Angular coefficients of Z bosons produced in pp collisions at sqrt(s) = 8 TeV and decaying to mu+mu- as a function of transverse momentum and rapidity

TL;DR

This paper reports detailed measurements of angular coefficients for Z bosons in proton-proton collisions at 8 TeV, providing insights into production mechanisms and testing QCD predictions at various orders.

Contribution

It presents the first comprehensive measurement of five angular coefficients of Z bosons as functions of transverse momentum and rapidity at 8 TeV.

Findings

Measurements agree with QCD predictions at NLO and NNLO within uncertainties.

Provides detailed angular distributions for Z boson production.

Enhances understanding of electroweak and QCD interactions in high-energy collisions.

Abstract

Measurements of the five most significant angular coefficients, A[0] through A[4], for Z bosons produced in pp collisions at sqrt(s) = 8 TeV and decaying to mu+mu- are presented as a function of the transverse momentum and rapidity of Z boson. The integrated luminosity of the dataset collected with the CMS detector at the LHC corresponds to 19.7 inverse femtobarns. These measurements provide comprehensive information about Z boson production mechanisms, and are compared to QCD predictions at leading order, next-to-leading order, and next-to-next-to-leading order in perturbation theory.