标题： 重整动理学场论中的重子-光子相互作用 显示英文标题

标题： Baryon-photon interactions in Resummed Kinetic Field Theory

摘要： 我们探讨了如何将重子与光子之间的相互作用纳入动力场论（KFT）中，这是一种基于经典哈密顿粒子动力学的宇宙结构形成描述方法。 在KFT中，重子被描述为表征流体力学方程控制的流体单元的有效介观粒子。 本文中，我们修改了介观粒子模型以包含通过与光子相互作用施加于重子物质的压力效应。 作为一个概念验证，我们使用这种扩展的介观模型来描述物质-辐射平等与复合之间紧密耦合的重子-光子流体。 我们展示了该模型能够定性再现宇宙功率谱中的重子声波振荡的形成。 显示英文摘要

摘要： We explore how interactions between baryons and photons can be incorporated into Kinetic Field Theory (KFT), a description of cosmic structure formation based on classical Hamiltonian particle dynamics. In KFT, baryons are described as effective mesoscopic particles which represent fluid elements governed by the hydrodynamic equations. In this paper, we modify the mesoscopic particle model to include pressure effects exerted on baryonic matter through interactions with photons. As a proof of concept, we use this extended mesoscopic model to describe the tightly coupled baryon-photon fluid between matter-radiation equality and recombination. We show that this model can qualitatively reproduce the formation of baryon-acoustic oscillations in the cosmological power spectrum.