新山 雅之
   所属   京都産業大学  理学部 物理科学科
   職種   教授
言語種別 英語
発行・発表の年月 2008/04
形態種別 研究論文
査読 査読あり
標題 Search for the Theta(+) via the K(+)p -> pi X+ reaction with a 1.2 GeV/c K+ beam
執筆形態 その他
掲載誌名 PHYSICAL REVIEW C
出版社・発行元 AMER PHYSICAL SOC
巻・号・頁 77(4)
著者・共著者 K. Miwa,S. Dairaku,D. Nakajima,S. Ajimura,J. Arvieux,H. Fujimura,H. Fujioka,T. Fukuda,H. Funahashi,M. Hayata,K. Hicks,K. Imai,S. Ishimoto,T. Kameyama,S. Kamigaito,S. Kinoshita,T. Koike,Y. Ma,T. Maruta,Y. Miura,M. Miyabe,T. Nagae,T. Nakano,K. Nakazawa,M. Naruki,H. Noumi,M. Niiyama,N. Saito,Y. Sato,S. Sawada,Y. Seki,M. Sekimoto,K. Senzaka,K. Shirotori,K. Shoji,S. Suzuki,H. Takahashi,T. Takahashi,T. N. Takahashi,H. Tamura,N. Tanaka,K. Tanida,A. Toyada,T. Watanabe,M. Yosoi,R. Zavislak
概要 The Theta(+) was searched for via the K(+)p -> pi X+ reaction using the 1.2 GeV/c K+ beam at the K6 beam line of the KEK-PS 12 GeV Proton Synchrotron. In the missing mass spectrum of the K(+)p -> pi X+ reaction, no clear peak structure was observed. Therefore a 90% C.L. upper limit of 3.5 mu b/sr was derived for the differential cross section averaged over 2(degrees) to 22(degrees) in the laboratory frame of the K(+)p -> pi(+)Theta(+) reaction. This upper limit is much smaller than the theoretical calculation for the t-channel process where a K-0* is exchanged. From the present result, either the t-channel process is excluded or the coupling constant of g(K*N Theta) is quite small.
DOI 10.1103/PhysRevC.77.045203
ISSN 2469-9985/2469-9993