与Planck2018数据对抗的超势快子暴胀的某些问题
Some Aspects of the Tachyon Inflation with Superpotential in Confrontation with Planck2018 Data
摘要：
我们研究了超势作为暴胀势时的快子暴胀。我们研究了等边组态中的原始扰动及其非高斯性质。利用Planck 2018 TT，TE，EE+lowE+透镜+BK 14 +BAO联合观测数据，在$68\%$ CL和$95\%$ CL对标量扰动进行数值分析，寻求超势快子暴胀的观测可行性。我们还通过研究扰动的张量部分并将结果与Planck 2018 TT，TE，EE+lowE+透镜+BK 14 +BAO+ LIGO $\&$ Virgo 2016联合数据在$68\%$ CL和$95\%$ CL进行比较来检查模型的观测可行性。通过对模型参数相空间的研究，预测了该模型中等边非高斯性的幅值。通货膨胀后的再加热阶段是本文探讨的另一个问题。我们表明，在一定范围内的模型的参数，这是可能的，有一个观测上可行的快子模型与超势。
英文摘要：
We study the tachyon inflation in the presence of the superpotential as an inflationary potential. We study the primordial perturbations and their non-gaussian feature in the equilateral configuration. We use the Planck2018 TT, TE, EE+lowE+lensing+BK14+BAO joint data at $68\%$ CL and $95\%$ CL, to perform numerical analysis on the scalar perturbations and seek for the observational viability of the tachyon inflation with superpotential. We also check the observational viability of the model by studying the tensor part of the perturbations and comparing the results with Planck2018 TT, TE, EE+lowE+lensing+BK14+BAO+ LIGO$\&$Virgo2016 joint data at $68\%$ CL and $95\%$ CL. By studying the phase space of the model's parameters, we predict the amplitude of the equilateral non-gaussianity in this model. The reheating phase after inflation is another issue that is explored in this paper. We show that, in some ranges of the model's parameters, it is possible to have an observationally viable tachyon model with superpotential.
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