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SUMMARY:Cosmological signatures of neutrino seesaw mechanism
DTSTART;VALUE=DATE-TIME:20260706T120000Z
DTEND;VALUE=DATE-TIME:20260706T130000Z
DTSTAMP;VALUE=DATE-TIME:20260704T010900Z
UID:indico-event-5140@indico-tdli.sjtu.edu.cn
DESCRIPTION:Speakers: Chengcheng Han (Sun Yat-sen university)\n\nAbstract:
  The tiny neutrino masses are most naturally explained by seesaw mechanism
  through singlet right-handed neutrinos\, which can further explain the ma
 tter-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 t
 he shift symmetry. We demonstrate that the measurements of non-Gaussianity
  by these surveys can probe the neutrino seesaw scale and have the potenti
 al to constrain a large portion of the seesaw parameter space\, opening up
  a new window for directly testing the high-scale seesaw mechanism.Biograp
 hy: Chengcheng Han is an Associate Professor at the School of Physics\, Su
 n Yat-sen University. He received his Ph.D. degree from the Institute of T
 heoretical Physics (ITP) in 2014. He then carried out postdoctoral researc
 h at the Asia Pacific Center for Theoretical Physics (APCTP)\, the Kavli I
 nstitute for the Physics and Mathematics of the Universe (Kavli IPMU) at t
 he University of Tokyo\, and the Korea Institute for Advanced Study (KIAS)
 . He joined Sun Yat-sen University in 2020 and was selected for the univer
 sity’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 P
 hysics\, with over 2\,000 citations. His research interests include new ph
 ysics at the Large Hadron Collider (LHC)\, particle cosmology\, and dark m
 atter physics.Online Link Join Zoom Meetinghttps://caltech.zoom.us/j/35101
 13923Meeting ID: 351 011 3923No passcode \n\nhttps://indico-tdli.sjtu.edu
 .cn/event/5140/
URL:https://indico-tdli.sjtu.edu.cn/event/5140/
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