Hadron Ion Tea (HIT) Seminar Series
[formerly the Heavy Ion Tea Seminars]
Nuclear Science Division
Lawrence Berkeley National Laboratory
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HIT seminars are on Tuesdays at 4:00pm Pacific Time (unless otherwise noted)
HIT seminars are on Tuesdays at 4:00pm Pacific Time (unless otherwise noted)
Organizers: Yuxun Guo, Yuuka Kanakubo, Felipe Ortega, Mateusz Ploskon, Bigeng Wang and Zhenyu Ye (Contact us at hit-organizers@lbl.gov)
Previous seminars can be viewed on our HIT Youtube Channel
Upcoming seminars
Upcoming seminars
Welcome to our Hadron-Ion Tea Seminar Series in 2026! All talks are available on zoom, some are in-person as well - we hope you join us!
Apr. 7, 2026 (In person)
Dr. Fangcheng He (New Mexico State Univ.)
Location: Room 328, Birge Hall, UC Berkeley Campus MAP
Time: 4:00pm Pacific Time
ZOOM for those who are unable to come in-person: LINK
Host: Yuuka Kanakubo
Title: The calculation of neutron EDM on Lattice
Abstract: Measurements of nucleon and nuclear electric dipole moments (EDMs) play a crucial role in probing CP violation and exploring physics beyond the Standard Model. In this talk, I will present our recent progress on the θ-induced neutron EDM using the background electric field method. The signal for the neutron EDM can be enhanced by employing the Feynman–Hellmann theorem. I will also present a comparison of results obtained using different nucleon interpolating operators.
[postponed]
Prof. Jen-Chieh Peng (University of Illinois at Urbana-Champaign)
Location: Swiatecki Lounge B70 annex - 228
Time: 4:00pm Pacific Time
ZOOM for those who are unable to come in-person: LINK
Host: Keh-Fei Liu
Title: Evolution of Helicity Property of Relic Neutrinos and Implications
on Their Detection
Abstract: Neutrinos in the early Universe decoupled essentially in helicity eigenstates.
As they propagate through the Universe, their helicities could be modified via
two effects. First, neutrinos with a finite magnetic moment would rotate their
spins with respect to their momenta as they encounter cosmic magnetic fields,
modifying their helicities. Second, the bending of neutrino's spin by a
gravitational field lags the bending of its momentum, again modifying its helicity.
We study both effects and investigate the implications of the
helicity modification on the detection of relic neutrinos using the Inverse
Tritium Beta Decay (ITBD) reaction. We find that the ITBD rate depends
sensitively on the neutrino mass hierarchy and on the Dirac or Majorana nature
of the neutrinos. This talk is based on several papers in collaboration with
Gordon Baym.
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