Speaker
Prof.
Hirokazu Tamura
(Deprtment of Physics, Tohoku University)
Description
A series of hypernuclear gamma-ray spectroscopy experiments using a germanium detector array, Hyperball, have accumulated precise data on various p-shell Lambda hypernuclei. We observed "hypernuclear fine structure" in various hypernuclei and extracted the strengths of the spin-dependent parts of the Lambda-N interaction. The obtained strengths allow us to reproduce structure of Lambda hypernuclei quite well, and to test and improve baryon-baryon interaction models.
In the J-PARC facility, further experiments of hypernuclear gamma-ray spectroscopy are planned to be performed. In the first experiment (E13), we will extend our study to s-shell and sd-shell hypernuclei and investigate the Lambda-N interaction more in detail. We also plan to study the g factor of a Lambda in a nucleus by measuring a spin-flip B(M1) value in hypernuclei. In future, we will also investigate "impurity effect" of nuclear structure induced by a Lambda, such as the shrinking effect and a possible change of deformation.
Primary author
Prof.
Hirokazu Tamura
(Deprtment of Physics, Tohoku University)
