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Evidence for the Higgs boson decay to a bottom quark-antiquark pair · Around

2017

Evidence for the Higgs boson decay to a bottom quark-antiquark pair

CMS Collaboration

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A search for the standard model (SM) Higgs boson ($\mathrm{H}$) decaying to $\mathrm{b}\overline{\mathrm{b}}$ when produced in association with an electroweak vector boson is reported for the following processes: $\mathrm{Z}(\nu\nu)\mathrm{H}$, $\mathrm{W}(\mu \nu)\mathrm{H}$, $\mathrm{W}(\mathrm{e} \nu)\mathrm{H}$, $\mathrm{Z}(\mu\mu)\mathrm{H}$, and $\mathrm{Z}(\mathrm{e}\mathrm{e})\mathrm{H}$.

The search is performed in data samples corresponding to an integrated luminosity of 35.9 fb$^{-1}$ at $\sqrt{s}=$ 13 TeV recorded by the CMS experiment at the LHC during Run 2 in 2016.
An excess of events is observed in data compared to the expectation in the absence of a $\mathrm{H} \to\mathrm{b}\overline{\mathrm{b}}$ signal.
The significance of this excess is 3.3 standard deviations, where the expectation from SM Higgs boson production is 2.8.

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