Interference effects in Heavy Higgs production via gluon fusion in the Singlet Extension of the Standard Model

Abstract

The measurements of the properties of the Higgs boson still leave room for a non minimal scalar sector. Extensions of the Standard Model typically involve multiple neutral Higgs fields which can interfere among themselves. We show that these interference effects can be substantial taking as example the one Higgs Singlet Model, the simplest renormalizable addition to the SM.

Comments: Added MH=800 GeV, sin(alpha)=0.2 case; added cross section table; added some references. Conclusions unchanged