论文标题
KAON在非零温度和Baryon化学势下的性质
Properties of kaon at non-zero temperature and baryon chemical potential
论文作者
论文摘要
我们研究了热和致密QCD的框架中奇怪粒子Kaon的光谱特性。为此，首先，我们找到了扰动光谱密度，该密度与温度$ t $和BARYON化学势$μ__{B} $相连。我们将非扰动算子作为温度和重质量尺寸的bary型化学电位的功能包括在内。我们在动量空间中执行计算，并在热培养基中使用夸克传播器。在非零温度和巴属化学电位下的数值结果表明，粒子的质量通过在固定温度（零和非零温度）下提高巴属化学电位的质量大大增加，直至$μ__{b} = 0.4 $ gev。在此之后，它开始通过增加巴属化学电位而下降，并且显然以$μ__{b} =（1.03-1.15）=（1.03-1.15）$ GEV $ GEV：有限温度：明显消失的移动点通过升高温度而降低了baryon化学势。在零温度下，质量在较高的重骨化学势下达到大约固定值。另一方面，衰减常数在重约$μ_{b} = 0.4 $ GEV方面大大降低，但是在此点之后，在有限温度下的Baryon化学势方面，它开始增加。在$ t = 0 $时，衰减常数也达到了较高的化学势时的固定值。关于对温度的依赖性，我们观察到，在baryon化学电位的固定值下，质量和衰减常数分别保持不变，分别不变至$ t = 50 $ MEV和$ t = 70 $ MEV，但是在这些点开始下降，质量开始下降，并且衰减的持续不断下降，并开始上升至关键温度$ t = 155 $ MEV。
We investigate the spectroscopic properties of the strange particle kaon in the framework of hot and dense QCD. To this end, first, we find the perturbative spectral density, which is connected with both the temperature $T$ and the baryon chemical potential $μ_{B}$. We include the non-perturbative operators as functions of temperature and baryon chemical potential up to mass dimension five. We perform the calculations in momentum space and use the quark propagator in the hot and dense medium. The numerical results at non-zero temperature and baryon chemical potential demonstrate that the mass of the particle rises considerably by increasing the baryon chemical potential at a fixed temperature (for both the zero and non-zero temperatures) up to approximately $μ_{B}=0.4$ GeV. After this point, it starts to fall by increasing the baryon chemical potential and it apparently vanishes at $μ_{B}=(1.03-1.15)$ GeV for finite temperatures: The point of apparent vanishing moves to lower baryon chemical potentials by increasing the temperature. At zero temperature, the mass reaches to roughly a fixed value at higher baryon chemical potentials. On the other hand, the decay constant decreases considerably with respect to baryon chemical potential up to roughly $μ_{B}=0.4$ GeV, but after this point, it starts to increase in terms of the baryon chemical potential at finite temperatures. At $T=0$, the decay constant reaches to a fixed value at higher chemical potentials, as well. Regarding the dependence on the temperature we observe that, at fixed values of baryon chemical potentials, the mass and decay constant remain roughly unchanged up to $T=50$ MeV and $T=70$ MeV respectively, but after these points, the mass starts to fall and the decay constant starts to rise up to a critical temperature $T=155$ MeV, considerably.
