论文标题
柔软定理的树级振幅
Tree level amplitudes from soft theorems
论文作者
论文摘要
我们证明，软因素的树级幅度和明确的公式可以由软定理和软因素的普遍性来唯一确定。通过施加软定理和普遍性以及双复制的假设，我们在扩展的公式中重建单个跟踪Yang-Millsscalar振幅和纯Yang-Mills振幅。还确定了双聚体标量和Gluon的软因子的显式公式。阳米尔斯式量表和杨米尔斯幅度的膨胀可以扩展到爱因斯坦 - 杨米尔和重力振幅，我们使用扩展的单个痕量爱因斯坦 - 杨矿振幅来重现重力顿的软因子。
We demonstrate that the tree level amplitudes and the explicit formulas of soft factors can be uniquely determined by soft theorems and the universality of soft factors. By imposing the soft theorems and the universality, as well as the assumption of double copy, we reconstruct single trace Yang-Millsscalar amplitudes and pure Yang-Mills amplitudes, in the expanded formulas. The explicit formulas of soft factors for the bi-adjoint scalar and gluon are also determined. The expansions of Yang-Mills-scalar and Yang-Mills amplitudes can be extended to Einstein-Yang-Mills and gravitational amplitudes, and we use the expanded single trace Einstein-Yang-Mills amplitudes to reproduce the soft factors for the graviton.
