Search for K- p → π0 π0 π0 Λ from threshold to pk- = 750 MeV/c

Borgh, M. ORCID: https://orcid.org/0000-0003-4243-7051, Prakhov, S., Nefkens, B. M. K., Allgower, C. E., Bekrenev, V., Briscoe, W. J., Clajus, M., Comfort, J. R., Craig, K., Grosnick, D., Isenhower, D., Knecht, N., Koetke, D., Koulbardis, A., Kozlenko, N., Kruglov, S., Lolos, G., Lopatin, I., Manley, D. M., Manweiler, R., Marušić, A., McDonald, S., Olmsted, J., Papandreou, Z., Peaslee, D., Phaisangittisakul, N., Sadler, M., Shaft, A., Spinka, H., Stanislaus, T. D. S., Starostin, A., Staudenmaier, H. M., Supek, I. and Tippens, W. B. (2003) Search for K- p → π0 π0 π0 Λ from threshold to pk- = 750 MeV/c. Physical Review C - Nuclear Physics, 68 (1). pp. 152061-152066. ISSN 0556-2813

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Abstract

The results of a search for K- p → π0 π0 π0 Λ (where the 3π0,s are not from η-meson decay) are presented. The data were obtained with the Crystal Ball spectrometer at eight beam momenta from 514 to 750 MeV/c. For the six beam momenta below pk- = 714 MeV/c, no signal was found; the 90% C.L. upper limit obtained for the K- p → 3 π0 Λ total cross section σt varies between 2 and 7 μb. This small upper limit is indicative that spontaneous π0 emission is insignificant, since the K- p → π0 π 0 π0 Λ threshold is at pk- = 397 MeV/c. A signal was observed only at pk- = 750 MeV/c, with σt = 25±7 μb. These results can be explained only if triple π0 production goes predominantly by hyperon resonance deexcitation, K- p → ∑* → π 0Λ*. There are several candidates for the ∑* but only one for the Λ*, namely, the Λ(1520)3-/2, as the threshold for K- p → π0 Λ (1520) is p k- = 704 MeV/c.

Item Type:	Article
Uncontrolled Keywords:	nuclear and high energy physics ,/dk/atira/pure/subjectarea/asjc/3100/3106
Faculty \ School:	Faculty of Science > School of Engineering, Mathematics and Physics
UEA Research Groups:	Faculty of Science > Research Groups > Centre for Photonics and Quantum Science Faculty of Science > Research Groups > Quantum Matter
Related URLs:	http://www.scopus.com/inward/record.url?...
Depositing User:	LivePure Connector
Date Deposited:	07 Nov 2024 12:48
Last Modified:	07 Nov 2024 17:30
URI:	https://ueaeprints.uea.ac.uk/id/eprint/97565
DOI:	10.1103/PhysRevC.68.015206

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