| Project/Area Number |
25400309
|
|---|
| 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 | High Energy Accelerator Research Organization |
|---|
Principal Investigator |
NOMURA Tadashi 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 准教授 (10283582)
|
|---|
| Project Period (FY) |
2013-04-01 – 2016-03-31
|
| Project Status |
Completed (Fiscal Year 2015)
|
| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
|
|---|
| Keywords | K中間子稀崩壊 / 大強度中性ビーム / J-PARC |
|---|
| Outline of Final Research Achievements |
In the rare Kaon decay experiment, which utilizes the J-PARC accelerator, the physics analysis of the data taken in 2013 for 100 hours was performed. The sensitivity equivalent to the current world record was achieved as the result. The analysis also revealed that background rejection is necessary to proceed to further sensitivity, especially for the backgrounds due to neutron interactions. After developing and implementing devices and methods to evaluate the quality of the neutral beam, data taking was resumed in 2015. Data amount taken in 2015 corresponds to improvement of the sensitivity by a factor of 20, compared with current world records. Combined with data for background evaluation, the data analysis is ongoing to extract a new result.
|
