η production in proton-nucleus collisions near threshold

被引：1
|
作者：
杨友昌
陈洪
姜焕清
机构：
[1] Chinese Academy of Sciences
[2] Beijing 100049
[3] China Department of Physics
[4] Lanzhou 730000
[5] China Institute of High Energy Physics
[6] Chongqing 400715
[7] National Laboratory of Heavy Ion Accelerator
[8] Zunyi 563002
[9] School of Physical Science and Technology Southwest University
[10] China Center of Theoretical Nuclear Physics
[11] Zunyi Normal College
来源：
中国物理C | 2008年 / 04期
基金：
中国国家自然科学基金;
关键词：
η; meson; proton-nucleus collision; N~*(1535);
D O I：
暂无
中图分类号：
O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
The η-meson production in proton-nucleus (pA) collisions near threshold is studied within a rela- tivistic meson-exchange model.The primary production amplitude is presented in the distorted-wave impulse approximation for the nucleus with isospin 0 or 1 by assuming that N~*(1535) is excited via a meson exchange and then decays intoηand nucleon pair(ηN).TakingO andC nuclei as examples,we evaluate the pro- duction cross sections as a function of the incident proton energy,and analyze the effects of nuclear medium and various meson-exchange contributions.Finally we discuss implications for further experimental studies at the Cooling Storage Ring (CSR) in Lanzhou.
引用
收藏
页码：254 / 258
页数：5
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