高能Higgs EFTs的优缺点
Vices and Virtues of Higgs EFTs at Large Energy
摘要：
我们研究了在LHC的有效场论（EFT）的背景下，从希格斯生产新的物理约束，专注于希格斯搜索$HV$（$V=W,Z$）相关的生产，这是特别敏感的高能量行为的某些维度-6运营商。我们表明，这些搜索的分析一般占主导地位的运动学区域的通用EFT扩展故障，并建立在何种条件下，他们仍然可以是有意义的。例如，在费米子和希格斯粒子的特定组合是复合的且强耦合的情况下，可以建立这些搜索对效应随能量增长的算子的威尔逊系数的约束：那么，高能希格斯物理的边界与LEP 1互补，与LEP 2竞争。
英文摘要：
We study constraints on new physics from Higgs production at the LHC in the context of an effective field theory (EFT), focusing on Higgs searches in $HV$ ($V=W,Z$) associated production which are particularly sensitive to the high-energy behavior of certain dimension-6 operators. We show that analyses of these searches are generally dominated by a kinematic region where the generic EFT expansion breaks down, and establish under which conditions they can nevertheless be meaningful. For example, constraints from these searches on the Wilson coefficients of operators whose effects grow with energy can be established in scenarios where a particular combination of fermions and the Higgs are composite and strongly coupled: then, bounds from Higgs physics at high energy are complementary to LEP1 and competitive with LEP2.
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