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arXiv 1101.1192nucl-thhep-phnucl-ex
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研究部分手征对称性恢复的η衰变产物选择方法

A method of eta' decay product selection to study partial chiral symmetry restoration

Mate Csanad, Monika Kofarago

摘要:

在手征U_A(1)对称性恢复的情况下,eta'玻色子(第九种可能的Goldstone玻色子)的质量降低,从而产生的截面大大增加。eta'衰变(通过它的一个衰变通道)成五个π介子。这些π介子在玻色-爱因斯坦关联中是不相关的,因此产生的增强改变了低动量下两π关联函数的强度。初步结果强烈支持eta'玻色子的质量减少。本文提出了一种从η衰变中选择π介子的方法。我们调查的效率,建议的运动学切割在几个碰撞系统和能量与几个模拟器。我们证明了我们的方法可以用于所有研究过的碰撞系统。

英文摘要:

In case of chiral U_A(1) symmetry restoration the mass of the eta' boson (the ninth, would-be Goldstone boson) is decreased, thus its production cross section is heavily enhanced. The eta' decays (through one of its decay channels) into five pions. These pions will not be correlated in terms of Bose-Einsten correlations, thus the production enhancement changes the strength of two-pion correlation functions at low momentum. Preliminary results strongly support the mass decrease of the eta' boson. In this paper we propose a method to select pions coming from eta' decays. We investigate the efficiency of the proposed kinematical cut in several collision systems and energies with several simulators. We prove that our method can be used in all investigeted collision systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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