关于希格斯带上限的正定性锥体约束的研究
On capped Higgs positivity cone
洪东宇 1王卓辉 1周双勇2
作者信息
- 1. 中国科学技术大学交叉学科理论中心,安徽合肥 230026
- 2. 中国科学技术大学交叉学科理论中心,安徽合肥 230026;彭恒武高能基础理论研究中心(合肥),安徽合肥 230026
- 折叠
摘要
标准模型有效场论的威尔逊系数受到一系列正定性约束的限制.已经证实,利用紫外分波幺正性的正定性部分可以将威尔逊系数限制在一个凸锥体中,而进一步包含非正定性部分则会从上方对此凸锥进行限制.对于希格斯散射,通过使用线性简化的幺正条件,且仅部分利用希格斯散射的内部对称性,已经得到了一个带有上限的正定性锥体.在本文中,我们进一步使用了更强的紫外非线性幺正条件.一般情况下这可能会产生更强的约束.但是对于希格斯这种情况,我们的结果表明非线性幺正条件本身并不增强相关约束,而更充分地利用内部对称性能够显著缩小带有上限的正定性椎体.
Abstract
The Wilson coefficients of the standard model effective field theory are subject to a series of positivity bounds.It has been shown that while the positivity part of the ultraviolet(UV)partial wave unitarity leads to the Wilson coeffi-cients living in a convex cone,further including the nonpositivity part caps the cone from above.For Higgs scattering,a capped positivity cone was obtained using a simplified,linear unitarity condition without utilizing the full internal sym-metries of Higgs scattering.Here,we further implement stronger nonlinear unitarity conditions from the UV,which gener-ically gives rise to better bounds.We show that,for the Higgs case in particular,while the nonlinear unitarity conditions per se do not enhance the bounds,the fuller use of the internal symmetries do shrink the capped positivity cone significantly.
关键词
正定性约束/标准模型有效场论/希格斯Key words
positivity bounds/standard model effective field theory(SMEFT)/Higgs引用本文复制引用
基金项目
Fundamental Research Funds for the Central Universities(WK2030000036)
National Natural Science Foundation of China(12075233)
出版年
2024
NETL
NSTL
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