LEP Indications for Two Light Higgs Bosons and U(1)' Model

Details LEP Indications for Two Light Higgs Bosons and U(1)' Model LEP Indications for Two Light Higgs Bosons and U(1)' Model

2005-12-11

arxiv.org/abs/hep-ph/0512134v1

Phys.Rev.D73:016001,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pp, 7 figs, 2 tables

Scientific paper

10.1103/PhysRevD.73.016001

Reanalyses of LEP data have shown preference to two light CP-even Higgs bosons. We discuss implications of such a Higgs boson spectrum for the minimal supersymmetric model extended by a Standard Model singlet chiral superfield and an additional Abelian gauge invariance (the U(1)' model). We, in particular, determine parameter regions that lead to two light CP-even Higgs bosons while satisfying existing bounds on the mass and mixings of the extra vector boson. In these parameter regions, the pseudoscalar Higgs is found to be nearly degenerate in mass with either the lightest or next-to-lightest Higgs boson. Certain parameters of the U(1)' model such as the effective mu parameter are found to be significantly bounded by the LEP two-light-Higgs signal.

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