Speakers
Description
The double differential cross sections of the Drell-Yan lepton pair ($l^+l^-$, dielectron or dimuon) production, as functions the invariant mass $m_{ll}$, transverse momentum $pT$, and $\phi^*$, are measured. The $\phi^*$ observable is highly correlated with $pT$ and is used to probe the low-$pT$ region in a complementary way. Dilepton masses up to 1 TeV are investigated. Additionally, a measurement is performed requiring at least one jet in the final state. To benefit from partial cancellation of the systematic uncertainty, the ratios of the differential cross sections in $pT$ and $\varphi^*$ for different $m_{ll}$ ranges over the ones in the \PZ mass peak interval are presented. The collected data correspond to an integrated luminosity of $36.3 fb^{-1}$ of proton--proton collisions recorded with the CMS detector at the LHC at a center-of-mass energy of 13 TeV in 2016. Measurements are compared to state-of-the-art predictions based on perturbative quantum chromodynamics, including soft-gluon resummation.
