The investigation of strangeness photoproduction in the threshold region at lns-tohoku

M. Kaneta; B. Beckford; M. Ejima; T. Fujii; Y. Fujii; T. Fujibayashi; T. Gogami; K. Futatsukawa; O. Hashimoto; K. Hosomi; K. Hirose; A. Lguchi; S. Kameoka; H. Kanda; H. Kato; D. Kawama; T. Kawasaki; C. Kimura; S. Kiyokawa; T. Koike; T. Kon; Y. Ma; K. Maeda; N. Maruyama; A. Matsumura; Y. Miyagi; Y. Miura; K. Miwa; S. N. Nakamura; H. Nomura; A. Okuyama; A. Ohtani; M. Sato; A. Shichijo; K. Shirotori; T. Takahashi; H. Tamura; N. Taniya; H. Tsubota; K. Tsukada; N. Terada; M. Ukai; D. Uchida; T. Watanabe; T. O. Yamamoto; H. Yamauchi; T. Ishikawa; T. Kinoshita; H. Miyahara; T. Nakabayashi; H. Shimizu; K. Suzuki; T. Tamae; T. Terasawa; H. Yamazaki; Y. C. Han; T. S. Wang; A. Sasaki; O. Konno; P. Bydzovsky; M. Sotona

The investigation of strangeness photoproduction in the threshold region at lns-tohoku

M. Kaneta, B. Beckford, M. Ejima, T. Fujii, Y. Fujii, T. Fujibayashi, T. Gogami, K. Futatsukawa, O. Hashimoto, K. Hosomi, K. Hirose, A. Lguchi, S. Kameoka, H. Kanda, H. Kato, D. Kawama, T. Kawasaki, C. Kimura, S. Kiyokawa, T. KoikeT. Kon, Y. Ma, K. Maeda, N. Maruyama, A. Matsumura, Y. Miyagi, Y. Miura, K. Miwa, S. N. Nakamura, H. Nomura, A. Okuyama, A. Ohtani, M. Sato, A. Shichijo, K. Shirotori, T. Takahashi, H. Tamura, N. Taniya, H. Tsubota, K. Tsukada, N. Terada, M. Ukai, D. Uchida, T. Watanabe, T. O. Yamamoto, H. Yamauchi, T. Ishikawa, T. Kinoshita, H. Miyahara, T. Nakabayashi, H. Shimizu, K. Suzuki, T. Tamae, T. Terasawa, H. Yamazaki, Y. C. Han, T. S. Wang, A. Sasaki, O. Konno, P. Bydzovsky, M. Sotona

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

The strangeness photoproduction process has been intensively studied based on the high-quality data of the charged kaon channel, γ + p → K ⁺ + Λ(ε⁰). On the other hand, there was no reliable data for the neutral kaon channel γ+n + K ⁰+Λ(ε⁰). The theoretical investigations suffer seriously from the lack of the data. A Substantial effort has been made to measure the γ+n + K⁰+Λ process in the K⁰ _s → π⁺π^- decay channel, using a liquid deuterium target and a tagged photon beam (E_γ = 0.8-1.1 GeV ) in the threshold region at Laboratory of Nuclear Science (LNS), Tohoku University. We have taken exploratory data quite successfully with use of Neutral Kaon Spectrometer (NKS) at LNS-Tohoku in 2003 and 2004. The data is compared theoretical models and it indicates a hint that the K⁰ differential cross section has a backward peak in the energy region. The second generation of the experiment, named NKS2, is designed to extend the NKS experiment by considerably upgrading the original neutral kaon spectrometer, fully replacing the spectrometer magnet, tracking detectors and all the trigger counters. The new spectrometer NKS2 has significantly larger acceptance for neutral kaons compared with NKS, particularly covering forward angles and much better invariant mass resolution. The estimated acceptance of NKS2 is three (ten) times larger for K⁰_s(Λ) than that of NKS. The spectrometer is newly constructed and installed at LNS, Tohoku University in 2005. The deuterium target data was taken with the tagged photon beam in 2006-2007. We will report recent results of NKS2 in this paper. Additionally, a status of the upgrade project that gives us larger acceptance and capability of K⁰ +Λ coincidence measurement will be repsented.

