The Z+photon and diphoton decays of the Higgs boson as a joint probe of low energy SUSY models

2013/01/31 by Junjie Cao, Lei Wu, Pei Wu +2
Physics and Astronomy · #Boson #Dark Matter and Cosmic Phenomena #Energy (signal processing) #Higgs boson #High-Energy Particle Collisions Research #Large Hadron Collider #Minimal Supersymmetric Standard Model #Nuclear physics #Parameter space #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum mechanics #Statistics #Supersymmetry #hep-ex #hep-ph

paper · pdf · doi:10.1007/jhep09(2013)043

28 pages, 6 figures

arxiv created 2013/08/18 · openalex publication_date 2013/09/01 · arxiv updated 2015/06/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

In light of recent remarkable progress in Higgs search at the LHC, we study the rare decay process h → Zγ and show its correlation with the decay h → γγ in low energy SUSY models such as CMSSM, MSSM, NMSSM and nMSSM. Under various experimental constraints, we scan the parameter space of each model, and present in the allowed parameter space the SUSY predictions on the Zγ and γγ signal rates in the Higgs production at the LHC and future e+e- linear colliders. We have following observations: (i) Compared with the SM prediction, the Zγ and γγ signal rates in the CMSSM are both slightly suppressed; (ii) In the MSSM, both the Zγ and γγ rates can be either enhanced or suppressed, and in optimal case, the enhancement factors can reach 1.2 and 2 respectively; (iii) In the NMSSM, the Zγ and γγ signal rates normalized by their SM predictions are strongly correlated, and vary from 0.2 to 2; (iv) In the nMSSM, the Zγ and γγ rates are greatly reduced. Since the correlation behavior between the Zγsignal and the γγsignal is so model-dependent, it may be used to distinguish the models in future experiments.

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