利用漫射超新星中微子背景约束Chaobergin模型
Constraining Chaplygin models using diffuse supernova neutrino background
摘要：
在这项工作中，我们研究的可能性，使用弥漫超新星中微子背景（DSNB）来测试宇宙的Chaubergin气体（CG）模型。利用典型的超新星速率$R_{\mathrm{SN}}(z)$和超新星中微子谱$\mathrm{d} N(E_ν)/\mathrm{d} E_ν$，研究了广义CG（GCG）、修正CG（MCG）和扩展CG（ECG）模型下的DSNB通量谱$n(E_ν)$.结果表明，通量谱一般呈费米-狄拉克分布，峰值集中在3.80-3.97 MeV。光谱形状和峰位置主要由$R_{\mathrm{SN}}(z)$和$\mathrm{d} N(E_ν)/\mathrm{d} E_ν$确定，仅受CG模型的轻微影响。然而，对于不同的模型，CG模型的每个类别中的谱的高度可以显著地变化，GCG、MCG和ECG类别的方差分别为13.2%、23.6%和14.9%。各类别的平均总流量也不同，ECG模型平均比GCG和MCG模型高10.0%和12.7%。这表明DSNB通量谱高度和总通量可以用来约束CG模型参数，如果测量精度低于10%，则可以用来排除某些模型。
英文摘要：
In this work, we examine the possibility of using the diffuse supernova neutrino background (DSNB) to test the Chaplygin gas (CG) models of the Universe. With a typical supernova rate $R_{\mathrm{SN}}(z)$ and supernova neutrino spectrum $\mathrm{d} N(E_ν)/\mathrm{d} E_ν$, the DSNB flux spectrum $n(E_ν)$ in three categories of CG models, the generalized CG (GCG), modified CG (MCG) and extended CG (ECG) models, are studied. It is found that generally the flux spectra take a form similar to a Fermi-Dirac distribution with a peak centered around 3.80-3.97 MeV. The spectrum shape and peak positions are primarily determined by $R_{\mathrm{SN}}(z)$ and $\mathrm{d} N(E_ν)/\mathrm{d} E_ν$ and only slightly affected by the CG models. However, the height of the spectra in each category of the CG models can vary dramatically for different models, with variances of 13.2%, 23.6% and 14.9% for GCG, MCG and ECG categories respectively. The averaged total flux in each category are also different, with the ECG model average 10.0% and 12.7% higher than that of the GCG and MCG models. These suggest that the DSNB flux spectrum height and total flux can be used to constrain the CG model parameters, and if the measured to a sub-10% accuracy, might be used to rule out some models.
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。
