Report Title: Toward Direct Lifetime Measurement of 3,4LambdaH Hypernuclei Using the (K-, Pion^0) Reaction

Speaker: Ma Yue, Senior Researcher (RIKEN)

Host: Professor Feng Zhaoqing

Report time: 9:00-10:00 AM, Thursday, April 23, 2026

Report location: Room 402, Building 23, Wushan Campus, South China University of Technology

Host: School of Physics and Optoelectronics

Report Abstract: The lifetimes of light hypernuclei, particularly the hypertriton ^3_Lambda H, have been the subject of intense research due to conflicting measurements from recent heavy-ion collision experiments. Some measurements report lifetimes significantly shorter than the free Lambda lifetime (HypHI 2013, STAR 2018, and ALICE 2016), while others find consistency with it (STAR 2021 and ALICE 2023). To address this discrepancy, our J-PARC E73 experiment employs the K^-, pion^0) strangeness exchange reaction with a high-intensity $K^-$ beam at the J-PARC K1.8 beam line, enabling direct lifetime measurements of both ^3_Lambda H and ^4_Lambda H hypernuclei in the time domain

Introduction to the presenter:

Education

1998 – 2002, B.S. in Nuclear Physics, Lanzhou University, China

2004 – 2006, M.S. in Physical Science, Tohoku University, Japan

2006 – 2009, Ph.D. in Physics Tohoku University, Japan

Professional Appointments

2002 – 2004, Research Assistant, Institute of Modern Physics, China

2009 – 2012, Postdoctoral Researcher, Helmholtz-Institut Mainz, Germany

2012 – Present, Senior Research Scientist, Meson Science Laboratory, RIKEN, Japan