Powered by Indico
v3.2.3
Abstract: The tiny neutrino masses are most naturally explained by seesaw mechanism through singlet right-handed neutrinos, which can further explain the matter-antimatter asymmetry in the Universe. In this work, we propose a new approach to study cosmological signatures of neutrino seesaw through the interaction between inflaton and right-handed neutrinos, which respects the shift symmetry. We demonstrate that the measurements of non-Gaussianity by these surveys can probe the neutrino seesaw scale and have the potential to constrain a large portion of the seesaw parameter space, opening up a new window for directly testing the high-scale seesaw mechanism.
Biography: Chengcheng Han is an Associate Professor at the School of Physics, Sun Yat-sen University. He received his Ph.D. degree from the Institute of Theoretical Physics (ITP) in 2014. He then carried out postdoctoral research at the Asia Pacific Center for Theoretical Physics (APCTP), the Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU) at the University of Tokyo, and the Korea Institute for Advanced Study (KIAS). He joined Sun Yat-sen University in 2020 and was selected for the university’s Young and Middle-aged Outstanding Talent Program. Since 2023, he has been an APCTP Fellow. He has published more than 60 papers in leading journals, including Physical Review Letters and Journal of High Energy Physics, with over 2,000 citations. His research interests include new physics at the Large Hadron Collider (LHC), particle cosmology, and dark matter physics.
Online Link Join Zoom Meeting
https://caltech.zoom.us/j/3510113923
Meeting ID: 351 011 3923
No passcode