Original language	English
Title of host publication	Hadron and Nuclear Physics 2009, HNP 2009
Pages	51-60
Number of pages	10
Publication status	Published - 2010
Event	Hadron and Nuclear Physics 2009, HNP 2009 - Osaka, Japan Duration: 2009 Nov 16 → 2009 Nov 19

Publication series

Name	Hadron and Nuclear Physics 2009, HNP 2009

Conference

Conference	Hadron and Nuclear Physics 2009, HNP 2009
Country/Territory	Japan
City	Osaka
Period	09/11/16 → 09/11/19

Keywords

Photoproduction
Strangeness

Cite this

Kaneta, M., Beckford, B., Ejima, M., Fujii, T., Fujii, Y., Fujibayashi, T., Gogami, T., Futatsukawa, K., Hashimoto, O., Hosomi, K., Hirose, K., Lguchi, A., Kameoka, S., Kanda, H., Kato, H., Kawama, D., Kawasaki, T., Kimura, C., Kiyokawa, S., ... Sotona, M. (2010). The investigation of strangeness photoproduction in the threshold region at lns-tohoku. In Hadron and Nuclear Physics 2009, HNP 2009 (pp. 51-60). (Hadron and Nuclear Physics 2009, HNP 2009).

@inproceedings{05c3320ba40944ab978e954b468772e3,

title = "The investigation of strangeness photoproduction in the threshold region at lns-tohoku",

abstract = "The strangeness photoproduction process has been intensively studied based on the high-quality data of the charged kaon channel, γ + p → K + + Λ(ε0). On the other hand, there was no reliable data for the neutral kaon channel γ+n + K 0+Λ(ε0). The theoretical investigations suffer seriously from the lack of the data. A Substantial effort has been made to measure the γ+n + K0+Λ process in the K0 s → π+π- decay channel, using a liquid deuterium target and a tagged photon beam (Eγ = 0.8-1.1 GeV ) in the threshold region at Laboratory of Nuclear Science (LNS), Tohoku University. We have taken exploratory data quite successfully with use of Neutral Kaon Spectrometer (NKS) at LNS-Tohoku in 2003 and 2004. The data is compared theoretical models and it indicates a hint that the K0 differential cross section has a backward peak in the energy region. The second generation of the experiment, named NKS2, is designed to extend the NKS experiment by considerably upgrading the original neutral kaon spectrometer, fully replacing the spectrometer magnet, tracking detectors and all the trigger counters. The new spectrometer NKS2 has significantly larger acceptance for neutral kaons compared with NKS, particularly covering forward angles and much better invariant mass resolution. The estimated acceptance of NKS2 is three (ten) times larger for K0s(Λ) than that of NKS. The spectrometer is newly constructed and installed at LNS, Tohoku University in 2005. The deuterium target data was taken with the tagged photon beam in 2006-2007. We will report recent results of NKS2 in this paper. Additionally, a status of the upgrade project that gives us larger acceptance and capability of K0 +Λ coincidence measurement will be repsented.",

keywords = "Photoproduction, Strangeness",

author = "M. Kaneta and B. Beckford and M. Ejima and T. Fujii and Y. Fujii and T. Fujibayashi and T. Gogami and K. Futatsukawa and O. Hashimoto and K. Hosomi and K. Hirose and A. Lguchi and S. Kameoka and H. Kanda and H. Kato and D. Kawama and T. Kawasaki and C. Kimura and S. Kiyokawa and T. Koike and T. Kon and Y. Ma and K. Maeda and N. Maruyama and A. Matsumura and Y. Miyagi and Y. Miura and K. Miwa and Nakamura, {S. N.} and H. Nomura and A. Okuyama and A. Ohtani and M. Sato and A. Shichijo and K. Shirotori and T. Takahashi and H. Tamura and N. Taniya and H. Tsubota and K. Tsukada and N. Terada and M. Ukai and D. Uchida and T. Watanabe and Yamamoto, {T. O.} and H. Yamauchi and T. Ishikawa and T. Kinoshita and H. Miyahara and T. Nakabayashi and H. Shimizu and K. Suzuki and T. Tamae and T. Terasawa and H. Yamazaki and Han, {Y. C.} and Wang, {T. S.} and A. Sasaki and O. Konno and P. Bydzovsky and M. Sotona",

