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

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 ${\varphi^{*}_{\eta}}$. The ${\varphi^{*}_{\eta}}$ 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.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 $p_{\textrm{T}} (\ell \ell )$, and $\varphi ^{*}_{\eta }$. The $\varphi ^{*}_{\eta }$ observable, derived from angular measurements of the leptons and highly correlated with $p_{\textrm{T}} (\ell \ell )$, is used to probe the low-$p_{\textrm{T}} (\ell \ell )$ region in a complementary way. Dilepton masses up to 1$\,\text {Te\hspace{-.08em}V}$ 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$\,\text {fb}^{-1}$ of proton–proton collisions recorded with the CMS detector at the LHC at a centre-of-mass energy of 13$\,\text {Te\hspace{-.08em}V}$. Measurements are compared with predictions based on perturbative quantum chromodynamics, including soft-gluon resummation.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 $\phi^*_\eta$. The $\phi^*_\eta$ 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