1. Near-ThresholdΛ(1520)Production by theγ→p→K+Λ(1520)Reaction at ForwardK+Angles
- Author
-
T. Matsuda, Z. Y. Kim, S. I. Nam, J. K. Ahn, H. Kawai, Akira Shimizu, Tetsuhiko Yorita, T. Ooba, S. C. Wang, W. C. Chang, Tsutomu Mibe, P. M. Shagin, H. Kohri, Alexander I. Titov, T. Ishikawa, Masaharu Nomachi, Y. Shiino, M. Niiyama, Hajime Shimizu, H. Fujimura, Y. Asano, D. S. Ahn, Chary Rangacharyulu, C. W. Wang, A. Wakai, Tomoaki Hotta, R. G. T. Zegers, N. Matsuoka, Y. Toi, K. Imai, Y. Miyachi, S. Daté, T. Nakano, M. Fujiwara, Takuya Sasaki, S. Makino, N. Kumagai, K. Yonehara, M. Sumihama, Hiroyuki Toyokawa, Masato Yoshimura, Yuji Ohashi, Atsushi Hosaka, Mizuki Morita, K. Kino, H. Ejiri, S. Hasegawa, K. Hicks, Haruo Ohkuma, Hidetoshi Akimune, D. S. Oshuev, Atsushi Sakaguchi, T. Iwata, M. Miyabe, T. Matsumura, Shuji Fukui, M. Yosoi, Yorihito Sugaya, and Norihito Muramatsu
- Subjects
Physics ,Baryon ,Meson ,Hadron ,General Physics and Astronomy ,Production (computer science) ,Elementary particle ,Atomic physics ,Nuclear Experiment ,Nucleon ,Lambda baryon ,Resonance (particle physics) - Abstract
Differential cross sections and photon-beam asymmetries for the $\stackrel{\ensuremath{\rightarrow}}{\ensuremath{\gamma}}p\ensuremath{\rightarrow}{K}^{+}\ensuremath{\Lambda}(1520)$ reaction have been measured with linearly polarized photon beams at energies from the threshold to 2.4 GeV at $0.6l\mathrm{cos} {\ensuremath{\theta}}_{\mathrm{c}.\mathrm{m}.}^{K}l1$. A new bump structure was found at $W\ensuremath{\simeq}2.11\text{ }\text{ }\mathrm{GeV}$ in the cross sections. The bump is not well reproduced by theoretical calculations introducing a nucleon resonance with $J\ensuremath{\le}\frac{3}{2}$. This result suggests that the bump might be produced by a nucleon resonance possibly with $J\ensuremath{\ge}\frac{5}{2}$ or by a new reaction process, for example, an interference effect with the $\ensuremath{\phi}$ photoproduction having a similar bump structure in the cross sections.
- Published
- 2010
- Full Text
- View/download PDF