| Project/Area Number |
23224007
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (S)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
|
|---|
| Research Institution | Osaka University |
|---|
Principal Investigator |
YAMANAKA TAKU 大阪大学, 理学(系)研究科(研究院), 教授 (20243157)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
KOMATSUBARA Takeshi 高エネルギー加速器研究機構, 素粒子原子核研究所, 教授 (30242168)
NANJO Hajime 京都大学, 理学研究科, 助教 (40419445)
TAJIMA Yasuhisa 山形大学, 学内共同利用施設等, 准教授 (50311577)
MATSUMURA Toru 防衛大学校, 応用科学群, 講師 (00545957)
SUZUKI Shiro 佐賀大学, 工学研究科, その他 (50089851)
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
LIM GeiYoub 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 (90332113)
NOMURA Tadashi 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) |
2011-04-01 – 2016-03-31
|
| Project Status |
Completed (Fiscal Year 2015)
|
| Budget Amount *help |
¥222,950,000 (Direct Cost: ¥171,500,000、Indirect Cost: ¥51,450,000)
Fiscal Year 2015: ¥22,620,000 (Direct Cost: ¥17,400,000、Indirect Cost: ¥5,220,000)
Fiscal Year 2014: ¥28,860,000 (Direct Cost: ¥22,200,000、Indirect Cost: ¥6,660,000)
Fiscal Year 2013: ¥30,550,000 (Direct Cost: ¥23,500,000、Indirect Cost: ¥7,050,000)
Fiscal Year 2012: ¥32,890,000 (Direct Cost: ¥25,300,000、Indirect Cost: ¥7,590,000)
Fiscal Year 2011: ¥108,030,000 (Direct Cost: ¥83,100,000、Indirect Cost: ¥24,930,000)
|
|---|
| Keywords | 素粒子実験 / K中間子 / CP対称性の破れ / 標準理論を超える物理 / 中性K中間子 / 国際研究者交流 / CP非保存 / 稀崩壊 / J-PARC / 対称性の破れ |
|---|
| Outline of Final Research Achievements |
To search for new physics beyond the standard model, that breaks the CP symmetry, we will search for a rare KL decay mode using the J-PARC high intensity proton accelerator. We developed various new detectors for the new experiment, and started taking data. We showed that the new experiment has 2 orders of magnitude higher sensitivity than the previous experiment. We also found a new type of background events, and developed various techniques to suppress it. We plan to reach the original goal by collecting data with an increasing beam power, despite a 3 years of delay caused by the earthquake and a radiation accident.
|
| Assessment Rating |
Verification Result (Rating)
A-
|
Assessment Rating |
Result (Rating)
A-: Progress in the research is steadily towards the initial goal. However, further efforts are necessary as a part of the research progress is delayed.
|
