Precision Higgs couplings in neutral naturalness models: an effective field theory approach

Precision Higgs couplings in neutral naturalness models: an effective field theory approach
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中性自然模型中的精密希格斯耦合:一种有效的场论方法

DOI:
10.1007/jhep02(2021)234
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发表时间:
2020-07
影响因子:
5.4
通讯作者:
Jiang-Hao Yu
Jiang-Hao Yu
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Lucien Heurtier;Hao-Lin Li;Huayang Song;Shufang Su;Wei Su;Jiang-Hao Yu

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中性自然模型中的希格斯扇区提供了一个通往隐藏扇区的门户,因此在当前和未来的对撞机上测量希格斯耦合在约束模型的参数空间中起着核心作用。我们研究一类中性自然性模型,其中希格斯玻色子是来自普适SO(N)/SO(N-1)陪集结构的伪戈德斯通玻色子。从自发全局对称破缺中积分出径向模,得到标准模型有效场论中的各种六维算符,并计算了包含辐射修正的低能Higgs有效势.我们在当前和未来的对撞机上对希格斯耦合精确测量进行了χ 2拟合,并表明在未来的希格斯工厂中,新的物理尺度可以在没有希格斯不可见衰变通道的情况下探索到2.3(2.4)TeV。的限制是通过电弱精密测量获得的间接约束。
The Higgs sector in neutral naturalness models provides a portal to the hidden sectors, and thus measurements of Higgs couplings at current and future colliders play a central role in constraining the parameter space of the model. We investigate a class of neutral naturalness models, in which the Higgs boson is a pseudo-Goldstone boson from the universal SO (N)/SO (N− 1) coset structure. Integrating out the radial mode from the spontaneous global symmetry breaking, we obtain various dimension-six operators in the Standard Model effective field theory, and calculate the low energy Higgs effective potential with radiative corrections included. We perform a χ 2 fit to the Higgs coupling precision measurements at current and future colliders and show that the new physics scale could be explored up to 2.3 (2.4) TeV without (with) the Higgs invisible decay channels at future Higgs factories. The limits are comparable to the indirect constraints obtained via electroweak precision measurements.
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