Measurement of WZ and ZZ production in pp collisions at 8 TeV in final states with b-tagged jets with the CMS experiment

TL;DR

This paper reports the first observation of WZ and ZZ production in proton-proton collisions at 8 TeV with b-tagged jets, confirming Standard Model predictions with high significance.

Contribution

It presents the first measurement of VZ production in final states with b-tagged jets at 8 TeV, using CMS data and achieving a significance over six sigma.

Findings

First observation of VZ in this final state

Measured cross sections agree with NLO predictions

Significance exceeds six standard deviations

Abstract

In this note we present a measurement of the VZ (V=W,Z) production cross section in proton-proton collisions at $\sqrt{s}=$8 TeV in the VZ$\rightarrow$V$b\bar{b}$ decay mode with V$=$Z$\rightarrow (\nu\bar{\nu}$,$\ell\ell$), V$=$W$\rightarrow \ell{\nu}$, ($\ell=e,\mu$). The results are based on data corresponding to an integrated luminosity of 18.9 fb$^{-1}$ collected with the CMS experiment. The process is observed for the first time in this particular final state with a significance exceeding six standard deviations ($\sigma$). The measured cross sections are consistent with the predictions of NLO calculations.