Volume 364 - European Physical Society Conference on High Energy Physics (EPS-HEP2019) - Higgs Physics
Measurements of Higgs boson properties in hadronic final states at CMS
L. Giannini* on behalf of the CMS collaboration
*corresponding author
Full text: pdf
Pre-published on: June 18, 2020
Published on:
Abstract
The most recent CMS Higgs boson (H) physics results, with the Higgs decaying to a bottom quark-antiquark pair ($\mathrm{b\overline{b}}$), are presented. The focus is on the analysis of data collected at $\sqrt{s}=13$ $\mathrm{TeV}$ in 2017, corresponding approximately to 41 $\mathrm{fb}^{-1}$.
The analysis targeting the associated production of a Higgs boson and a vector boson ($\mathrm{VH}$), with $\mathrm{H\rightarrow b\overline{b}}$, yields an observed significance of 3.3 standard deviations ($\sigma$) above the background-only hypothesis, with an expected significance of 3.1$\sigma$. The corresponding measured signal strength is $\mu$ = 1.08 $\pm$ 0.34. When combined with previous $\mathrm{VH(b\overline{b})}$ measurements using data collected at $\sqrt{s}=$ 7, 8 and 13 $\mathrm{TeV}$, the observed (expected) significance is 4.8 (4.9) $\sigma$, corresponding to $\mu$ = 1.01 $\pm$ 0.22. Finally, the combination of this result with searches for $\mathrm{H\rightarrow b\overline{b}}$ in other production modes by the CMS experiment, including $\mathrm{t\overline{t}H(b\overline{b})}$ with 2016 data, results in a significance of 5.6 (5.5) $\sigma$, and $\mu=$ 1.04 $\pm$ 0.20.
The analysis targeting the $\mathrm{t\overline{t}H(b\overline{b})}$ process using 2017 data is also covered. The significance for this production mode is of 3.7 (2.6) $\sigma$ , corresponding to $\mu$ = 1.49$\pm$0.42. In combination with the previous result using 2016 data, a significance of 3.9 (3.5) $\sigma$ is obtained, with $\mu$ = 1.15$\pm$0.30.
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