Abstract
The WZ/ZZ (VZ) production channels with Z decaying to bottom quarks are one of the less reducible backgrounds for the standard model (SM) Higgs boson search in the same event topology (VH). The study of the VZ signal described here should be considered as a validation of the analysis strategy developed for the VH search in the boosted regime. The 8 TeV data sample including 19.0 fb−1 from the 2012 running period has been analyzed in the Z(μμ , ee , νν )Z and W(μν , eν )Z channels and the presence of the signal has been established with a significance of 7.5σ.
Highlights
The search for the Higgs boson (H) decaying into a bquark pair at the LHC is performed in events where H is produced in association with either a W or a Z boson (VH) decaying leptonically in order to suppress the multijet QCD background
This study is a validation of the VH(bb) analysis strategy developed by the CMS experiment, which reports a 2.1 excess [2], and represents the first attempt to measure the VZ cross section in the Z! bbfinal state at CMS
Control regions are identified in data and used to correct the Monte Carlo yields estimated for the main background processes: V+jets and ttproduction
Summary
The search for the Higgs boson (H) decaying into a bquark pair at the LHC is performed in events where H is produced in association with either a W or a Z boson (VH) decaying leptonically in order to suppress the multijet QCD background. The two channels can be separated only with very good dijet mass resolution. For these reasons, the diboson process represents a standard candle to validate the Higgs boson search strategy. This study is a validation of the VH(bb) analysis strategy developed by the CMS experiment, which reports a 2.1 excess [2], and represents the first attempt to measure the VZ cross section in the Z! This study is a validation of the VH(bb) analysis strategy developed by the CMS experiment, which reports a 2.1 excess [2], and represents the first attempt to measure the VZ cross section in the Z! bbfinal state at CMS
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