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arXiv 2001.10750hep-ph
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矢量暗物质的希格斯门和有效场论方法:再评价

The Higgs-portal for vector Dark Matter and the Effective Field Theory approach: a reappraisal

Giorgio Arcadi, Abdelhak Djouadi, Marumi Kado

摘要:

我们重新分析了有效场论方法的情况下,粒子的暗物质(DM)在宇宙中的矢量状态,相互作用只或主要通过标准模型,如希格斯玻色子玻色子在大型强子对撞机上观察到。这种与模型无关的简单方法,具有最小的一组新的输入参数,被广泛用作DM搜索和天体粒子和对撞机物理研究的基准。我们表明,这种有效的理论可能是紫外线完全模型的极限情况下,作为一个例子,一个基于自发破缺的U(1)规范对称性,其中包括一个暗规范玻色子和一个额外的标量与标准的希格斯玻色子混合。因此,尽管存在新的自由度,希格斯玻色子的不可见衰变分支比的测量,如在对撞机,如欧洲核子研究中心的大型强子对撞机,可以在这样一个有效的框架一致地解释,并可以在直接检测实验中的DM搜索结果的补充。

英文摘要:

We reanalyze the effective field theory approach for the scenario in which the particles that account for the dark matter (DM) in the universe are vector states that interact only or mainly through the Standard Model-like Higgs boson observed at the LHC. This model-independent and simple approach, with a minimal set of new input parameters, is widely used as a benchmark in DM searches and studies in astroparticle and collider physics. We show that this effective theory could be the limiting case of ultraviolet complete models, taking as an example the one based on a spontaneously broken U(1) gauge symmetry that incorporates a dark gauge boson and an additional scalar that mixes with the standard Higgs boson. Hence, despite the presence of the new degrees of freedom, measurements of the invisible decay branching ratio of the Higgs boson, as performed at colliders such as the CERN LHC, can be interpreted consistently in such an effective framework and can be made complementary to results of DM searches in direct detection experiments.

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