95 GeV excess in the Georgi-Machacek model: Single or twin peak resonance
Amine Ahriche
Abstract
In this work, we investigate the possibility to address the excess observed around 95 GeV in the <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>γ</a:mi><a:mi>γ</a:mi></a:math>, <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mi>τ</c:mi><c:mi>τ</c:mi></c:math>, and <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"><e:mi>b</e:mi><e:mover accent="true"><e:mi>b</e:mi><e:mo stretchy="false">¯</e:mo></e:mover></e:math> channels as a scalar resonance(s) within the Georgi-Machacek model. In our analysis, we find that the excess can be easily accommodated in the channels (<i:math xmlns:i="http://www.w3.org/1998/Math/MathML" display="inline"><i:mi>γ</i:mi><i:mi>γ</i:mi></i:math> and <k:math xmlns:k="http://www.w3.org/1998/Math/MathML" display="inline"><k:mi>b</k:mi><k:mover accent="true"><k:mi>b</k:mi><k:mo stretchy="false">¯</k:mo></k:mover></k:math>) simultaneously, where the 95 GeV candidate is a single peak resonance (SPR) due to a light <o:math xmlns:o="http://www.w3.org/1998/Math/MathML" display="inline"><o:mi>C</o:mi><o:mi>P</o:mi></o:math>-even scalar. We found that the excess in the <q:math xmlns:q="http://www.w3.org/1998/Math/MathML" display="inline"><q:mi>τ</q:mi><q:mi>τ</q:mi></q:math> channel can be addressed simultaneously with <s:math xmlns:s="http://www.w3.org/1998/Math/MathML" display="inline"><s:mi>γ</s:mi><s:mi>γ</s:mi></s:math> and <u:math xmlns:u="http://www.w3.org/1998/Math/MathML" display="inline"><u:mi>b</u:mi><u:mover accent="true"><u:mi>b</u:mi><u:mo stretchy="false">¯</u:mo></u:mover></u:math> only if the 95 GeV candidate is a twin peak resonance (TPR), i.e., another <y:math xmlns:y="http://www.w3.org/1998/Math/MathML" display="inline"><y:mi>C</y:mi><y:mi>P</y:mi></y:math>-odd scalar in addition to the <ab:math xmlns:ab="http://www.w3.org/1998/Math/MathML" display="inline"><ab:mi>C</ab:mi><ab:mi>P</ab:mi></ab:math>-even scalar. We demonstrate that the nature of the 95 GeV scalar resonance candidate (SPR or TPR) can be probed via the properties of its di-<cb:math xmlns:cb="http://www.w3.org/1998/Math/MathML" display="inline"><cb:mi>τ</cb:mi></cb:math> decay. Published by the American Physical Society 2024