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

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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.

Original languageEnglish (US)
Pages (from-to)152061-152066
Number of pages6
JournalPhysical Review C - Nuclear Physics
Volume68
Issue number1
StatePublished - Jul 2003

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momentum
thresholds
spontaneous emission
balls
mesons
spectrometers
cross sections
decay
crystals

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics

Cite this

Borgh, M., Prakhov, S., Nefkens, B. M. K., Allgower, C. E., Bekrenev, V., Briscoe, W. J., ... 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.

Search for K- p → π0 π0 π0 Λ from threshold to pk- = 750 MeV/c. / 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.; Manweiler, R.; Marušić, A.; McDonald, S.; Olmsted, J.; Papandreou, Z.; Peaslee, D.; Phaisangittisakul, N.; Price, J. W.; Ramirez, A. F.; Sadler, M.; Shaft, A.; Spinka, H.; Stanislaus, T. D S; Starostin, A.; Staudenmaier, H. M.; Supek, I.; Tippens, W. B.

In: Physical Review C - Nuclear Physics, Vol. 68, No. 1, 07.2003, p. 152061-152066.

Research output: Contribution to journalArticle

Borgh, M, Prakhov, S, Nefkens, BMK, Allgower, CE, Bekrenev, V, Briscoe, WJ, Clajus, M, Comfort, JR, Craig, K, Grosnick, D, Isenhower, D, Knecht, N, Koetke, D, Koulbardis, A, Kozlenko, N, Kruglov, S, Lolos, G, Lopatin, I, Manley, DM, Manweiler, R, Marušić, A, McDonald, S, Olmsted, J, Papandreou, Z, Peaslee, D, Phaisangittisakul, N, Price, JW, Ramirez, AF, Sadler, M, Shaft, A, Spinka, H, Stanislaus, TDS, Starostin, A, Staudenmaier, HM, Supek, I & Tippens, WB 2003, 'Search for K- p → π0 π0 π0 Λ from threshold to pk- = 750 MeV/c', Physical Review C - Nuclear Physics, vol. 68, no. 1, pp. 152061-152066.
Borgh M, Prakhov S, Nefkens BMK, Allgower CE, Bekrenev V, Briscoe WJ et al. Search for K- p → π0 π0 π0 Λ from threshold to pk- = 750 MeV/c. Physical Review C - Nuclear Physics. 2003 Jul;68(1):152061-152066.
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. ; Manweiler, R. ; Marušić, A. ; McDonald, S. ; Olmsted, J. ; Papandreou, Z. ; Peaslee, D. ; Phaisangittisakul, N. ; Price, J. W. ; Ramirez, A. F. ; Sadler, M. ; Shaft, A. ; Spinka, H. ; Stanislaus, T. D S ; Starostin, A. ; Staudenmaier, H. M. ; Supek, I. ; Tippens, W. B. / Search for K- p → π0 π0 π0 Λ from threshold to pk- = 750 MeV/c. In: Physical Review C - Nuclear Physics. 2003 ; Vol. 68, No. 1. pp. 152061-152066.
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title = "Search for K- p → π0 π0 π0 Λ from threshold to pk- = 750 MeV/c",
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.",
author = "M. Borgh and S. Prakhov and Nefkens, {B. M K} and Allgower, {C. E.} and V. Bekrenev and Briscoe, {W. J.} and M. Clajus and Comfort, {J. R.} and K. Craig and D. Grosnick and D. Isenhower and N. Knecht and D. Koetke and A. Koulbardis and N. Kozlenko and S. Kruglov and G. Lolos and I. Lopatin and Manley, {D. M.} and R. Manweiler and A. Marušić and S. McDonald and J. Olmsted and Z. Papandreou and D. Peaslee and N. Phaisangittisakul and Price, {J. W.} and Ramirez, {A. F.} and M. Sadler and A. Shaft and H. Spinka and Stanislaus, {T. D S} and A. Starostin and Staudenmaier, {H. M.} and I. Supek and Tippens, {W. B.}",
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T1 - Search for K- p → π0 π0 π0 Λ from threshold to pk- = 750 MeV/c

AU - Borgh, M.

AU - Prakhov, S.

AU - Nefkens, B. M K

AU - Allgower, C. E.

AU - Bekrenev, V.

AU - Briscoe, W. J.

AU - Clajus, M.

AU - Comfort, J. R.

AU - Craig, K.

AU - Grosnick, D.

AU - Isenhower, D.

AU - Knecht, N.

AU - Koetke, D.

AU - Koulbardis, A.

AU - Kozlenko, N.

AU - Kruglov, S.

AU - Lolos, G.

AU - Lopatin, I.

AU - Manley, D. M.

AU - Manweiler, R.

AU - Marušić, A.

AU - McDonald, S.

AU - Olmsted, J.

AU - Papandreou, Z.

AU - Peaslee, D.

AU - Phaisangittisakul, N.

AU - Price, J. W.

AU - Ramirez, A. F.

AU - Sadler, M.

AU - Shaft, A.

AU - Spinka, H.

AU - Stanislaus, T. D S

AU - Starostin, A.

AU - Staudenmaier, H. M.

AU - Supek, I.

AU - Tippens, W. B.

PY - 2003/7

Y1 - 2003/7

N2 - 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.

AB - 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.

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