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arXiv 1105.0399hep-ph
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新物理学的信使--标量玻色子

A Scalar Boson as a Messenger of New Physics

Ryosuke Sato, Satoshi Shirai, Tsutomu T. Yanagida

摘要:

在标准模型中,量子修正产生了希格斯玻色子的二次发散质量项。因此,如果希格斯玻色子的质量为100 GeV,这意味着理论在TeV尺度附近存在一个截止点,一些与新物理学相关的粒子可能会出现在截止尺度$Λ$附近。然而,如果$Λ$是几个TeV,在LHC上可能很难找到这样的粒子。在本文中,我们考虑的情况下,新的物理提供相对轻的粒子相比,规模$Λ$。在这种情况下,我们证明了由Higgs和/或新粒子衰变产生的双光子事件和四轻子事件具有自然的大截面,即使$Λ$是几TeV,LHC也可以在相当宽的参数范围内检验新物理。

英文摘要:

Quantum corrections generate a quadratically divergent mass term for the Higgs boson in the Standard Model. Thus, if the Higgs boson has a mass of order 100 GeV, it implies the presence of a cut-off of the theory around TeV scale, and some particles associated with the new physics may appear around the cut-off scale $Λ$. However, if $Λ$ is several TeV, it may be difficult to find such particles at the LHC. In this paper, we consider a situation in which the new physics provides relatively light particles compared with the scale $Λ$. In such a situation, we show that diphoton event and four lepton event by the decay of the Higgs and/or a new particle have naturally large cross section, and LHC may test the new physics in a considerably broad parameter region even if $Λ$ is several TeV.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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