发表机构
ICTP, International Centre for Theoretical Physics; University of Sussex（国际理论物理中心; 萨塞克斯大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究证明标准模型暖暴胀中规范螺旋度响应不能简化为摩擦系数，需动力学处理；反作用主要间接降低耗散比，并指出当前预言限于局部高斯输运闭合框架。
AI 中文摘要
标准模型暖暴胀（SMWI）将QCD作为暴胀耗散的微观起源，因此规范等离子体的实时响应进入宇宙学预言。我们证明，缓慢弛豫的规范螺旋度响应通常不能吸收进有效摩擦系数，而必须保持动力学性质。因此，我们演化夸克轴子密度和匹配的硬螺旋度模式，其中QCD瞬子过程和有效的$2\leftrightarrow3$道在完整微扰协方差系统中产生电荷转移和相关的随机源。由此产生的反作用显著但主要是间接的：在强分支上，规范螺旋度屏蔽可将暖耗散比降低一个量级为1的分数，而$2\leftrightarrow3$道直接贡献零密度瞬子摩擦的$0.2\\%-0.7\\%$，从而在$n_s$和$r_{\rm vac}$中改变振幅归一化的轨迹。然而，相关轨迹缺乏参数上宽的硬-软层次，并超出严格线性响应范围。因此，预言应在所述的局部高斯输运闭合框架内理解；无参数的标准模型（SM）结果需要有限亲和力的实时$SU(3)$漂移、磁化率和噪声核。
英文摘要
Standard-Model warm inflation (SMWI) makes QCD the microscopic origin of inflationary dissipation, so the real-time response of the gauge plasma enters the cosmological prediction. We show that a slowly relaxing gauge-helicity response cannot, in general, be absorbed into an effective friction coefficient and must instead remain dynamical. We therefore evolve the quark axial densities and a matched hard-helicity mode, with QCD sphalerons and an effective $2\leftrightarrow3$ channel generating both charge transfer and correlated stochastic sources in the full perturbation covariance system. The resulting backreaction is substantial but mainly indirect: gauge-helicity screening can reduce the warm dissipation ratio by an order-one fraction on the strong branch, while the $2\leftrightarrow3$ channel contributes only $0.2\%-0.7\%$ of the zero-density sphaleron friction directly, shifting the amplitude-normalized trajectory in both $n_s$ and $r_{\rm vac}$. The relevant trajectories, however, lack a parametrically broad hard-soft hierarchy and extend beyond strict linear response. The predictions should therefore be understood within the stated local Gaussian transport closure; a parameter-free Standard-Model (SM) result requires finite-affinity real-time $SU(3)$ drift, susceptibility, and noise kernels.
Comments30, pages, 14 figures + Appendices