year = "2010",

language = "English",

isbn = "9814313920",

series = "Hadron and Nuclear Physics 2009, HNP 2009",

pages = "51--60",

booktitle = "Hadron and Nuclear Physics 2009, HNP 2009",

note = "Hadron and Nuclear Physics 2009, HNP 2009 ; Conference date: 16-11-2009 Through 19-11-2009",

}

Kaneta, M, Beckford, B, Ejima, M, Fujii, T, Fujii, Y, Fujibayashi, T, Gogami, T, Futatsukawa, K, Hashimoto, O, Hosomi, K, Hirose, K, Lguchi, A, Kameoka, S, Kanda, H, Kato, H, Kawama, D, Kawasaki, T, Kimura, C, Kiyokawa, S, Koike, T, Kon, T, Ma, Y, Maeda, K, Maruyama, N, Matsumura, A, Miyagi, Y, Miura, Y, Miwa, K, Nakamura, SN, Nomura, H, Okuyama, A, Ohtani, A, Sato, M, Shichijo, A, Shirotori, K, Takahashi, T, Tamura, H, Taniya, N, Tsubota, H, Tsukada, K, Terada, N, Ukai, M, Uchida, D, Watanabe, T, Yamamoto, TO, Yamauchi, H, Ishikawa, T, Kinoshita, T, Miyahara, H, Nakabayashi, T, Shimizu, H, Suzuki, K, Tamae, T, Terasawa, T, Yamazaki, H, Han, YC, Wang, TS, Sasaki, A, Konno, O, Bydzovsky, P & Sotona, M 2010, The investigation of strangeness photoproduction in the threshold region at lns-tohoku. in Hadron and Nuclear Physics 2009, HNP 2009. Hadron and Nuclear Physics 2009, HNP 2009, pp. 51-60, Hadron and Nuclear Physics 2009, HNP 2009, Osaka, Japan, 09/11/16.

TY - GEN

T1 - The investigation of strangeness photoproduction in the threshold region at lns-tohoku

AU - Kaneta, M.

AU - Beckford, B.

AU - Ejima, M.

AU - Fujii, T.

AU - Fujii, Y.

AU - Fujibayashi, T.

AU - Gogami, T.

AU - Futatsukawa, K.

AU - Hashimoto, O.

AU - Hosomi, K.

AU - Hirose, K.

AU - Lguchi, A.

AU - Kameoka, S.

AU - Kanda, H.

AU - Kato, H.

AU - Kawama, D.

AU - Kawasaki, T.

AU - Kimura, C.

AU - Kiyokawa, S.

AU - Koike, T.

AU - Kon, T.

AU - Ma, Y.

AU - Maeda, K.

AU - Maruyama, N.

AU - Matsumura, A.

AU - Miyagi, Y.

AU - Miura, Y.

AU - Miwa, K.

AU - Nakamura, S. N.

AU - Nomura, H.

AU - Okuyama, A.

AU - Ohtani, A.

AU - Sato, M.

AU - Shichijo, A.

AU - Shirotori, K.

AU - Takahashi, T.

AU - Tamura, H.

AU - Taniya, N.

AU - Tsubota, H.

AU - Tsukada, K.

AU - Terada, N.

AU - Ukai, M.

AU - Uchida, D.

AU - Watanabe, T.

AU - Yamamoto, T. O.

AU - Yamauchi, H.

AU - Ishikawa, T.

AU - Kinoshita, T.

AU - Miyahara, H.

AU - Nakabayashi, T.

AU - Shimizu, H.

AU - Suzuki, K.

AU - Tamae, T.

AU - Terasawa, T.

AU - Yamazaki, H.

