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

M. Borgh, S. Prakhov, B. M K Nefkens, C. E. Allgower, V. Bekrenev, W. J. Briscoe, M. Clajus, J. R. Comfort, K. Craig, D. Grosnick, D. Isenhower, N. Knecht, D. Koetke, A. Koulbardis, N. Kozlenko, S. Kruglov, G. Lolos, I. Lopatin, D. M. Manley, R. ManweilerA. Marušić, S. McDonald, J. Olmsted, Z. Papandreou, D. Peaslee, N. Phaisangittisakul, J. W. Price, A. F. Ramirez, M. Sadler, A. Shaft, H. Spinka, T. D S Stanislaus, A. Starostin, H. M. Staudenmaier, I. Supek, W. B. Tippens

Research output: Contribution to journalArticle

6 Scopus citations


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.

Original languageEnglish (US)
Article number015206
Pages (from-to)152061-152066
Number of pages6
JournalPhysical Review C - Nuclear Physics
Issue number1
StatePublished - Jul 2003


ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Borgh, M., 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., ... 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), 152061-152066. [015206].