| Project/Area Number |
25400278
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
|
|---|
| Research Institution | Osaka Electro-Communication University |
|---|
Principal Investigator |
HARADA Toru 大阪電気通信大学, 工学部, 教授 (70238187)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
HIRABAYASHI Yoshiharu 北海道大学, 情報基盤センター, 准教授 (60271714)
|
|---|
| Project Period (FY) |
2013-04-01 – 2016-03-31
|
| Project Status |
Completed (Fiscal Year 2015)
|
| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
|
|---|
| Keywords | ハイパー核 / ストレンジネス / 核反応 / チャネル結合法 / 相互作用 / 共鳴状態 / シグマ粒子 / 少数体系 / スペクトル / リーマン面 / チャネル結合 / 連続状態 / 理論核物理 |
|---|
| Outline of Final Research Achievements |
We theoretically study production and decay spectra of hypernuclear states at J-PARC experiments within a distorted-wave impulse approximation in order to see properties of hyperons in nuclear matter. The results are as follows: (1) We confirm possible existence of a Sigma NN quasi-bound state as the 1/2+ isotriplet state whose signal is clearly observed in the 3He(K-, pi-) spectrum, whereas a peak of the quasi-bound state is rather reduced in the 3He(K-, pi+) spectrum owing to the interference effects. (2) Applying the multichannel Green's function constructed by the CDCC method, we show that the calculated spectrum has the ability to fully describe Lambda-p-p breakup continuum states in 3He(K-, pi-) reactions. (3) We predict that a pole of the S-matrix for a p-wave Sigma resonant state in 4-Sigma-He is located in the complex E plane and that the shape of the conversion spectra in 4He(K-, pi-) reactions provide valuable information on Sigma N and Sigma N-Lambda N interactions.
|
