质子与氘核近阈 $\Lambda(1520)$ 光生
核实验
2009-09-02 v2
摘要
在SPring-8 LEPS实验中，利用液氢和液氘靶研究了光子能量低于2.4 GeV时的 (1520) 光生反应。首次在低能条件下并使用液氘靶测量了微分截面。在K 后向角处，观察到了质子和中子产生截面的巨大不对称性。这表明接触项的重要性，该接触项与t道K交换在规范不变性下共存。这一解释与在K 前向角处质子产生中测量到的微分截面、衰变不对称性以及光子束不对称性相吻合。
引用
@article{arxiv.0904.2034,
title = {Near-threshold photoproduction of $\Lambda(1520)$ from protons and deuterons},
author = {LEPS Collaboration and N. Muramatsu and J. Y. Chen and W. C. Chang and D. S. Ahn and J. K. Ahn and H. Akimune and Y. Asano and S. Daté and H. Ejiri and H. Fujimura and M. Fujiwara and S. Fukui and S. Hasegawa and K. Hicks and K. Horie and T. Hotta and K. Imai and T. Ishikawa and T. Iwata and Y. Kato and H. Kawai and K. Kino and H. Kohri and N. Kumagai and S. Makino and T. Matsuda and T. Matsumura and N. Matsuoka and T. Mibe and M. Miyabe and M. Miyachi and T. Nakano and M. Niiyama and M. Nomachi and Y. Ohashi and H. Ohkuma and T. Ooba and D. S. Oshuev and C. Rangacharyulu and A. Sakaguchi and P. M. Shagin and Y. Shiino and H. Shimizu and Y. Sugaya and M. Sumihama and Y. Toi and H. Toyokawa and A. Wakai and C. W. Wang and S. C. Wang and K. Yonehara and T. Yorita and M. Yoshimura and M. Yosoi and R. G. T. Zegers},
journal= {arXiv preprint arXiv:0904.2034},
year = {2009}
}
备注
5 pages and 4 figures. One reference added