Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-12-17
Phys.Rev.D77:117701,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
5 pages, no figures; v2: normalisations settled, results unchanged, References added; v3: a new section 'Deviation from univer
Scientific paper
10.1103/PhysRevD.77.117701
We consider a minimal extension of the standard model where a real, gauge singlet scalar field is added to the standard spectrum. Introducing the Ansatz of universality of scalar couplings, we are led to a scenario which has a set of very distinctive and testable predictions: (i) the mixing between the standard model Higgs and the new state is near maximal, (ii) the ratio of the two Higgs mass eigenstates is fixed ($\sim \sqrt{3}$), (iii) the decay modes of each of the two eigenstates are standard model like. We also study how electroweak precision tests constrain this scenario. We predict the lighter Higgs to lie in the range of 114 and 145 GeV, and hence the heavier one between 198 and 250 GeV. The predictions of the model can be tested at the upcoming LHC.
Bhattacharyya Gautam
Branco Gustavo C.
Nandi Satyanarayan
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