A New 700GeV Scalar in the LHC Data?

Abstract

As an alternative to the metastability of the electroweak vacuum, resulting from perturbative calculations, one can consider a nonperturbative effective potential which, as at the beginning of the Standard Model, is restricted to the pure Φ4 sector yet consistent with the known analytical and numerical studies. In this approach, where the electroweak vacuum is now the lowest-energy state, besides the resonance of mass mh = 125 GeV defined by the quadratic shape of the potential at its minimum, the Higgs field should exhibit a second resonance with mass (MH)Theor = 690 (30) GeV associated with the zero-point energy determining the potential depth. In spite of its large mass, this resonance would couple to longitudinal Ws with the same typical strength as the low-mass state at 125 GeV and represent a relatively narrow resonance, mainly produced at LHC by gluon-gluon fusion. In this paper, we review LHC data suggesting a new resonance of mass (MH)EXP ∼ 682 (10) GeV, with a statistical significance that is far from negligible.

Keywords

• Higgs mass spectrum
• LHC experiments