesaw model if one considers the new one interacts with the other two with an effective dimension 5 operator induced by SM Higgs. This operator creates a temperature dependent matter potential and therefore the DM (the new RH neutrino) is produced from RH neutrino oscillation due to MSW-like matter effect even if the scale of new physics is post-Planckian. The operator responsible for DM production also causes the DM decay (to light neutrinos) and makes the scenario testable at neutrino telescopes such as IceCube.


11-12-2019: Multiplicity and energy dependence of light charged particle production in ALICE at the LHC
11-12-2019: Double-Logarithmic contribution to Pomeron and application to the photon-photon scattering - Boris Ermolaev
10-12-2019: Dai spazio al tempo
10-12-2019: Machine Learning in High Energy Physics - Tommaso Boccali
09-12-2019: Visita ai laboratori della Sezione INFN di Trieste da parte di studenti del Liceo Scientifico dell' IIS Cattaneo-Dall'Aglio di Castelnovo ne' Monti (RE)
09-12-2019: Properties of nuclei in the N=Z=50 region investigated via multi-nucleon transfer reactions and lifetime measurements - Marco Siciliano
06-12-2019: From kaonic atoms to strangeness in neutron stars
05-12-2019: M. Gromov - Updated results of the geo-neutrino observation with the Borexino detector
05-12-2019: A scuola di radioattivita'
04-12-2019: La fisica incontra la cittą - L'arte ed i suoi segreti: la fisica per svelarli





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