Causal effective field theories

Causal effective field theories
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因果有效场论

DOI:
10.1103/physrevd.106.105018
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发表时间:
2022
期刊:
影响因子:
5
通讯作者:
A. Tolley
A. Tolley
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Mariana Carrillo González;Claudia de Rham;Victor Pozsgay;A. Tolley

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诸如幺正性、因果性和局部性等物理原理可以通过对威尔逊系数的允许值施加两侧界限来限制一致有效场论 (EFT) 的空间。在本文中,我们仅考虑低能因果关系的要求所产生的界限,而不诉诸任何有关紫外线物理学的假设。我们专注于平移对称理论,并考虑围绕均匀背景和球对称背景传播所产生的边界。我们发现低能量因果关系,即在 EFT 有效性范围内不存在可解析的时间提前的要求,产生了与先前使用全交叉对称性从 $2 \rightarrow 2$ 散射幅度色散关系获得的紧凑正性约束一致的两侧边界。
Physical principles such as unitarity, causality, and locality can constrain the space of consistent effective field theories (EFTs) by imposing two-sided bounds on the allowed values of Wilson coefficients. In this paper, we consider the bounds that arise from the requirement of low-energy causality alone, without appealing to any assumptions about UV physics. We focus on shift-symmetric theories, and consider bounds that arise from the propagation around both a homogeneous and a spherically-symmetric background. We find that low-energy causality, namely the requirement that there are no resolvable time advances within the regime of validity of the EFT, produces two-sided bounds in agreement with compact positivity constraints previously obtained from $2 \rightarrow 2$ scattering amplitude dispersion relations using full crossing symmetry.
DOI: 10.1103/physrevd.96.084007
发表时间: 2017
期刊: Physical Review D
影响因子: 5
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DOI: 10.1007/jhep05(2022)154
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影响因子: 5.4
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