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新山 雅之 所属 京都産業大学 理学部 物理科学科 職種 教授 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2014/10 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | Inclusive spectrum of the d(π+, K+) reaction at 1.69 GeV/c |
| 執筆形態 | その他 |
| 掲載誌名 | Progress of Theoretical and Experimental Physics |
| 巻・号・頁 | 2014(10),pp.101D03 |
| 著者・共著者 | Ichikawa Y,Nagae T,Bhang H,Bufalino S,Ekawa H,Evtoukhovitch P,Feliciello A,Fujioka H,Hasegawa S,Hayakawa S,Honda R,Hosomi K,Imai K,Ishimoto S,Joo C,Kanatsuki S,Kiuchi R,Koike T,Kumawat H,Matsumoto Y,Miwa K,Moritsu M,Naruki M,Niiyama M,Nozawa Y,Ota R,Sakaguchi A,Sako H,Samoilov V,Sato S,Shirotori K,Sugimura H,Suzuki S,Takahashi T,Takahashi T.N,Tamura H,Tanaka T,Tanida K,Tokiyasu A.O,Tsamalaidze Z,Roy B,Ukai M,Yamamoto T.O,Yang S |
| 概要 | We have measured an inclusive missing-mass spectrum of the d(π+, K+) reaction at a pion incident momentum of 1.69∈GeV/c at laboratory scattering angles between 2\circ and 16\circ with a missing-mass resolution of 2.7 \pm 0.1MeV/c{2} (FWHM) at the missing mass of 2.27∈GeV/c{2}. In this letter, we first try to understand the spectrum as a simple quasi-free picture based on several known elementary cross sections, considering the neutron/proton Fermi motion in the deuteron. While gross spectrum structures are well understood in this picture, we have observed two distinct deviations; one peculiar enhancement at 2.13∈GeV/c{2} is due to the \Sigma N cusp, and the other notable feature is a shift of a broad bump structure, mainly originating from hyperon resonance productions of \Lambda (1405) and \Sigma (1385){+ /0}, by about 22.4 \pm 0.4 (stat.) {+2.7}-{-1.7} (syst.)∈MeV/c{2} toward the low-mass side, which is calculated in the kinematics of a proton at rest as the target. |
| DOI | 10.1093/ptep/ptu128 |
| ISSN | /2050-3911 |
| Put Code(ORCID) | 23879216 |
| PermalinkURL | http://www.scopus.com/inward/record.url?eid=2-s2.0-84928922763&partnerID=MN8TOARS |
| researchmap用URL | http://orcid.org/0000-0001-8653-3761 |