近阈值氘核的前向相干 φ 介子光生
核实验
2008-11-26 v2 高能物理 - 实验
摘要
首次使用线偏振光子在 = 1.5-2.4 GeV 于前向角测量了来自氘核的相干 φ 介子光生的微分截面和衰变不对称性。该反应提供了直接接近低能下自然宇称 Pomeron 动力学和胶子交换的独特途径。零度处的截面随光子能量增加而增加。衰变不对称性展示了自然宇称交换过程的完全主导，表明同位旋矢量非自然宇称 π 介子交换很小。然而，由同位标量 t 道交换过程贡献的从核子上 deduced 的 φ 介子截面不能用传统的 Pomeron 模型很好地描述。
引用
@article{arxiv.nucl-ex/0703034,
title = {Forward coherent $\phi$-meson photoproduction from deuterons near threshold},
author = {W. C. Chang and K. Horie and S. Shimizu and M. Miyabe and D. S. Ahn and J. K. Ahn and H. Akimune and Y. Asano and S. Date and H. Ejiri and S. Fukui and H. Fujimura and M. Fujiwara and S. Hasegawa and K. Hicks and T. Hotta and K. Imai and T. Ishikawa and T. Iwata and Y. Kato and H. Kawai and Z. Y. Kim and K. Kino and H. Kohri and N. Kumagai and P. J. Lin and S. Makino and T. Matsuda and T. Matsumura and N. Matsuoka and T. Mibe and Y. Miyachi and M. Morita and N. Muramatsu 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 T. Sasaki and P. M. Shagin and Y. Shiino and A. Shimizu 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:nucl-ex/0703034},
year = {2008}
}
备注
14 pages, 6 figures. Final published version