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

页码：254 / 258

页数：5

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