Investigation of the reaction pp → pK0π+Λ in search of the pentaquark
| Popis: | The reaction pp->p K0 pi+ Lambda has been studied with the ANKE spectrometer at COSY-Juelich at a beam momentum of 3.65 GeV/c in order to search for a possible signal of the pentaquark Theta+(1540), decaying into the p K0 system. By detecting four charged particles in the final state, the K0 and the Lambda have been reconstructed to tag strangeness production. It has been found that the pi+ Lambda missing-mass spectrum displays no significant signal expected from the Theta+(1540) excitation. The total cross section for the reaction pp->p K0 pi+ Lambda has been deduced, as well as an upper limit for the Theta+ production cross section. The intermediate Delta++ K0 Lambda state is found to provide a significant contribution to the reaction. Comment: 10 pages, 7 figures; text changed, references added, style file changed |
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| ISSN: | 1361-6471 0954-3899 |
| DOI: | 10.1088/0954-3899/34/4/002 |
| Přístupová URL adresa: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::76d0b308d5a55d0b61e084308a773b95 https://doi.org/10.1088/0954-3899/34/4/002 |
| Rights: | OPEN |
| Přírůstkové číslo: | edsair.doi.dedup.....76d0b308d5a55d0b61e084308a773b95 |
| Autor: | Markus Büscher, H. Ströher, I. Keshelashvili, Yu. Valdau, M. Hartmann, V. Kleber, S. Mikirtychiants, R. Schleichert, A. Sibirtsev, M. Nekipelov, Yoshikazu Maeda, V. Koptev |
| Rok vydání: | 2007 |
| Předmět: |
Nuclear and High Energy Physics
Proton Juelich COSY PS Strangeness momentum dependence [channel cross section] hadroproduction [Theta(1540)] ddc:530 Nuclear Experiment exclusive reaction [p p] Physics experimental results [magnetic spectrometer] hadroproduction [Lambda] associated production [pi+] missing-mass [mass spectrum] Strangeness production 3.65 GeV/c associated production [K0] p p --> Lambda p K0 pi+ Pentaquark Charged particle search for [pentaquark] Exotic baryon Mass spectrum Atomic physics intermediate state [Delta(1232)++] upper limit Excitation |
| Zdroj: | Journal of physics / G 34, 627-635 (2007). doi:10.1088/0954-3899/34/4/002 |
| ISSN: | 1361-6471 0954-3899 |
| DOI: | 10.1088/0954-3899/34/4/002 |
| Popis: | The reaction pp->p K0 pi+ Lambda has been studied with the ANKE spectrometer at COSY-Juelich at a beam momentum of 3.65 GeV/c in order to search for a possible signal of the pentaquark Theta+(1540), decaying into the p K0 system. By detecting four charged particles in the final state, the K0 and the Lambda have been reconstructed to tag strangeness production. It has been found that the pi+ Lambda missing-mass spectrum displays no significant signal expected from the Theta+(1540) excitation. The total cross section for the reaction pp->p K0 pi+ Lambda has been deduced, as well as an upper limit for the Theta+ production cross section. The intermediate Delta++ K0 Lambda state is found to provide a significant contribution to the reaction. Comment: 10 pages, 7 figures; text changed, references added, style file changed |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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