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arXiv 1702.06134hep-thastro-ph.COgr-qchep-ph
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标量理论的正界

Positivity Bounds for Scalar Theories

Claudia de Rham, Scott Melville, Andrew J. Tolley, Shuang-Yong Zhou

摘要:

假设存在一个本地的,解析的,酉UV完成的庞加莱不变的标量场理论与质量差距,我们推导出一个无限数量的正性要求使用的振幅和远离前向散射极限的已知属性。这些采取的形式上的极点减去散射振幅及其衍生物的组合的界限。反过来,这些积极的要求作为约束的运营商系数在低能量有效的理论。对于某些理论来说,这些约束可以用来给下一个最轻态的质量设定一个上限,如果这样的紫外线完成存在的话,这个上限必须超出低能有效理论。

英文摘要:

Assuming the existence of a local, analytic, unitary UV completion in a Poincaré invariant scalar field theory with a mass gap, we derive an infinite number of positivity requirements using the known properties of the amplitude at and away from the forward scattering limit. These take the form of bounds on combinations of the pole subtracted scattering amplitude and its derivatives. In turn, these positivity requirements act as constraints on the operator coefficients in the low energy effective theory. For certain theories these constraints can be used to place an upper bound on the mass of the next lightest state that must lie beyond the low energy effective theory if such a UV completion is to ever exist.

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