Photo-production of neutral kaons on 12C in the threshold region

T. Watanabe; P. Bydžovský; K. Dobashi; S. Endo; Yu Fujii; O. Hashimoto; T. Ishikawa; Keisuke Itoh; Hiroki Kanda; M. Katoh; T. Kinoshita; O. Konno; Kazushige Maeda; A. Matsumura; F. Miyahara; H. Miyase; T. Miyoshi; K. Mizunuma; Y. Miura; Satoshi Nakamura; H. Nomura; Y. Okayasu; T. Osaka; M. Oyamada; A. Sasaki; T. Satoh; Hajime Shimizu; M. Sotona; T. Takahashi; T. Tamae; H. Tamura; T. Terasawa; H. Tsubota; Kyo Tsukada; M. Ukai; M. Wakamatsu; H. Yamauchi; Hirohito Yamazaki

doi:10.1016/j.physletb.2007.06.033

Photo-production of neutral kaons on ¹²C in the threshold region

T. Watanabe, P. Bydžovský, K. Dobashi, S. Endo, Yu Fujii, O. Hashimoto, T. Ishikawa, Keisuke Itoh, Hiroki Kanda, M. Katoh, T. Kinoshita, O. Konno, Kazushige Maeda, A. Matsumura, F. Miyahara, H. Miyase, T. Miyoshi, K. Mizunuma, Y. Miura, Satoshi NakamuraH. Nomura, Y. Okayasu, T. Osaka, M. Oyamada, A. Sasaki, T. Satoh, Hajime Shimizu, M. Sotona, T. Takahashi, T. Tamae, H. Tamura, T. Terasawa, H. Tsubota, Kyo Tsukada, M. Ukai, M. Wakamatsu, H. Yamauchi, Hirohito Yamazaki

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

17 Citations (Scopus)

Abstract

The kaon photo-production process on ¹²C has been studied by measuring neutral kaons in the photon energy range of 0.8-1.1 GeV. Neutral kaons were identified by the invariant mass constructed from two charged pions emitted in the K_S⁰ → π⁺ π^- decay channel. The differential and integrated cross sections in the threshold photon energy region were obtained. The obtained momentum spectra were compared with a Spectator model calculation using elementary amplitudes of kaon photo-production given by recent isobar models. The present results provide the first information on the n (γ, K⁰) Λ reaction, which is expected to play an important role in constructing models of strangeness production by electromagnetic interactions. The experimental results show that the cross section of ¹²C (γ, K⁰) is of the same order as that of ¹²C (γ, K⁺) and suggest that a slightly backward K⁰ angular distribution is favored in the γ n → K⁰ Λ process.

Original language	English
Pages (from-to)	269-274
Number of pages	6
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	651
Issue number	4
DOIs	https://doi.org/10.1016/j.physletb.2007.06.033
Publication status	Published - 2007 Aug 2

Keywords

Cross section
Isobar model
Neutral kaon
Photo-production
Quasi-free reaction
Strangeness

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1016/j.physletb.2007.06.033

Cite this

Watanabe, T., Bydžovský, P., Dobashi, K., Endo, S., Fujii, Y., Hashimoto, O., Ishikawa, T., Itoh, K., Kanda, H., Katoh, M., Kinoshita, T., Konno, O., Maeda, K., Matsumura, A., Miyahara, F., Miyase, H., Miyoshi, T., Mizunuma, K., Miura, Y., ... Yamazaki, H. (2007). Photo-production of neutral kaons on ¹²C in the threshold region. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 651(4), 269-274. https://doi.org/10.1016/j.physletb.2007.06.033

Watanabe, T, Bydžovský, P, Dobashi, K, Endo, S, Fujii, Y, Hashimoto, O, Ishikawa, T, Itoh, K, Kanda, H, Katoh, M, Kinoshita, T, Konno, O, Maeda, K, Matsumura, A, Miyahara, F, Miyase, H, Miyoshi, T, Mizunuma, K, Miura, Y, Nakamura, S, Nomura, H, Okayasu, Y, Osaka, T, Oyamada, M, Sasaki, A, Satoh, T, Shimizu, H, Sotona, M, Takahashi, T, Tamae, T, Tamura, H, Terasawa, T, Tsubota, H, Tsukada, K, Ukai, M, Wakamatsu, M, Yamauchi, H & Yamazaki, H 2007, 'Photo-production of neutral kaons on ¹²C in the threshold region', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 651, no. 4, pp. 269-274. https://doi.org/10.1016/j.physletb.2007.06.033

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title = "Photo-production of neutral kaons on 12C in the threshold region",

abstract = "The kaon photo-production process on 12C has been studied by measuring neutral kaons in the photon energy range of 0.8-1.1 GeV. Neutral kaons were identified by the invariant mass constructed from two charged pions emitted in the KS0 → π+ π- decay channel. The differential and integrated cross sections in the threshold photon energy region were obtained. The obtained momentum spectra were compared with a Spectator model calculation using elementary amplitudes of kaon photo-production given by recent isobar models. The present results provide the first information on the n (γ, K0) Λ reaction, which is expected to play an important role in constructing models of strangeness production by electromagnetic interactions. The experimental results show that the cross section of 12C (γ, K0) is of the same order as that of 12C (γ, K+) and suggest that a slightly backward K0 angular distribution is favored in the γ n → K0 Λ process.",

keywords = "Cross section, Isobar model, Neutral kaon, Photo-production, Quasi-free reaction, Strangeness",

