| Autor: |
Chary Rangacharyulu, S. Hasegawa, S. Ajimura, Masaharu Nomachi, K. Yonehara, R. Murayama, H. Ejiri, H. Kawai, C. W. Wang, Jaw-Luen Tang, M. Ungaro, T. Sawada, Hidetoshi Akimune, Shuji Fukui, M. Yosoi, P. M. Shagin, H. Kohri, D. S. Ahn, N. Matsuoka, Hiroyuki Toyokawa, Yuji Ohashi, Y. Asano, T. Ooba, Atsushi Sakaguchi, Yorihito Sugaya, Tetsuhiko Yorita, Hajime Shimizu, Yoshikazu Maeda, A. O. Tokiyasu, T. Ishikawa, R. G. T. Zegers, Y. Toi, Norihito Muramatsu, K. Horie, S. Daté, Y. Shiino, N. Kumagai, M. Miyachi, S. Y. Ryu, A. Wakai, S. C. Wang, Joseph D. Parker, E. A. Strokovsky, K. Kino, S. Makino, Tsutomu Mibe, T. Matsuda, M. Uchida, D. L. Lin, Y. Kon, Y. Nakatsugawa, Manabu Miyabe, Tomoaki Hotta, J. K. Ahn, M. Niiyama, T. Nakano, J. Y. Chen, T. Matsumura, W. C. Chang, T. Iwata, Takashi Ohta, M. Fujiwara, T. Tsunemi, Kenichi Imai, Y. Kato, Masato Yoshimura, M. Sumihama, S. H. Hwang, K. Hicks, Haruo Ohkuma, H. Fujimura, D. S. Oshuev |
| Rok vydání: |
2014 |
| Předmět: |
|
| Zdroj: |
Physics Letters B. 728:616-621 |
| ISSN: |
0370-2693 |
| Popis: |
A search for the K − p p bound state (the lightest kaonic nucleus) has been performed using the γ d → K + π − X reaction at E γ = 1.5 – 2.4 GeV at LEPS/SPring-8. The differential cross section of the K + π − photo-production off deuterium ( d 2 σ / d cos θ K + l a b / d cos θ π − l a b ) has been measured for the first time in this energy region. A peak structure was searched for in the inclusive missing mass spectrum. A statistically significant peak structure was not observed in the region from 2.22 to 2.36 GeV/c2. The upper limits of the differential cross section of the K − p p bound state production were determined to be (0.17–0.55), (0.55–1.7) and (1.1–2.9) μb at 95% confidence level with the assumed widths of 20 MeV, 60 MeV and 100 MeV. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect