Scalar and vector meson production and two-step processes in the (K-, K+) reaction on 12C

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/S0375-9474(97)81462-5

Scalar and vector meson production and two-step processes in the (K^-, K⁺) reaction on ¹²C

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

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Abstract

The double strangeness exchange reaction (K^-, K⁺) is investigated with respect to the sub-threshold production of scalar and vector mesons (f₀/a₀/φ) decaying into K⁺ K^- and the two-step processes induced by intermediate mesons and Ξ^- hyperons at p_K- = 1.66 GeV/c using a scintillating fiber active target. The differential cross section ((dσ/dΩ_L)) averaged over the angular interval (2.3⁰ ≤ θ^L_K+ ≤ 14.7⁰) for the sub-threshold f₀/a₀/φ meson production with the K⁺ K^- decay is 11 ± 6 μb/sr at 0.6 ≤ p_K+ < 0.95 GeV/c. The present result differs significantly from the theoretical calculation which predicts the contribution of the f₀/a₀/φ meson production to be predominant in the (K^-, K⁺) reaction below p_K+ = 0.95 GeV/c. We found a sizable contribution from two-step (K^-, K⁺) processes, characterized by production of two S = - 1 hyperons, consistent with the result of the intra-nuclear cascade (INC) model calculation with respect to the meson-induced hyperon (or hyperon resonance) pair production in the momentum region 0.6 ≤ p_K+ < 0.95 GeV/c. The observed enhancement of the cross section for the two-step ΛΛ production beyond the prediction of the INC model at p_K+ ≃ 1.1 GeV/c could be due to the Ξ^- p → ΛΛ reaction in ¹²C.

Original language	English
Pages (from-to)	231-250
Number of pages	20
Journal	Nuclear Physics A
Volume	625
Issue number	1-2
DOIs	https://doi.org/10.1016/S0375-9474(97)81462-5
Publication status	Published - Oct 27 1997
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1016/S0375-9474(97)81462-5

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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. (1997). Scalar and vector meson production and two-step processes in the (K^-, K⁺) reaction on ¹²C. Nuclear Physics A, 625(1-2), 231-250. https://doi.org/10.1016/S0375-9474(97)81462-5

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 1997, 'Scalar and vector meson production and two-step processes in the (K^-, K⁺) reaction on ¹²C', Nuclear Physics A, vol. 625, no. 1-2, pp. 231-250. https://doi.org/10.1016/S0375-9474(97)81462-5

@article{aa130086bead4687ac60d0260c89f776,

title = "Scalar and vector meson production and two-step processes in the (K-, K+) reaction on 12C",

abstract = "The double strangeness exchange reaction (K-, K+) is investigated with respect to the sub-threshold production of scalar and vector mesons (f0/a0/φ) decaying into K+ K- and the two-step processes induced by intermediate mesons and Ξ- hyperons at pK- = 1.66 GeV/c using a scintillating fiber active target. The differential cross section ((dσ/dΩL)) averaged over the angular interval (2.30 ≤ θLK+ ≤ 14.70) for the sub-threshold f0/a0/φ meson production with the K+ K- decay is 11 ± 6 μb/sr at 0.6 ≤ pK+ < 0.95 GeV/c. The present result differs significantly from the theoretical calculation which predicts the contribution of the f0/a0/φ meson production to be predominant in the (K-, K+) reaction below pK+ = 0.95 GeV/c. We found a sizable contribution from two-step (K-, K+) processes, characterized by production of two S = - 1 hyperons, consistent with the result of the intra-nuclear cascade (INC) model calculation with respect to the meson-induced hyperon (or hyperon resonance) pair production in the momentum region 0.6 ≤ pK+ < 0.95 GeV/c. The observed enhancement of the cross section for the two-step ΛΛ production beyond the prediction of the INC model at pK+ ≃ 1.1 GeV/c could be due to the Ξ- p → ΛΛ reaction in 12C.",

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",

year = "1997",

month = oct,

day = "27",

doi = "10.1016/S0375-9474(97)81462-5",

language = "English",

volume = "625",

pages = "231--250",

journal = "Nuclear Physics A",

issn = "0375-9474",

publisher = "Elsevier",

number = "1-2",

}

TY - JOUR

T1 - Scalar and vector meson production and two-step processes in the (K-, K+) reaction on 12C

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.

PY - 1997/10/27

Y1 - 1997/10/27

N2 - The double strangeness exchange reaction (K-, K+) is investigated with respect to the sub-threshold production of scalar and vector mesons (f0/a0/φ) decaying into K+ K- and the two-step processes induced by intermediate mesons and Ξ- hyperons at pK- = 1.66 GeV/c using a scintillating fiber active target. The differential cross section ((dσ/dΩL)) averaged over the angular interval (2.30 ≤ θLK+ ≤ 14.70) for the sub-threshold f0/a0/φ meson production with the K+ K- decay is 11 ± 6 μb/sr at 0.6 ≤ pK+ < 0.95 GeV/c. The present result differs significantly from the theoretical calculation which predicts the contribution of the f0/a0/φ meson production to be predominant in the (K-, K+) reaction below pK+ = 0.95 GeV/c. We found a sizable contribution from two-step (K-, K+) processes, characterized by production of two S = - 1 hyperons, consistent with the result of the intra-nuclear cascade (INC) model calculation with respect to the meson-induced hyperon (or hyperon resonance) pair production in the momentum region 0.6 ≤ pK+ < 0.95 GeV/c. The observed enhancement of the cross section for the two-step ΛΛ production beyond the prediction of the INC model at pK+ ≃ 1.1 GeV/c could be due to the Ξ- p → ΛΛ reaction in 12C.

AB - The double strangeness exchange reaction (K-, K+) is investigated with respect to the sub-threshold production of scalar and vector mesons (f0/a0/φ) decaying into K+ K- and the two-step processes induced by intermediate mesons and Ξ- hyperons at pK- = 1.66 GeV/c using a scintillating fiber active target. The differential cross section ((dσ/dΩL)) averaged over the angular interval (2.30 ≤ θLK+ ≤ 14.70) for the sub-threshold f0/a0/φ meson production with the K+ K- decay is 11 ± 6 μb/sr at 0.6 ≤ pK+ < 0.95 GeV/c. The present result differs significantly from the theoretical calculation which predicts the contribution of the f0/a0/φ meson production to be predominant in the (K-, K+) reaction below pK+ = 0.95 GeV/c. We found a sizable contribution from two-step (K-, K+) processes, characterized by production of two S = - 1 hyperons, consistent with the result of the intra-nuclear cascade (INC) model calculation with respect to the meson-induced hyperon (or hyperon resonance) pair production in the momentum region 0.6 ≤ pK+ < 0.95 GeV/c. The observed enhancement of the cross section for the two-step ΛΛ production beyond the prediction of the INC model at pK+ ≃ 1.1 GeV/c could be due to the Ξ- p → ΛΛ reaction in 12C.

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UR - http://www.scopus.com/inward/citedby.url?scp=0031588298&partnerID=8YFLogxK

U2 - 10.1016/S0375-9474(97)81462-5

DO - 10.1016/S0375-9474(97)81462-5

M3 - Article

AN - SCOPUS:0031588298

SN - 0375-9474

VL - 625

SP - 231

EP - 250

JO - Nuclear Physics A

JF - Nuclear Physics A

IS - 1-2

ER -

Scalar and vector meson production and two-step processes in the (K^-, K⁺) reaction on ¹²C

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