Measurement of the mass dependence of the transverse momentum of lepton pairs in Drell-Yan production in proton-proton collisions at $\sqrt{s}$ = 13 TeV

Abstract

The double differential cross sections of the Drell-Yan lepton pair (${\ell }^{+}{\ell }^{-}$, dielectron or dimuon) production are measured as functions of the invariant mass $m_{\ell \ell }$, transverse momentum $p_{\mathrm{T}}(\ell \ell )$, and ${\varphi }_{\eta }^{\ast }$. The ${\varphi }_{\eta }^{\ast }$ observable, derived from angular measurements of the leptons and highly correlated with $p_{\mathrm{T}}(\ell \ell )$, is used to probe the low-$p_{\mathrm{T}}(\ell \ell )$ 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 for various $m_{\ell \ell }$ ranges to those in the Z 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 centre-of-mass energy of 13 TeV. Measurements are compared with predictions based on perturbative quantum chromodynamics, including soft-gluon resummation.

arXiv commentReplaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/SMP-20-003 (CMS Public Pages)

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