Bounds on amplitudes in effective theories with massive spinning particles
Bounds on amplitudes in effective theories with massive spinning particles
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具有大量旋转粒子的有效理论中的振幅界限
DOI：
10.1103/physrevd.98.045003
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发表时间：
2018
影响因子：
5
通讯作者：
Kurt Hinterbichler
中科院分区：
文献类型：
--
作者：
James Bonifacio;Kurt Hinterbichler
我们考虑一个程序，直接构建一般的树级四粒子散射振幅的大质量自旋粒子的洛伦兹不变性，酉性，交叉对称性和本地化的通常要求是一致的。这样的振幅有无穷多个，但是我们可以通过将树振幅的高能量增长限制在有效场论内来隔离有趣的理论。这使我们能够设置模型无关的下限增长的树级振幅在任何有效场理论与给定的粒子含量和任何相互作用项与任意但有限数量的衍生物。在某些常见情况下，这对应于找到最高可能的强耦合尺度。当应用于自旋2时，我们表明饱和该束缚的唯一振幅是由大质量自旋2粒子的已知无幽灵理论（即dRGT大质量引力和伪线性理论）产生的。我们还提出了一个猜想，在一个理论与一个单一的大质量粒子的任何整数自旋树振幅的允许增长。
We consider a procedure for directly constructing general tree-level four-particle scattering amplitudes of massive spinning particles that are consistent with the usual requirements of Lorentz invariance, unitarity, crossing symmetry, and locality. There are infinitely many such amplitudes, but we can isolate interesting theories by bounding the high-energy growth of the tree amplitudes within the effective field theory. This allows us to set model-independent lower bounds on the growth of tree-level amplitudes in any effective field theory with a given particle content and any interaction terms with an arbitrary but finite number of derivatives. In certain common cases this corresponds to finding the highest possible strong coupling scale. When applied to spin 2, we show that the only amplitudes that saturate this bound are generated by the known ghost-free theories of a massive spin-2 particle, namely dRGT massive gravity and the pseudo-linear theory. We also make a conjecture for the allowed growth of tree amplitudes in a theory with a single massive particle of any integer spin.
影响因子：
5.4
作者：
B. Henning;Xiaochuan Lu;Tom Melia;H. Murayama
通讯作者：
B. Henning;Xiaochuan Lu;Tom Melia;H. Murayama
3d 应力张量引导程序
影响因子：
5.4
作者：
Dymarsky, Anatoly;Kos, Filip;Kravchuk, Petr;Poland, David;Simmons-Duffin, David
通讯作者：
Simmons-Duffin, David