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

J. K. 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. Mihara; C. 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

doi:10.1016/S0370-2693(98)01416-6

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

J. K. 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

Research output: Contribution to journal › Article › peer-review

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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 ≤ p_K+ ≤ 1.3 GeV/c averaged over the range 2.3° ≤ θ_K+ ≤ 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 language	English
Pages (from-to)	267-272
Number of pages	6
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	444
Issue number	3-4
DOIs	https://doi.org/10.1016/S0370-2693(98)01416-6
Publication status	Published - 1998 Dec 24
Externally published	Yes

Bibliographical note

Funding Information:
We would like to thank the staff of the KEK proton synchrotron for their continuous support. We also thank Y. Akaishi, D.J. Millener and A. Ohnishi for valuable discussions. This work was supported in part by a Grant-in-Aid for Scientific Research (02402008), the Ministry of Science, Culture and Education, Japan, and the Basic Science Research Institute Program (BSRI-97-2408), Ministry of Education, Republic of Korea.

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1016/S0370-2693(98)01416-6

Cite this

Ahn, J. K., 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., ... 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, 444(3-4), 267-272. https://doi.org/10.1016/S0370-2693(98)01416-6

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. https://doi.org/10.1016/S0370-2693(98)01416-6

@article{bb367c475be14964afa0b04c0e44319e,

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

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.",

author = "Ahn, {J. K.} and S. Aoki and Chung, {K. S.} and Chung, {M. S.} and H. En'yo and T. Fukuda and H. Funahashi and Y. Goto and A. Higashi and M. Ieiri and T. Iijima and M. Iinuma and K. Imai and Y. Itow and Lee, {J. M.} and S. Makino and A. Masaike and Y. Matsuda and Y. Matsuyama and S. Mihara and C. Nagoshi and I. Nomura and Park, {I. S.} and N. Saito and M. Sekimoto and Shin, {Y. M.} and Sim, {K. S.} and R. Susukita and R. Takashima and F. Takeutchi and P. Tlust{\'y} and S. Weibe and S. Yokkaichi and K. Yoshida and M. Yoshida and T. Yoshida and S. Yamashita",

note = "Funding Information: We would like to thank the staff of the KEK proton synchrotron for their continuous support. We also thank Y. Akaishi, D.J. Millener and A. Ohnishi for valuable discussions. This work was supported in part by a Grant-in-Aid for Scientific Research (02402008), the Ministry of Science, Culture and Education, Japan, and the Basic Science Research Institute Program (BSRI-97-2408), Ministry of Education, Republic of Korea.",

year = "1998",

month = dec,

day = "24",

doi = "10.1016/S0370-2693(98)01416-6",

language = "English",

volume = "444",

pages = "267--272",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

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TY - JOUR

T1 - Enhanced Λ Λ production near threshold in the 12C(K-, K+) reaction KEK-PS E224 Collaboration

AU - Ahn, J. K.

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.

N1 - Funding Information: We would like to thank the staff of the KEK proton synchrotron for their continuous support. We also thank Y. Akaishi, D.J. Millener and A. Ohnishi for valuable discussions. This work was supported in part by a Grant-in-Aid for Scientific Research (02402008), the Ministry of Science, Culture and Education, Japan, and the Basic Science Research Institute Program (BSRI-97-2408), Ministry of Education, Republic of Korea.

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.

AB - 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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U2 - 10.1016/S0370-2693(98)01416-6

DO - 10.1016/S0370-2693(98)01416-6

M3 - Article

AN - SCOPUS:0346549755

SN - 0370-2693

VL - 444

SP - 267

EP - 272

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

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