AU - Han, Y. C.

AU - Wang, T. S.

AU - Sasaki, A.

AU - Konno, O.

AU - Bydzovsky, P.

AU - Sotona, M.

PY - 2010

Y1 - 2010

N2 - The strangeness photoproduction process has been intensively studied based on the high-quality data of the charged kaon channel, γ + p → K + + Λ(ε0). On the other hand, there was no reliable data for the neutral kaon channel γ+n + K 0+Λ(ε0). The theoretical investigations suffer seriously from the lack of the data. A Substantial effort has been made to measure the γ+n + K0+Λ process in the K0 s → π+π- decay channel, using a liquid deuterium target and a tagged photon beam (Eγ = 0.8-1.1 GeV ) in the threshold region at Laboratory of Nuclear Science (LNS), Tohoku University. We have taken exploratory data quite successfully with use of Neutral Kaon Spectrometer (NKS) at LNS-Tohoku in 2003 and 2004. The data is compared theoretical models and it indicates a hint that the K0 differential cross section has a backward peak in the energy region. The second generation of the experiment, named NKS2, is designed to extend the NKS experiment by considerably upgrading the original neutral kaon spectrometer, fully replacing the spectrometer magnet, tracking detectors and all the trigger counters. The new spectrometer NKS2 has significantly larger acceptance for neutral kaons compared with NKS, particularly covering forward angles and much better invariant mass resolution. The estimated acceptance of NKS2 is three (ten) times larger for K0s(Λ) than that of NKS. The spectrometer is newly constructed and installed at LNS, Tohoku University in 2005. The deuterium target data was taken with the tagged photon beam in 2006-2007. We will report recent results of NKS2 in this paper. Additionally, a status of the upgrade project that gives us larger acceptance and capability of K0 +Λ coincidence measurement will be repsented.

AB - The strangeness photoproduction process has been intensively studied based on the high-quality data of the charged kaon channel, γ + p → K + + Λ(ε0). On the other hand, there was no reliable data for the neutral kaon channel γ+n + K 0+Λ(ε0). The theoretical investigations suffer seriously from the lack of the data. A Substantial effort has been made to measure the γ+n + K0+Λ process in the K0 s → π+π- decay channel, using a liquid deuterium target and a tagged photon beam (Eγ = 0.8-1.1 GeV ) in the threshold region at Laboratory of Nuclear Science (LNS), Tohoku University. We have taken exploratory data quite successfully with use of Neutral Kaon Spectrometer (NKS) at LNS-Tohoku in 2003 and 2004. The data is compared theoretical models and it indicates a hint that the K0 differential cross section has a backward peak in the energy region. The second generation of the experiment, named NKS2, is designed to extend the NKS experiment by considerably upgrading the original neutral kaon spectrometer, fully replacing the spectrometer magnet, tracking detectors and all the trigger counters. The new spectrometer NKS2 has significantly larger acceptance for neutral kaons compared with NKS, particularly covering forward angles and much better invariant mass resolution. The estimated acceptance of NKS2 is three (ten) times larger for K0s(Λ) than that of NKS. The spectrometer is newly constructed and installed at LNS, Tohoku University in 2005. The deuterium target data was taken with the tagged photon beam in 2006-2007. We will report recent results of NKS2 in this paper. Additionally, a status of the upgrade project that gives us larger acceptance and capability of K0 +Λ coincidence measurement will be repsented.

KW - Photoproduction

KW - Strangeness

UR - http://www.scopus.com/inward/record.url?scp=84885677955&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84885677955&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:84885677955

SN - 9814313920

SN - 9789814313926

T3 - Hadron and Nuclear Physics 2009, HNP 2009

SP - 51

EP - 60

BT - Hadron and Nuclear Physics 2009, HNP 2009

T2 - Hadron and Nuclear Physics 2009, HNP 2009

Y2 - 16 November 2009 through 19 November 2009

ER -

The investigation of strangeness photoproduction in the threshold region at lns-tohoku

Abstract

Publication series

Conference

Keywords

Other files and links

Fingerprint

Cite this