Seminars and Colloquia
Physics
Right handed neutrinos: a roadmap from the energy to the intensity frontiers
Fri, Feb 08, 2019,
02:30 PM
at Physics Seminar Room 31, 2nd Floor, Main Building
Dr. Arindam Das
Osaka University
In this talk we will study the mass generation mechanisms of the Standard Model (SM) light neutrinos through the commonly known seesaw and inverse seesaw mechanisms which involve SM gauge singlet heavy Majorana right handed neutrinos. We fix the model parameters to reproduce the neutrino oscillation data and to satisfy other experimental constraints, assuming the typical flavor structure/s of these models and the different types of hierarchical light neutrino
mass spectra. With the fixed parameters in this way, we analyze the heavy neutrino signal at the colliders. For completeness, we also consider a general parameterization for the model parameters by introducing an arbitrary orthogonal matrix, and the non-zero Dirac and Majorana phases. We perform parameter scan to identify an allowed parameter region which satisfies all experimental constraints. We find that in some cases, the heavy neutrino signal can be observed with a large statistical significance via different flavour charged lepton final states. We will also discuss about the significance of these right handed neutrinos in the intensity frontier beyond the collider searches.
mass spectra. With the fixed parameters in this way, we analyze the heavy neutrino signal at the colliders. For completeness, we also consider a general parameterization for the model parameters by introducing an arbitrary orthogonal matrix, and the non-zero Dirac and Majorana phases. We perform parameter scan to identify an allowed parameter region which satisfies all experimental constraints. We find that in some cases, the heavy neutrino signal can be observed with a large statistical significance via different flavour charged lepton final states. We will also discuss about the significance of these right handed neutrinos in the intensity frontier beyond the collider searches.
