论文标题
星系成像调查是宇宙攻击者的自旋敏感探测器
Galaxy imaging surveys as spin-sensitive detector for cosmological colliders
论文作者
论文摘要
星系成像调查为我们提供了有关星系分布及其形状的信息。在本文中，我们系统地研究了在初始条件下星系形状对新物理的敏感性。为此，我们将星系形函数分解为自旋组件，并从固有比对和弱透镜中计算对每个自旋组件的贡献。然后，我们考虑了角度依赖性的原始非高斯性，在通货膨胀期间活跃时，非零整数自旋粒子产生，并表明星系成像调查基本上是早期宇宙中这种颗粒的自旋敏感检测器的作用。考虑到Rubin天文台类似LSST样的星系调查，我们还进行了从较高自旋粒子产生的PNG的预测。
Galaxy imaging surveys provide us with information on both the galaxy distribution and their shapes. In this paper, we systematically investigate the sensitivity of galaxy shapes to new physics in the initial conditions. For this purpose, we decompose the galaxy shape function into spin components, and compute the contributions to each spin component from both intrinsic alignment and weak lensing. We then consider the angular-dependent primordial non-Gaussianity, which is generated by a non-zero integer spin particle when active during inflation, and show that a galaxy imaging survey essentially functions as a spin-sensitive detector of such particles in the early universe. We also perform a forecast of the PNG generated from a higher spin particle, considering a Rubin Observatory LSST-like galaxy survey.
