Measurements of the associated production of a Z boson and b jets in pp collisions at [Formula: see text]

在[公式:见正文]处测量pp碰撞中Z玻色子和b喷注的关联产生

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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 [Formula: see text] are presented. Differential cross sections are measured with data collected by the CMS experiment corresponding to an integrated luminosity of 19.8 fb-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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