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Measurements of Higgs boson properties in hadronic final states at CMS

The most recent CMS Higgs boson (H) physics results, with the Higgs decaying to a bottom quark-antiquark pair ($\mathrm{b\bar{b}}$), 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 an...

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Detalles Bibliográficos
Autor principal: Giannini, Leonardo
Lenguaje:eng
Publicado: SISSA 2019
Materias:
Acceso en línea:https://dx.doi.org/10.22323/1.364.0342
http://cds.cern.ch/record/2797763
Descripción
Sumario:The most recent CMS Higgs boson (H) physics results, with the Higgs decaying to a bottom quark-antiquark pair ($\mathrm{b\bar{b}}$), 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 (VH), with $\mathrm{H}\to\mathrm{b\bar{b}}$, yields an observed significance of $3.3$ standard deviations ($\sigma$) above the backgroundonly 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 $\mathrm{VH(b\bar{b}})$ measurements using data collected $\sqrt{s} = 7$, 8 and 13 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 $\mathrm{H}\to\mathrm{b\bar{b}}$ in other production modes by the CMS experiment, including $\mathrm{t\bar{t}H}(\mathrm{b\bar{b}})$ with 2016 data, results in a significance of $5.6$ ($5.5$) $\sigma$, and $\mu = 1.04 \pm 0.20$.\\ The analysis targeting the $\mathrm{t\bar{t}H}(\mathrm{b\bar{b}})$ 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 $\mu = 1.15 \pm 0.30$.