author = "T. Watanabe and P. Byd{\v z}ovsk{\'y} and K. Dobashi and S. Endo and Yu Fujii and O. Hashimoto and T. Ishikawa and Keisuke Itoh and Hiroki Kanda and M. Katoh and T. Kinoshita and O. Konno and Kazushige Maeda and A. Matsumura and F. Miyahara and H. Miyase and T. Miyoshi and K. Mizunuma and Y. Miura and Satoshi Nakamura and H. Nomura and Y. Okayasu and T. Osaka and M. Oyamada and A. Sasaki and T. Satoh and Hajime Shimizu and M. Sotona and T. Takahashi and T. Tamae and H. Tamura and T. Terasawa and H. Tsubota and Kyo Tsukada and M. Ukai and M. Wakamatsu and H. Yamauchi and Hirohito Yamazaki",

note = "Funding Information: The authors wish to thank the scientific and technical staff of LNS for the operation of the accelerator and for experimental supports. We are grateful to Prof. K. Maruyama and Prof. H. Okuno for their help with moving the TAGX spectrometer from the INS to Tohoku University. They also wish to thank Dr. T. Mart for useful discussions and for making available the program code. This work was supported by a Grant-In-Aid for Scientific Research from the Ministry of Education of Japan, Nos. 09304028, 12002001, and 16GS0201. T.T. acknowledges the support from a Grant-In-Aid for Scientific Research from the Ministry of Education of Japan, No. 14740150. P.B. and M.S. acknowledge support from the Grant Agency of the Czech Republic, Grant No. 202/05/2142.",

year = "2007",

month = aug,

day = "2",

doi = "10.1016/j.physletb.2007.06.033",

language = "English",

volume = "651",

pages = "269--274",

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

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TY - JOUR

T1 - Photo-production of neutral kaons on 12C in the threshold region

AU - Watanabe, T.

AU - Bydžovský, P.

AU - Dobashi, K.

AU - Endo, S.

AU - Fujii, Yu

AU - Hashimoto, O.

AU - Ishikawa, T.

AU - Itoh, Keisuke

AU - Kanda, Hiroki

AU - Katoh, M.

AU - Kinoshita, T.

AU - Konno, O.

AU - Maeda, Kazushige

AU - Matsumura, A.

AU - Miyahara, F.

AU - Miyase, H.

AU - Miyoshi, T.

AU - Mizunuma, K.

AU - Miura, Y.

AU - Nakamura, Satoshi

AU - Nomura, H.

AU - Okayasu, Y.

AU - Osaka, T.

AU - Oyamada, M.

AU - Sasaki, A.

AU - Satoh, T.

AU - Shimizu, Hajime

AU - Sotona, M.

AU - Takahashi, T.

AU - Tamae, T.

AU - Tamura, H.

AU - Terasawa, T.

AU - Tsubota, H.

AU - Tsukada, Kyo

AU - Ukai, M.

AU - Wakamatsu, M.

AU - Yamauchi, H.

AU - Yamazaki, Hirohito

N1 - Funding Information: The authors wish to thank the scientific and technical staff of LNS for the operation of the accelerator and for experimental supports. We are grateful to Prof. K. Maruyama and Prof. H. Okuno for their help with moving the TAGX spectrometer from the INS to Tohoku University. They also wish to thank Dr. T. Mart for useful discussions and for making available the program code. This work was supported by a Grant-In-Aid for Scientific Research from the Ministry of Education of Japan, Nos. 09304028, 12002001, and 16GS0201. T.T. acknowledges the support from a Grant-In-Aid for Scientific Research from the Ministry of Education of Japan, No. 14740150. P.B. and M.S. acknowledge support from the Grant Agency of the Czech Republic, Grant No. 202/05/2142.

PY - 2007/8/2

Y1 - 2007/8/2

N2 - The kaon photo-production process on 12C has been studied by measuring neutral kaons in the photon energy range of 0.8-1.1 GeV. Neutral kaons were identified by the invariant mass constructed from two charged pions emitted in the KS0 → π+ π- decay channel. The differential and integrated cross sections in the threshold photon energy region were obtained. The obtained momentum spectra were compared with a Spectator model calculation using elementary amplitudes of kaon photo-production given by recent isobar models. The present results provide the first information on the n (γ, K0) Λ reaction, which is expected to play an important role in constructing models of strangeness production by electromagnetic interactions. The experimental results show that the cross section of 12C (γ, K0) is of the same order as that of 12C (γ, K+) and suggest that a slightly backward K0 angular distribution is favored in the γ n → K0 Λ process.

AB - The kaon photo-production process on 12C has been studied by measuring neutral kaons in the photon energy range of 0.8-1.1 GeV. Neutral kaons were identified by the invariant mass constructed from two charged pions emitted in the KS0 → π+ π- decay channel. The differential and integrated cross sections in the threshold photon energy region were obtained. The obtained momentum spectra were compared with a Spectator model calculation using elementary amplitudes of kaon photo-production given by recent isobar models. The present results provide the first information on the n (γ, K0) Λ reaction, which is expected to play an important role in constructing models of strangeness production by electromagnetic interactions. The experimental results show that the cross section of 12C (γ, K0) is of the same order as that of 12C (γ, K+) and suggest that a slightly backward K0 angular distribution is favored in the γ n → K0 Λ process.

KW - Cross section

KW - Isobar model

KW - Neutral kaon

KW - Photo-production

KW - Quasi-free reaction

KW - Strangeness

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U2 - 10.1016/j.physletb.2007.06.033

DO - 10.1016/j.physletb.2007.06.033

M3 - Article

AN - SCOPUS:34447560038

SN - 0370-2693

VL - 651

SP - 269

EP - 274

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

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

IS - 4

ER -