η production in proton-nucleus collisions near threshold

YANG You-Chang; CHEN Hong; JIANG Huan-Qing

doi:10.1088/1674-1137/32/4/003

Chinese Physics C> 2008, Vol. 32> Issue(4) : 254-258 DOI: 10.1088/1674-1137/32/4/003

η production in proton-nucleus collisions near threshold

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Abstract：
The η-meson production in proton-nucleus (pA) collisions near threshold is studied within a relativistic 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 into η and nucleon pair(ηN). Taking ¹⁸O and ¹²C nuclei as examples, we evaluate the production 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.

References

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YANG You-Chang, CHEN Hong and JIANG Huan-Qing. η production in proton-nucleus collisions near threshold[J]. Chinese Physics C, 2008, 32(4): 254-258. doi: 10.1088/1674-1137/32/4/003

YANG You-Chang, CHEN Hong and JIANG Huan-Qing. η production in proton-nucleus collisions near threshold[J]. Chinese Physics C, 2008, 32(4): 254-258. doi: 10.1088/1674-1137/32/4/003 shu

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Received: 2007-06-21
Revised: 2007-07-30

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

η production in proton-nucleus collisions near threshold

Corresponding author: CHEN Hong,

Received Date: 2007-06-21

Accepted Date: 2007-07-30

Available Online: 2008-04-05

Abstract:

The η-meson production in proton-nucleus (pA) collisions near threshold is studied within a relativistic 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 into η and nucleon pair(ηN). Taking ¹⁸O and ¹²C nuclei as examples, we evaluate the production 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.

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η production in proton-nucleus collisions near threshold

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