论文标题
宇宙对撞机的大型Spin-2信号
Large Spin-2 Signals at the Cosmological Collider
论文作者
论文摘要
我们研究具有非零背景化学潜力的通货膨胀期间大量自旋2场的理论和现象学，并将宇宙撞机物理学扩展到张量模式。我们为大型的Spin-2字段确定了独特的尺寸5和均衡化学势算子，这导致了一个无鬼的线性理论传播一个标量模式和两种张量模式。即使对于非常重的自旋2颗粒，化学势也会大大提高一种张量模式的产生，从而导致大型宇宙撞机的大型宇宙撞机信号。大信号在曲率三光谱和张量曲面混合双光谱中显示在树级别。
We study the theory and phenomenology of massive spin-2 fields during the inflation with nonzero background chemical potential, and extend the cosmological collider physics to tensor modes. We identify a unique dimension-5 and parity-violating chemical potential operator for massive spin-2 fields, which leads to a ghost-free linear theory propagating one scalar mode and two tensor modes. The chemical potential greatly boosts the production of one tensor mode even for very heavy spin-2 particles, and thereby leads to large and distinct cosmological collider signals for massive spin-2 particles. The large signals show up at the tree-level in both the curvature trispectrum and the tensor-curvature mixed bispectrum.
