%0 Journal Article
%T Higgs Decay in the Two Higgs Doublet Model: Large quantum effects in the decoupling regime
%+ Laboratoire de Physique Mathématique et Théorique (PMT)
%A Capdequi-Peyranere, Michel
%A Arhrib, A.
%A Hollik, W.
%A Penaranda, S.
%Z LaTeX, 13 pages, 5 figures. Improved text, added references, appendix removed. Version to appear in PLB
%< avec comité de lecture
%Z 03-021
%@ 0370-2693
%J Physics Letters B
%I Elsevier
%V 579
%N 3
%P 361-370
%8 2004-01-22
%D 2004
%Z hep-ph/0307391
%R 10.1016/j.physletb.2003.10.006
%K CP invariance
%K Decoupling
%K Unitarity
%K Doublet state
%K Quantum size effect
%K Higgs bosons
%K Quantum effect
%K Standard model
%Z PACS: 14.80.Cp; 14.80.Bn; 13.90.+i; 12.60.Fr
%Z Physics [physics]/High Energy Physics - Phenomenology [hep-ph]Journal articles
%X We study the Higgs-boson decays h0 -> b \bar{b}, h0 -> \gamma \gamma and h0 -> \gamma Z within the framework of the Two Higgs Doublet Model (THDM) in the context of the decoupling regime, together with tree level unitarity constraints. We show that when the light CP-even Higgs boson of the THDM mimics the Standard-Model Higgs boson, not only the one-loop effects to h0 -> {\gamma \gamma ,\gamma Z} but also the one-loop contribution to h0 -> b \bar{b} can be used to distinguish between THDM and SM. The size of the quantum effects in h0 -> b \bar{b} are of the same order as in h0 -> {\gamma \gamma ,\gamma Z} and can reach 25% in both cases.
%G English
%L hal-00335193
%U https://hal.science/hal-00335193
%~ CNRS
%~ UNIV-MONTP2
%~ UNIV-MONTPELLIER
%~ UM1-UM2