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arXiv 2610.07194hep-phhep-ex

VBF介导通道上HH产生的幺正性限制

Unitarity limits on HH production from VBF mediated channels

A. Dobado, D. Domenech, M. Herrero, R. A. Morales

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中文总结 AI 辅助

本研究通过VBF介导的$f_1 f_2 \ o f_3 f_4 H_5 H_6$散射,联合推导了SMEFT和HEFT中$VVHH$异常四次耦合的幺正性约束,并讨论了其在高能对撞机上的应用。

中文摘要 AI 辅助

在这项工作中,我们研究了矢量玻色子融合介导通道上双希格斯产生的幺正性约束,具体涉及$f_1 f_2 \ o f_3 f_4 H_5 H_6$散射,其中$f$泛指费米子或反费米子,并同时考虑夸克和轻子的情况。我们关注超出标准模型贡献,这些贡献来自两个电弱规范玻色子和两个希格斯玻色子($VVHH$,其中$VV=WW, ZZ$)的异常四次耦合,这些耦合由包含四个导数的有效算符产生。这四个导数算符出现在两种最流行的有效场论中,即SMEFT(在标准维度8)和HEFT(在手征维度4),并且它们对应的$VVHH$有效顶点可以很容易地与我们这里考虑的过程相关联。这项工作的目的是利用VBF介导通道在末态有四个粒子的特殊性,联合推导这些相关有效顶点的幺正性约束,同时保持内部$VV$对的传播为离壳,正如这些通道所要求的那样。我们还讨论了所获得的约束对高能对撞机上$f_1 f_2 \ o f_3 f_4 H_5 H_6$过程的相关性。

英文摘要

In this work we study the unitarity constraints on double Higgs production from Vector Boson Fusion mediated channels, specifically in $f_1 f_2 \to f_3 f_4 H_5 H_6$ scattering, where $f$ refers generically to either fermion or anti-fermion, and both cases with quarks and leptons will be considered. We focus on the beyond Standard Model contributions from anomalous quartic couplings of two electroweak gauge bosons and two Higgs bosons ($VVHH$ with $VV=WW, ZZ$) from effective operators containing four derivatives. These four derivative operators appear in the two most popular effective field theories, SMEFT (at canonical dimension 8) and HEFT (at chiral dimension 4), and their corresponding $VVHH$ effective vertices can be easily related for the considered processes here. The aim of this work is to derive jointly the unitarity constraints on these related effective vertices using the peculiarities of the VBF mediated channels with four particles in the final state while keeping the propagation of the internal $VV$ pairs being off-shell as it must be for these channels. We also discuss the relevance of the obtained constraints for $f_1 f_2 \to f_3 f_4 H_5 H_6$ at high energy colliders.

发表机构

  • Universidad Complutense de Madrid(马德里康普顿斯大学)
  • IFT-UAM/CSIC, Universidad Autónoma de Madrid(马德里自治大学理论物理研究所)
  • CONICET - Dpto. de Física, Universidad Nacional de La Plata(拉普拉塔国立大学物理系与阿根廷国家科学研究委员会)

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