arXiv 1606.038042016-06hep-phhep-ex

$SU(2)_1 \times SU(2)_2 \times U(1)_Y$模型在LHC上的唯象

Phenomenology of an $SU(2)_1 \times SU(2)_2 \times U(1)_Y$ model at the LHC

Chuan-Hung Chen, Takaaki Nomura

备注：: 22 pages, 5 figures, 3 tables, version accepted by Phys. Rev. D
发表信息：: Phys. Rev. D 95, 015015 (2017)
DOI：: 10.1103/PhysRevD.95.015015

摘要：

我们研究了LHC中标准模型的最小$SU(2)$规范对称性扩展的意义。为了实现自发对称性破缺，在$SU(2)$中引入了重Higgs二重态.为了得到一个无反常模型和新的带电规范玻色子的衰变，我们引入了一个矢量夸克偶。我们还采用了一个真正的标量玻色子来决定通过胶子-胶子融合过程的重希格斯生产。结果表明，新规范耦合和新规范玻色子的质量可以被LHC的电弱$ρ$参数和双轻子共振实验严格约束。结果表明，由于新的荷电规范玻色子增强，当Yukawa耦合值取适当值时，ATLAS和CMS测量的重标量玻色子到双光子通道的截面可以很容易地满足.此外，通过事例模拟，我们发现当亮度大于60 fb $^{-1}$时，由重Higgs衰变产生的双光子的$pp\to (γγ)_H+{\rm jet}$的意义可以超过$4σ$.

英文摘要：

We investigate the implications of a minimal $SU(2)$ gauge symmetry extension of the standard model at the LHC. To achieve the spontaneous symmetry breaking, a heavy Higgs doublet of the $SU(2)$ is introduced. To obtain an anomaly free model and the decays of new charged gauge bosons, we include a vector-like quark doublet. We also employ a real scalar boson to dictate the heavy Higgs production via the gluon-gluon fusion processes. It is found that the new gauge coupling and the masses of new gauge bosons can be strictly bounded by the electroweak $ρ$-parameter and dilepton resonance experiments at the LHC. It is found that due to the new charged gauge boson enhancement, the cross sections for a heavy scalar boson to diphoton channel measured by ATLAS and CMS can be easily satisfied when the values of Yukawa couplings are properly taken. Furthermore, by adopting event simulation, we find that the significance of $pp\to (γγ)_H+{\rm jet}$, where the diphoton is from the heavy Higgs decay, can be over $4σ$ when the luminosity is above 60 fb$^{-1}$.

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摘要：

英文摘要：

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