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Creators/Authors contains: "I.J., Watson"

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  1. 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$$m_{\ell \ell }$$ m , transverse momentum$$p_{\textrm{T}} (\ell \ell )$$ p T ( ) , and$$\varphi ^{*}_{\eta }$$ φ η . The$$\varphi ^{*}_{\eta }$$ φ η observable, derived from angular measurements of the leptons and highly correlated with$$p_{\textrm{T}} (\ell \ell )$$ p T ( ) , is used to probe the low-$$p_{\textrm{T}} (\ell \ell )$$ p T ( ) region in a complementary way. Dilepton masses up to 1$$\,\text {Te\hspace{-.08em}V}$$ Te 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$$m_{\ell \ell }$$ m ranges to those in the Z mass peak interval are presented. The collected data correspond to an integrated luminosity of 36.3$$\,\text {fb}^{-1}$$ fb - 1 of proton–proton collisions recorded with the CMS detector at the LHC at a centre-of-mass energy of 13$$\,\text {Te\hspace{-.08em}V}$$ Te V . Measurements are compared with predictions based on perturbative quantum chromodynamics, including soft-gluon resummation. 
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