2 TeV Walking Technirho在LHC？
2 TeV Walking Technirho at LHC?
摘要：
ATLAS合作最近报告了在具有玻色子标记的脂肪双射的双玻色子通道中在约2 TeV处超过约2.5 $σ$的全局显著性，这可能意味着超出标准模型的新共振。我们提供了一个可能的解释过剩的同位旋三重态technicvector介子（technirhos，表示为$ρ_Π^{\pm,3}$）的步行人工色的情况下，一个家庭的模型作为基准。作为有效的理论，在有关的大型强子对撞机实验的尺度上的步行人工色，我们采取了一个规模不变的版本的隐藏的局部对称性模型，以适应technipion，technicvector介子，和technikion在这样一种方式，该模型尊重自发破缺的手征和规模对称性的基础步行人工色。特别是，technicalion，一个（伪）南武-戈德斯通玻色子的（近似）尺度对称性预测的步行人工色，已被证明是成功地确定与125 GeV的希格斯。目前可用的LHC限制，这些technihadrons被用来固定的耦合技术矢量介子的标准模型费米子和弱规范玻色子。我们发现，technirho的主要是通过Drell-Yan过程产生的，主要是衰变到dibosons，这占目前报道的过剩在2 TeV左右。与电弱精密测试和其他可能的发现渠道的2 TeV technirhos的一致性也被解决。
英文摘要：
The ATLAS collaboration has recently reported an excess of about 2.5 $σ$ global significance at around 2 TeV in the diboson channel with the boson-tagged fat dijets, which may imply a new resonance beyond the standard model. We provide a possible explanation of the excess as the isospin-triplet technivector mesons (technirhos, denoted as $ρ_Π^{\pm,3}$) of the walking technicolor in the case of the one-family model as a benchmark. As the effective theory for the walking technicolor at the scales relevant to the LHC experiment, we take a scale-invariant version of the hidden local symmetry model so constructed as to accommodate technipions, technivector mesons, and the technidilaton in such a way that the model respects spontaneously broken chiral and scale symmetries of the underlying walking technicolor. In particular, the technidilaton, a (pseudo) Nambu-Goldstone boson of the (approximate) scale symmetry predicted in the walking technicolor, has been shown to be successfully identified with the 125 GeV Higgs. Currently available LHC limits on those technihadrons are used to fix the couplings of technivector mesons to the standard-model fermions and weak gauge bosons. We find that the technirho's are mainly produced through the Drell-Yan process and predominantly decay to the dibosons, which accounts for the currently reported excess at around 2 TeV. The consistency with the electroweak precision test and other possible discovery channels of the 2 TeV technirhos are also addressed.
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