# Measurements of the associated production of a $Z$ boson and b jets in $pp$ collisions at $\sqrt{s}$ = 8TeV

CMS Collaboration; Canelli, Florencia; Kilminster, Benjamin; Aarestad, Thea; Caminada, Lea; de Cosa, Annapaoloa; Del Burgo, Riccardo; Donato, Silvio; Galloni, Camilla; Hinzmann, Andreas; Hreus, Tomas; Ngadiuba, Jennifer; Pinna, Deborah; Rauco, Giorgia; Robmann, Peter; Salerno, Daniel; Schweiger, Korbinian; Seitz, Claudia; Takahashi, Yuta; Zucchetta, Alberto; et al (2017). Measurements of the associated production of a $Z$ boson and b jets in $pp$ collisions at $\sqrt{s}$ = 8TeV. European Physical Journal C - Particles and Fields, C77(11):751.

## Abstract

Measurements of the associated production of a $Z$ boson with at least one jet originating from a b quark in proton–proton collisions at $\sqrt{s}$ = 8TeV are presented. Differential cross sections are measured with data collected by the CMS experiment corresponding to an integrated luminosity of 19.8fb$^{−1}$. $Z$ bosons are reconstructed through their decays to electrons and muons. Cross sections are measured as a function of observables characterizing the kinematics of the b jet and the $Z$ boson. Ratios of differential cross sections for the associated production with at least one b jet to the associated production with any jet are also presented. The production of a $Z$ boson with at least two b jets is investigated, and differential cross sections are measured for the dijet system. Results are compared to theoretical predictions, testing two different flavour schemes for the choice of initial-state partons.

## Abstract

Measurements of the associated production of a $Z$ boson with at least one jet originating from a b quark in proton–proton collisions at $\sqrt{s}$ = 8TeV are presented. Differential cross sections are measured with data collected by the CMS experiment corresponding to an integrated luminosity of 19.8fb$^{−1}$. $Z$ bosons are reconstructed through their decays to electrons and muons. Cross sections are measured as a function of observables characterizing the kinematics of the b jet and the $Z$ boson. Ratios of differential cross sections for the associated production with at least one b jet to the associated production with any jet are also presented. The production of a $Z$ boson with at least two b jets is investigated, and differential cross sections are measured for the dijet system. Results are compared to theoretical predictions, testing two different flavour schemes for the choice of initial-state partons.

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