arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1302.4828hep-ph
收藏

IR改进的有限化学势软壁AdS/QCD模型中标量和赝标量介子的热质谱

Thermal Mass Spectra of Scalar and Pseudo-Scalar Mesons in IR-improved Soft-Wall AdS/QCD Model with Finite Chemical Potential

Ling-Xiao Cui, Yue-Liang Wu

摘要:

在红外改进的软壁AdS/QCD模型中研究了标量和赝标量介子的热质量谱。本文引入Reissner-Nordstrom AdS黑洞度规来描述有限温度和密度效应。计算得到的热谱函数表明,随着温度的升高,谱峰的位置向较小的值移动,谱峰的宽度也向较大的值加宽。已发现峰完全溶解的临界温度约为$T_{c}\simeq 160\sim 200\MeV$。结果表明,化学势的影响与温度的影响相同。发现当温度接近零$T\approx 0$时,介子在标度临界化学势$μ_0/κ\approx 2.2\sim 2.4 \GeV$处发生熔化。

英文摘要:

The thermal mass spectra of scalar and pseudo scalar mesons are studied in an IR-improved soft-wall AdS/QCD model. The Reissner-Nordstrom AdS black hole metric is introduced to describe both the finite temperature and density effects. The thermal spectral function is computed, which shows that the position of peak moves towards a smaller value and the width of peak also broadens to a larger value as the temperature increases. The critical temperature at which the peaks are completely dissolved has been found to be around $T_{c}\simeq 160\sim 200\MeV$. The effect of chemical potential is shown to be the same as the one caused by the temperature. It is found that when the temperature approaches to zero $T\approx 0$, the melting down of mesons occurs at the scaled critical chemical potential $μ_0/κ\approx 2.2\sim 2.4 \GeV$.

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。

↑