Abstract
Following the discovery of the Higgs boson with a mass of approximately 125 GeV at the LHC, many studies have been performed from both the theoretical and experimental viewpoints to search for a new Higgs Boson that is lighter than 125 GeV. We explore the possibility of constraining a lighter neutral scalar Higgs boson h1 and a lighter pseudo-scalar Higgs boson a1 in the Next-to-Minimal Supersymmetric Standard Model by restricting the next-to-lightest scalar Higgs boson h2 to be the one observed at the LHC after applying the phenomenological constraints and those from experimental measurements. Such lighter particles are not yet completely excluded by the latest results of the search for a lighter Higgs boson in the diphoton decay channel from LHC data. Our results show that some new constraints on the Next-to-Minimal Supersymmetric Standard Model could be obtained for a lighter scalar Higgs boson at the LHC if such a search is performed by experimental collaborations and more data. The potentials of discovery for other interesting decay channels of such a lighter neutral scalar or pseudo-scalar particle are also discussed.
Highlights
The Standard Model (SM) of particle physics has been highly successful in explaining high-energy experimental results
We explore the possibility of constraining a lighter neutral scalar Higgs boson h1 and a lighter pseudo-scalar Higgs boson a1 in the Next-to-Minimal Supersymmetric Standard Model (NMSSM) by restricting the next-to-lightest scalar Higgs boson h2 to be the observed 125 GeV state, by comparing the lighter particles in the NMSSM w√ith the latest CMS results with the full 2016 data set at s = 13 TeV, after the constraints from the experimental measurements and other sources have been imposed
We will explore the possibility that the signal may be given by the lightest scalar Higgs boson h1 in the NMSSM
Summary
The Standard Model (SM) of particle physics has been highly successful in explaining high-energy experimental results. The simplest solution is the so-called Next-to-Minimal Supersymmetric Standard Model (NMSSM), which introduces a new gauge singlet superfield that only couples to the Higgs sector in a similar manner to the Yukawa coupling, and can generate a μ parameter dynamically of the order of the SUSY breaking scale, solving the “μ problem” and the little hierarchy problem without requiring much fine-tuning [16–23]. This new singlet adds additional degrees of freedom to the NMSSM particle spectrum.
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