Enhanced Λ Λ production near threshold in the 12C(K-, K+) reaction KEK-PS E224 Collaboration

Jung Keun Ahn, S. Aoki, K. S. Chung, M. S. Chung, H. En'yo, T. Fukuda, H. Funahashi, Y. Goto, A. Higashi, M. Ieiri, T. Iijima, M. Iinuma, K. Imai, Y. Itow, J. M. Lee, S. Makino, A. Masaike, Y. Matsuda, Y. Matsuyama, S. MiharaC. Nagoshi, I. Nomura, I. S. Park, N. Saito, M. Sekimoto, Y. M. Shin, K. S. Sim, R. Susukita, R. Takashima, F. Takeutchi, P. Tlustý, S. Weibe, S. Yokkaichi, K. Yoshida, M. Yoshida, T. Yoshida, S. Yamashita

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Abstract

Enhanced production of Λ Λ pairs, above levels predicted by a two-step process model, has been observed near threshold (in the mass range 2.23-2.26 GeV/c2) in the 12C(K-, K+) reaction at 1.66 GeV/c using a scintillating fiber target. The differential cross section for Λ Λ production in the momentum region 0.95 ≤ pK+ ≤ 1.3 GeV/c averaged over the range 2.3° ≤ θK+ ≤ 14.7° was found to be 7.6 ± 1.3 ± 0.9 μb/sr, and that for the enhancement was found to be approximately 3 μb/sr.

Original languageEnglish
Pages (from-to)267-272
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume444
Issue number3-4
Publication statusPublished - 1998 Dec 24
Externally publishedYes

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scintillating fibers
thresholds
momentum
augmentation
cross sections

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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Enhanced Λ Λ production near threshold in the 12C(K-, K+) reaction KEK-PS E224 Collaboration. / Ahn, Jung Keun; Aoki, S.; Chung, K. S.; Chung, M. S.; En'yo, H.; Fukuda, T.; Funahashi, H.; Goto, Y.; Higashi, A.; Ieiri, M.; Iijima, T.; Iinuma, M.; Imai, K.; Itow, Y.; Lee, J. M.; Makino, S.; Masaike, A.; Matsuda, Y.; Matsuyama, Y.; Mihara, S.; Nagoshi, C.; Nomura, I.; Park, I. S.; Saito, N.; Sekimoto, M.; Shin, Y. M.; Sim, K. S.; Susukita, R.; Takashima, R.; Takeutchi, F.; Tlustý, P.; Weibe, S.; Yokkaichi, S.; Yoshida, K.; Yoshida, M.; Yoshida, T.; Yamashita, S.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 444, No. 3-4, 24.12.1998, p. 267-272.

Research output: Contribution to journalArticle

Ahn, JK, Aoki, S, Chung, KS, Chung, MS, En'yo, H, Fukuda, T, Funahashi, H, Goto, Y, Higashi, A, Ieiri, M, Iijima, T, Iinuma, M, Imai, K, Itow, Y, Lee, JM, Makino, S, Masaike, A, Matsuda, Y, Matsuyama, Y, Mihara, S, Nagoshi, C, Nomura, I, Park, IS, Saito, N, Sekimoto, M, Shin, YM, Sim, KS, Susukita, R, Takashima, R, Takeutchi, F, Tlustý, P, Weibe, S, Yokkaichi, S, Yoshida, K, Yoshida, M, Yoshida, T & Yamashita, S 1998, 'Enhanced Λ Λ production near threshold in the 12C(K-, K+) reaction KEK-PS E224 Collaboration', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 444, no. 3-4, pp. 267-272.
Ahn, Jung Keun ; Aoki, S. ; Chung, K. S. ; Chung, M. S. ; En'yo, H. ; Fukuda, T. ; Funahashi, H. ; Goto, Y. ; Higashi, A. ; Ieiri, M. ; Iijima, T. ; Iinuma, M. ; Imai, K. ; Itow, Y. ; Lee, J. M. ; Makino, S. ; Masaike, A. ; Matsuda, Y. ; Matsuyama, Y. ; Mihara, S. ; Nagoshi, C. ; Nomura, I. ; Park, I. S. ; Saito, N. ; Sekimoto, M. ; Shin, Y. M. ; Sim, K. S. ; Susukita, R. ; Takashima, R. ; Takeutchi, F. ; Tlustý, P. ; Weibe, S. ; Yokkaichi, S. ; Yoshida, K. ; Yoshida, M. ; Yoshida, T. ; Yamashita, S. / Enhanced Λ Λ production near threshold in the 12C(K-, K+) reaction KEK-PS E224 Collaboration. In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 1998 ; Vol. 444, No. 3-4. pp. 267-272.
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abstract = "Enhanced production of Λ Λ pairs, above levels predicted by a two-step process model, has been observed near threshold (in the mass range 2.23-2.26 GeV/c2) in the 12C(K-, K+) reaction at 1.66 GeV/c using a scintillating fiber target. The differential cross section for Λ Λ production in the momentum region 0.95 ≤ pK+ ≤ 1.3 GeV/c averaged over the range 2.3° ≤ θK+ ≤ 14.7° was found to be 7.6 ± 1.3 ± 0.9 μb/sr, and that for the enhancement was found to be approximately 3 μb/sr.",
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T1 - Enhanced Λ Λ production near threshold in the 12C(K-, K+) reaction KEK-PS E224 Collaboration

AU - Ahn, Jung Keun

AU - Aoki, S.

AU - Chung, K. S.

AU - Chung, M. S.

AU - En'yo, H.

AU - Fukuda, T.

AU - Funahashi, H.

AU - Goto, Y.

AU - Higashi, A.

AU - Ieiri, M.

AU - Iijima, T.

AU - Iinuma, M.

AU - Imai, K.

AU - Itow, Y.

AU - Lee, J. M.

AU - Makino, S.

AU - Masaike, A.

AU - Matsuda, Y.

AU - Matsuyama, Y.

AU - Mihara, S.

AU - Nagoshi, C.

AU - Nomura, I.

AU - Park, I. S.

AU - Saito, N.

AU - Sekimoto, M.

AU - Shin, Y. M.

AU - Sim, K. S.

AU - Susukita, R.

AU - Takashima, R.

AU - Takeutchi, F.

AU - Tlustý, P.

AU - Weibe, S.

AU - Yokkaichi, S.

AU - Yoshida, K.

AU - Yoshida, M.

AU - Yoshida, T.

AU - Yamashita, S.

PY - 1998/12/24

Y1 - 1998/12/24

N2 - Enhanced production of Λ Λ pairs, above levels predicted by a two-step process model, has been observed near threshold (in the mass range 2.23-2.26 GeV/c2) in the 12C(K-, K+) reaction at 1.66 GeV/c using a scintillating fiber target. The differential cross section for Λ Λ production in the momentum region 0.95 ≤ pK+ ≤ 1.3 GeV/c averaged over the range 2.3° ≤ θK+ ≤ 14.7° was found to be 7.6 ± 1.3 ± 0.9 μb/sr, and that for the enhancement was found to be approximately 3 μb/sr.

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