Higgs boson precision analysis of the full LHC run 1 and run 2 data
Yongtae Heo, Dong‐Won Jung, Jae Sik Lee
Abstract
We perform global fits of the Higgs boson couplings to the full Higgs datasets collected at the LHC with the integrated luminosities per experiment of approximately <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>5</a:mn><a:mo>/</a:mo><a:mi>fb</a:mi></a:mrow></a:math> at 7 TeV, <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mrow><c:mn>20</c:mn><c:mo>/</c:mo><c:mi>fb</c:mi></c:mrow></c:math> at 8 TeV, and up to <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"><e:mrow><e:mn>139</e:mn><e:mo>/</e:mo><e:mi>fb</e:mi></e:mrow></e:math> at 13 TeV. Our combined analysis based on the experimental signal strengths used in this work and the theoretical ones elaborated for our analysis reliably reproduce the results in the literature. We reveal that the LHC Higgs precision data are no longer best described by the Standard Model (SM) Higgs boson taking account of extensive and comprehensive <g:math xmlns:g="http://www.w3.org/1998/Math/MathML" display="inline"><g:mi>C</g:mi><g:mi>P</g:mi></g:math>-conserving and <i:math xmlns:i="http://www.w3.org/1998/Math/MathML" display="inline"><i:mi>C</i:mi><i:mi>P</i:mi></i:math>-violating scenarios found in several well-motivated models beyond the SM. Especially, in most of the fits considered in this work, we observe that the best-fitted values of the normalized Yukawa couplings are about <k:math xmlns:k="http://www.w3.org/1998/Math/MathML" display="inline"><k:mn>2</k:mn><k:mi>σ</k:mi></k:math> below the corresponding SM ones with the <m:math xmlns:m="http://www.w3.org/1998/Math/MathML" display="inline"><m:mn>1</m:mn><m:mi>σ</m:mi></m:math> errors of 3%–5%. On the other hand, the gauge-Higgs couplings are consistent with the SM with the <o:math xmlns:o="http://www.w3.org/1998/Math/MathML" display="inline"><o:mn>1</o:mn><o:mi>σ</o:mi></o:math> errors of 2%–3%. Incidentally, the reduced Yukawa couplings help to explain the excess of the <q:math xmlns:q="http://www.w3.org/1998/Math/MathML" display="inline"><q:mi>H</q:mi><q:mo stretchy="false">→</q:mo><q:mi>Z</q:mi><q:mi>γ</q:mi></q:math> signal strength of <t:math xmlns:t="http://www.w3.org/1998/Math/MathML" display="inline"><t:mn>2.2</t:mn><t:mo>±</t:mo><t:mn>0.7</t:mn></t:math> recently reported by the ATLAS and CMS collaborations. Published by the American Physical Society 2024