Enhanced diphoton Higgs decay rate and isospin symmetric Higgs boson

Abstract

The ATLAS and CMS experiments have recently discovered a new 125 GeV scalar boson. We show that the properties of this scalar, including the enhancement of its diphoton decay rate, can be explained in a model with an isospin symmetric Higgs boson. The predictions of the model relevant for future experiments are also discussed.

Comments: 6 pages, 1 figure, ver.3: text extended to fit the PRD version