Eur. Phys. J. C (2016) 76: 1
https://doi.org/10.1140/epjc/s10052-015-3826-6

Regular Article - Theoretical Physics

Extending the Higgs sector: an extra singlet

¹ Institute for Theoretical and Experimental Physics, Moscow, 117218, Russia
² Novosibirsk State University, Novosibirsk, 630090, Russia
³ The Center for Particle Physics of Marseilles, 13288, Marseille, France
⁴ Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region, 141700, Russia
⁵ Moscow Engineering Physics Institute, Moscow, 115409, Russia

^* e-mail: zhemchugov@itep.ru

Received: 15 September 2015
Accepted: 27 November 2015
Published online: 2 January 2016

Abstract

An extension of the Standard Model with an additional Higgs singlet is analyzed. Bounds on singlet admixture for the 125 GeV h boson from electroweak radiative corrections and data on h production and decays are obtained. The possibility of double h production enhancement at 14 TeV LHC due to a heavy Higgs contribution is considered.