New limits on the mass of neutral Higgses in general models3

Abstract

In general electroweak models with weakly coupled (and otherwise arbitrary)\nHiggs sector there always exists in the spectrum a scalar state with mass\ncontrolled by the electroweak scale. A new and simple recipe to compute an\nanalytical tree-level upper bound on the mass of this light scalar is given. We\ncompare this new bound with similar ones existing in the literature and show\nhow to extract extra information on heavier neutral scalars in the spectrum\nfrom the interplay of independent bounds. Production of these states at future\ncolliders is addressed and the implications for the decoupling limit in which\nonly one Higgs is expected to remain light are discussed.\n