A Scalar Boson as a Messenger of New Physics

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.

13 pages, 6 figures; v2 minor corrections

References in corpus (5)

• Radion Phenomenology in Realistic Warped Space Models
• TASI Lectures on Extra Dimensions and Branes
• Measurement of WW Production and Search for the Higgs Boson in pp Collisions at sqrt(s) = 7 TeV
• Search for Randall-Sundrum Gravitons in the Diphoton Channel at CDF
• Search for the Higgs boson in the gamma gamma final state at the Tevatron

Cited by in corpus (5)

• Modified Higgs branching ratios versus CP and lepton flavor violation
• Singlet Neighbors of the Higgs Boson
• Electric Dipole Moments From Dark Sectors
• Sensitivity to light weakly-coupled new physics at the precision frontier
• Vortex solutions in the presence of Dark Portals