# Measurement of differential cross sections in the kinematic angular variable ϕ* for inclusive Z boson production in pp collisions at $\sqrt s$ = 8 TeV

## Abstract

Measurements of differential cross sections dσ/dϕ* and double-differential cross sections $d^2σ/dϕ*d|y|$ for inclusive Z boson production are presented using the dielectron and dimuon final states. The kinematic observable ϕ* correlates with the dilepton transverse momentum but has better resolution, and y is the dilepton rapidity. The analysis is based on data collected with the CMS experiment at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of $19.7 fb^{−1}$. The normalised cross section (1/σ) dσ/dϕ*, within the fiducial kinematic region, is measured with a precision of better than 0.5% for ϕ* < 1. The measurements are compared to theoretical predictions and they agree, typically, within few percent.

## Abstract

Measurements of differential cross sections dσ/dϕ* and double-differential cross sections $d^2σ/dϕ*d|y|$ for inclusive Z boson production are presented using the dielectron and dimuon final states. The kinematic observable ϕ* correlates with the dilepton transverse momentum but has better resolution, and y is the dilepton rapidity. The analysis is based on data collected with the CMS experiment at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of $19.7 fb^{−1}$. The normalised cross section (1/σ) dσ/dϕ*, within the fiducial kinematic region, is measured with a precision of better than 0.5% for ϕ* < 1. The measurements are compared to theoretical predictions and they agree, typically, within few percent.

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