Indication for Double Parton Scatterings in W + Prompt J/Psi Production at the LHC

Abstract

We re-analyse the associated production of a prompt J/psi and a W boson in pp collisions at the LHC following the results of the ATLAS Collaboration. We perform the first study of the Single-Parton-Scattering (SPS) contributions at the Next-to-Leading Order (NLO) in alpha_s in the Colour-Evaporation Model (CEM), an approach based on the quark-hadron-duality. Our study provides clear indications for Double-Parton-Scattering (DPS) contributions, in particular at low transverse momenta, since our SPS CEM evaluation, which can be viewed as a conservative upper limit of the SPS yields, falls short compared to the ATLAS experimental data by 3.1 standard deviations. We also determine a finite allowed region for sigma_eff, inversely proportional to the size of the DPS yields, corresponding to the otherwise opposed hypotheses, namely our NLO CEM evaluation and the LO direct Colour-Singlet (CS) Model contribution. In both cases, the resulting DPS yields are significantly larger than that initially assumed by ATLAS based on jet-related analyses but is consistent with their observed raw-yield azimuthal distribution and with their prompt J/psi+J/psi and Z + prompt J/psi data.

LaTeX, 7 pages, 4 figures, 3 tables, uses elsarticle.cls. v2 matches the published version (slight rewordings, modified title and conclusions unchanged)

References in corpus (26)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Heavy quarkonium: progress, puzzles, and opportunities
• LHAPDF6: parton density access in the LHC precision era
• FEWZ 2.0: A code for hadronic Z production at next-to-next-to-leading order
• J/psi, psi' and Upsilon Production at Hadron Colliders: a review
• Hadroproduction of J/psi and Upsilon in association with a heavy-quark pair
• Quarkonium Production in an Improved Color Evaporation Model
• Measurement of the prompt $J/\psi$ pair production cross-section in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Measurement of prompt J/psi pair production in pp collisions at sqrt(s) = 7 TeV
• Observation and measurements of the production of prompt and non-prompt $J/\psi$ mesons in association with a $Z$ boson in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Next-to-Leading-Order QCD corrections to J/ψ(Υ)+γproduction at the LHC
• Pinning down the linearly-polarised gluons inside unpolarised protons using quarkonium-pair production at the LHC
• Inclusive double-quarkonium production at the Large Hadron Collider
• Hard probes in heavy ion collisions at the LHC: heavy flavour physics
• Real next-to-next-to-leading-order QCD corrections to J/psi and Upsilon hadroproduction in association with a photon
• Pair Production of Heavy Quarkonium and $B_c{(}^{\ast })$ Mesons at Hadron Colliders
• Complete Nonrelativistic-QCD Prediction for Prompt Double $J/\psi$ Hadroproduction
• Associated production of a quarkonium and a Z boson at one loop in a quark-hadron-duality approach
• QCD corrections to $J/\psi$ production in association with a $W$-boson at the LHC
• Production of $J/\psi +{\chi }_c$ and $J/\psi +J/\psi$ with real gluon emission at LHC
• Double parton scattering in pair-production of $J/\psi$ mesons at the LHC revisited
• Phenomenological analysis of associated production of $Z^0+b$ in the $b\to J/\psi X$ decay channel at the LHC
• Open charm production in Double Parton Scattering processes in the forward kinematics
• Associative production of ${\rm Y}$ and open charm at LHC
• Yields and polarizations of prompt $\jpsi$ and $\psits$ production in hadronic collisions
• Search for production of an Upsilon(1S) meson in association with a W or Z boson using the full 1.96 TeV proton anti-proton collision data set at CDF

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• Vector quarkonia at the LHC with JETHAD: A high-energy viewpoint
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• Observation of enhanced double parton scattering in proton-lead collisions at $\sqrt{s_{\mathrm{NN}}}=8.16$ TeV
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