Measurements of the lightest hypernucleus (HΛ3): progress and perspective
Jinhui Chen1, Xin Dong2, Yu-Gang Ma1
1Key Laboratory of Nuclear Physics and Ion-beam Application (Ministry of Education), Institute of Modern Physics, Fudan University, Shanghai 200433, China; Shanghai Research Center for Theoretical Nuclear Physics, National Natural Science Foundation of China, Fudan University, Shanghai 200438, China.
Abstract:
The hyperon-nucleon (Y-N) interaction is important for the description of the equation-of-state of high baryon density matter. Hypernuclei, the cluster object of nucleons and hyperons, serve as cornerstones of a full understanding of the Y-N interaction. Recent measurements of the lightest known hypernucleus, the hypertriton's (HΛ3) and anti-hypertriton's (H¯Λ¯3) lifetime, mass and Λ separation energy have attracted interests on the subject. Its cross section and collective flow parameters have also been measured in heavy-ion collisions, which have revealed new features on its production mechanism. In this article we summarise recent measurements of HΛ3, focusing on the heavy-ion collisions. We will discuss their implications for the HΛ3 properties and the constrains on the Y-N interaction models.
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