Today\'s event: ASIAA/NTU CCMS/NTU Physics Joint Colloquium

Speaker: Jen-Chieh Peng (彭仁傑), UIUC and Institute of Physics, Academia Sinica

Topic: Search for Neutron Electric Dipole Moment

Time: 5/24 (Tuesday) 14:20 - 15:10

Place: Room 104, CCM-New Physics Building

Abstract: The existence of neutron electric dipole moments (EDM) is a signature of time-reversal violation, which implies CP violation under the assumption of CPT invariance. Although CP-violation was first observed over 40 years ago, its physics origins remain unclear. While the Standard model can describe CP-violation observed in the kaon and B-meson systems, it can not account for the matter-antimatter asymmetry in the universe. An observation of non-zero neutron EDM would provide a first direct evidence for CP violation in the baryon sector. A new proposal to measure the neutron EDM using Ultra-cold neutrons (UCN) produced in superfluid helium is discussed. The current status of this proposed experiment and the results from some initial feasibility studies are presented.

Brief Bio: 彭仁傑教授現任伊利諾大學香檳分校(UIUC)物理系的教授,同時也是美國物理協會(APS)、洛斯阿拉莫斯國家實驗室(LANL)、日本學術振興會 (JSPS)的fellow,也曾於05至06年擔任海外華人物理學會(OCPA)會長。彭教授致力於核子和粒子物理實驗;目前,他正著手研究關於中子的電偶 極以及微中子震盪的實驗。這次演講的主題正是介紹中子的電偶極的相關研究,各位千萬不可錯過彭教授深入淺出的精采演講!