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arXiv · 1105.0399

A Scalar Boson as a Messenger of New Physics

Ryosuke Sato·Satoshi Shirai·Tsutomu T. Yanagida
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Abstract

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 $\Lambda$. However, if $\Lambda$ 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 $\Lambda$. 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 $\Lambda$ is several TeV.

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Ryosuke Sato, Satoshi Shirai, Tsutomu T. Yanagida. 2011-05-02. A Scalar Boson as a Messenger of New Physics. https://doi.org/10.1016/j.physletb.2011.09.053

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