Few-Body Aspects of Hypernuclear Physics

• Published in: Few-body systems Vol. 53; no. 3-4; pp. 189 - 236
• Main Author: Hiyama, Emiko
• Format: Journal Article
• Language: English
• Published: Vienna Springer Vienna 01.10.2012; Springer Nature B.V
• Subjects: Atomic; Atomic physics; Hadrons; Heavy Ions; Mathematical models; Molecular; Nuclear Physics; Optical and Plasma Physics; Particle and Nuclear Physics; Physics; Physics and Astronomy; Review; Hida Event; Gaussian Expansion Method; Light Hypernuclei; Core Nucleus; Rearrangement Channel
• ISSN: 0177-7963; 1432-5411
• DOI: 10.1007/s00601-011-0296-8

Recent development in the study of the structure of light Λ and double Λ hypernuclei is reviewed from the view point of few-body problems and interactions between the constituent particles. In the study the present author and collaborators employed Gaussian expansion method for few-body calculations; the method has been applied to many kinds of few-body systems in the fields of nuclear physics and exotic atomic/molecular physics. We reviewed the following subjects studied using the method: (1) Precise three- and four-body calculations of , , , , , , , and provide important information on the spin structure of the underlying Λ N interaction by comparing the calculated results with the recent experimental data by γ -ray hypernuclear spectroscopy. (2) The Λ - Σ coupling effect was investigated in and on the basis of the N  +  N  +  N  +  Λ ( Σ ) four-body model. (3) A systematic study of double- Λ hypernuclei and the Λ Λ interaction, based on the NAGARA event data ( ), was performed within the α +  x  +  Λ +  Λ cluster model ( x = n , p , d , t , 3 He and α ) and α +  α +  n  +  Λ +  Λ cluster model, (4) The Demachi-Yanagi event was interpreted as observation of the 2 + state of , (5) The Hida event was interpreted as observation of the ground state of .