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Abstract：
The measurement of neutrino mass represents a long-standing major scientific challenge, carrying profound significance for both particle physics and astrophysics. The energy spectra of β-decay or electron capture (EC) in radioactive nuclides can be employed to directly measure neutrino mass. Isotopes with low decay energy are particularly advantageous for enhancing the sensitivity of neutrino mass measurements due to the significantly enhanced decay rate in the endpoint region of the decay energy spectrum. The EC decay process of 159Dy to 159Tb exhibits an ultra low decay energy. This paper proposes using superconducting detectors to study the decay energy spectrum of this process， expecting to achieve a direct measurement of the electron-neutrino mass with sub-eV sensitivity at a 90% confidence level.
About the speaker:
Prof. Heng received his Bachelor’s Degree in Theoretical Physics from Jilin University in 1993; Master’s Degree in Theoretical Physics from Beijing Normal University in 1996; and Doctoral Degree in Particle Physics and Nuclear Physics from IHEP in 1999. He worked as a Postdoctoral research for 2 years afterward, then as associate professor since 2001 and professor since 2007 at IHEP. He has led the development of: Time-of-Flight Detector for Beijing Spectrometer III (BESIII); Neutrino detectors for Daya Bay Reactor Neutrino Experiment; Central detector for Jiangmen Neutrino Experiment (JUNO). Served as leader of one detector group at EPC of IHEP, as well as Deputy Manager of Jiangmen Neutrino Experiment. He has won multiple awards which include National Natural Science Award First Prize; Special Government Allowance of the State Council; National Innovation and Pioneer Medal; CAS Outstanding Achievement Award; World Breakthrough Prize in Fundamental Physics.
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Meeting ID 会议号: 95864970668
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