Measurement of the Drell-Yan differential cross section at 7 TeV

TL;DR

This paper reports the measurement of the Drell-Yan differential cross section at 7 TeV using CMS data, comparing results with theoretical predictions across a broad mass range in dilepton channels.

Contribution

First measurement of the Drell-Yan differential cross section at 7 TeV normalized to the Z region, including effects of final state radiation.

Findings

Results agree with theoretical models

Normalized cross sections in full phase space and acceptance

Effect of final state radiation identified

Abstract

The Drell-Yan differential cross section is measured in pp collisions at sqrt(s) = 7 TeV, from a data sample collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 36 pb^{-1}. The cross section measurement, normalized to the measured cross section in the Z region, is reported for both the dimuon and dielectron channels in the dilepton invariant mass range 15-600 GeV. The normalized cross section values are quoted both in the full phase space and within the detector acceptance. The effect of final state radiation is also identified. The results are found to agree with theoretical predictions.