Probing the low transverse momentum domain of Z production with novel variables

Abstract

The measurement of the low transverse momentum region of vector boson production in Drell-Yan processes has long been invaluable to testing our knowledge of QCD dynamics both beyond fixed-order in perturbation theory as well as in the non-perturbative region. Recently the DØ collaboration have introduced novel variables which lead to improved measurements compared to the case of the standard QT variable. To complement this improvement on the experimental side, we develop here a complete phenomenological study dedicated in particular to the new ϕ* variable. We compare our study, which contains the state-of-the-art next-to-next-to-leading resummation of large logarithms and a smooth matching to the full next-to-leading order result, to the experimental data and find excellent agreement over essentially the entire range of ϕ*, even without direct inclusion of non-perturbative effects. We comment on our findings and on the potential for future studies to constrain non-perturbative behaviour.

20 pages, 7 figures. Version accepted for publication in JHEP. A figure with comparison to RESBOS has been added

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Cited by in corpus (14)

• 50 Years of Quantum Chromodynamics
• Drell-Yan Production at NNLL'+NNLO Matched to Parton Showers
• Drell-Yan $q_T$ Resummation of Fiducial Power Corrections at N${}^3$LL
• Vector boson production at hadron colliders: transverse-momentum resummation and leptonic decay
• QCD resummation for hadronic final states
• Measurement of angular correlations in Drell-Yan lepton pairs to probe Z/gamma* boson transverse momentum at sqrt(s)=7 TeV with the ATLAS detector
• Predictions for Drell-Yan ϕ* and Q_T observables at the LHC
• Combining $Q_T$ and small-$x$ resummations
• Nonperturbative contributions to a resummed leptonic angular distribution in inclusive neutral vector boson production
• The $q_T$ and $\Delta \varphi$ spectra in W and Z production at the LHC at N${}^3$LL'+N${}^2$LO
• Drell-Yan lepton pair production at LHC and TMD quark densities of the proton
• Measurement of the ${\varphi }_{\eta }^{\ast }$ distribution of muon pairs with masses between 30 and 500 GeV in 10.4 fb${}^{-1}$ of $p\bar{p}$ collisions
• The $q_{\mathrm{T}}$ and $\Delta {\varphi }_{t\bar{t}}$ spectra in top-antitop hadroproduction at NNLL+NNLO: the interplay of soft-collinear resummation and Coulomb singularities
• Dihadron Angular Correlations in the $e^{+}{e}^{-}$ Collision