2013 Fiscal Year Final Research Report
Elucidation of baryons with unusual quark configuration
| Project Area | Quest on new hadrons with variety of flavors |
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| Project/Area Number |
21105003
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| Research Category |
Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | Osaka University |
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Principal Investigator |
NOUMI Hiroyuki 大阪大学, 核物理研究センター, 教授 (10222192)
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| Co-Investigator(Kenkyū-buntansha) |
HOTTA Tomoaki 大阪大学, 核物理研究センター, 助教 (30332745)
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| Co-Investigator(Renkei-kenkyūsha) |
SAWADA Shin'ya 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 (70311123)
MURAMATSU Norihito 東北大学, 電子光理学研究センター, 准教授 (40397766)
NARUKI Megumi 京都大学, 理学研究科, 准教授 (00415259)
TANIDA Kiyoshi ソウル国立大学校, 物理天文学部, 教授 (00360587)
NAKANO Takashi 大阪大学, 核物理研究センター, 教授 (80212091)
YORITA Tetsuhiko 大阪大学, 核物理研究センター, 助教 (30372147)
YOSOI Masaru 大阪大学, 核物理研究センター, 教授 (80183995)
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| Project Period (FY) |
2009-07-23 – 2014-03-31
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| Keywords | エキゾチックハドロン / ハドロン / レーザー電子光 / ハドロンビーム / クォーク / バリオン / 共鳴状態 / 偏極光子ビーム |
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| Research Abstract |
(1)Based on the data with 2.6 times higher statistics, we observed a peak structure at around 1530 MeV/c2 in the gamma"n"->K-K+X reaction. However, its statistical significance is found to be lower. The peak structure is rather enhanced if we reject events associate a recoiled protons which do not concern a Theta production by using information from the timing counter located just downstream the deuterium target. (2)We measured an upper limit of the cross section of the p(pi-,K-)Theta+ reaction, giving the decay width of Theta+ less than 1 MeV. (3)We observe charge asymmetry of the Lambda(1405) productions in the gamma p->K+pi+-Sigma-+ reactions. (3)An experimental study of Lambda(1405) via the d(K-,n) reaction is ready to run. (4)Construction of a large acceptance spectrometer is in progress at the LEPS2 beam line. (5)The LEPS2 beam line is now in operation.
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