Displaced Decay Signatures in Probing Seesaw

by Chandrima Sen (Indian Institute of Technology, Hyderabad)

Friday 7 Jul 2023, 11:00 → 12:30 Europe/Rome

Sala Direzione INFN (Marconi Building, Second Floor, Sapienza University)

Seesaw mechanisms are well motivated in explaining the tiny neutrino mass. We investigate the displaced vertex signatures at the LHC/FCC and muon colliders for Type-III and Type-I Seesaw scenarios, where we expect the heavy charged or neutral fermions to be displaced depending on their Yukawa couplings and masses. A very small Yukawa coupling can lead to two successive displaced decays in case of Type-III scenario. The prospects of the transverse and longitudinal displaced decay lengths are extensively studied in the context of the boost at the LHC/FCC and muon collider. In the case of the LHC/FCC, a detailed PYTHIA based simulation is performed to determine the parameter regions that are sensitive to CMS, ATLAS and MATHUSLA detectors at the centre of mass energies of 14, 27 and 100 TeV via displaced signatures. Similarly, a futuristic study has been performed for the Type-III Seesaw at the muon collider with the centre of mass energies of 3.5, 14 and 30 TeV. I will include some of the introductory concepts and try to review some of the papers on displaced vertex searches.

References: 1) Eur.Phys.J.C 82 (2022) 3, 230 

                     2) JHEP 02 (2023) 103