Název: Neutral Kaon Photoproduction at LNS, Tohoku University
Autoři: Kaneta, M. ; Chiga, N. ; Beckford, B. ; Ejima, M. ; Fujii, T. ; Fujii, Y. ; Fujibayashi, T. ; Gogami, T. ; Futatsukawa, K. ; Hashimoto, O. ; Hosomi, K. ; Hirose, K. ; Iguchi, A. ; Kameoka, S. ; Kanda, 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, S. N. ; Nomura, H. ; Okuyama, A. ; Ohtani, A. ; Otani, T. ; 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, T. ; Yamauchi, H. ; Yokota, K. ; Ishikawa, T. ; Kinoshita, T. ; Miyahara, H. ; Nakabayashi, T. ; Shimizu, H. ; Suzuki, K. ; Tamae, T. ; Terasawa, T. ; Yamazaki, H. ; Han, Y. C. ; Wang, T. S. ; Sasaki, A. ; Konno, O. ; Bydžovský, Petr ; Sotona, Miloslav
Typ dokumentu: Příspěvky z konference
Konference/Akce: Sendai International Symposium on Strangeness in Nuclear and Hadronic Systems, Sendai (JP), 20081215
Rok: 2010
Jazyk: eng
Abstrakt: The elementary photo-strangeness production process has been intensively studied based on the high-quality data of the charged kaon channel, gamma + p -> K+ + Lambda(Sigma(0)). However, there had been no reliable data for the neutral kaon channel gamma + n -> K-0 Lambda(Sigma(0)) and the theoretical investigations suffer seriously from the lack of the data. In order to have reliable data for the neutral kaon photo-production data, substantial effort has been made to measure the gamma + n -> K-0 + A process in the pi(+)pi(-) decay channel, using a liquid deuterium target and a tagged photon beam (E-gamma = 0.8-1.1 GeV) in the threshold region at the Laboratory of Nuclear Science (LNS), Tohoku University. We have taken exploratory data quite successfully with the use of Neutral Kaon Spectrometer (NKS) at LNS-Tohoku in 2003 and 2004. The data is compared to theoretical models and it indicates a hint that the K-0 differential cross section has a backward peak in the energy region. The second generation of the experiment, 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 K-S(0)(Lambda) than that of NKS. The spectrometer is newly constructed and installed at the Laboratory of Nuclear Science, Tohoku University in 2005. The deuterium target data was taken with 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 K-0 + A coincidence measurement will be presented.
Klíčová slova: photoproduction; strangeness
Číslo projektu: GA202/05/2142 (CEP), GA202/08/0984 (CEP)
Poskytovatel projektu: GA ČR, GA ČR
Zdrojový dokument: Strangeness in Nuclear and Hadronic Systems, ISBN 978-981-4277-60-0

Instituce: Ústav jaderné fyziky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0281548

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-373406


Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav jaderné fyziky
Konferenční materiály > Příspěvky z konference