95 GeV excesses in the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:msub> <mml:mi mathvariant="double-struck">Z</mml:mi> <mml:mn>3</mml:mn> </mml:msub> </mml:math> -symmetric next-to-minimal supersymmetric standard model
Jingwei Lian
Abstract
Recent analyses by CMS and ATLAS suggest a deviation in the diphoton channel at approximately 95 GeV, alongside a previously observed excess in <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"> <a:mi>b</a:mi> <a:mover accent="true"> <a:mi>b</a:mi> <a:mo stretchy="false">¯</a:mo> </a:mover> </a:math> signals at a similar mass by the Large Electron-Positron collider, potentially hinting at a new scalar particle. This study explores this possibility within the framework of the <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"> <e:msub> <e:mi mathvariant="double-struck">Z</e:mi> <e:mn>3</e:mn> </e:msub> </e:math> -symmetric next-to-minimal supersymmetric standard model. A comprehensive parameter scan was conducted, integrating constraints from dark matter relic density, direct detection experiments, and the properties of the observed 125 GeV Higgs boson. The results demonstrate that the model can accommodate the observed excesses with a singlet-dominated <h:math xmlns:h="http://www.w3.org/1998/Math/MathML" display="inline"> <h:mrow> <h:mi>C</h:mi> <h:mi>P</h:mi> </h:mrow> </h:math> -even scalar boson near 95 GeV. The model accurately predicts signal strengths of the diphoton and <j:math xmlns:j="http://www.w3.org/1998/Math/MathML" display="inline"> <j:mi>b</j:mi> <j:mover accent="true"> <j:mi>b</j:mi> <j:mo stretchy="false">¯</j:mo> </j:mover> </j:math> channels at a level of <n:math xmlns:n="http://www.w3.org/1998/Math/MathML" display="inline"> <n:mn>1</n:mn> <n:mi>σ</n:mi> </n:math> . Furthermore, it accounts for the measured dark matter relic abundance through bino-dominated neutralinos coannihilation with winolike electroweakinos, all while remaining consistent with existing Large Hadron Collider (LHC) constraints. These findings pave the way for future validation at the high-luminosity LHC and linear colliders, which may offer crucial tests of the model’s predictions. Published by the American Physical Society 2024