Constraints on Nonrelativistic-QCD Long-Distance Matrix Elements from $J/\psi$ Plus $W$/$Z$ Production at the LHC

Abstract

We study the associated production of prompt $J/\psi$ mesons and $W$ or $Z$ bosons within the factorization approach of nonrelativistic QCD (NRQCD) at next-to-leading order in ${\alpha }_s$, via intermediate color singlet ${}^3{S}_1^{[1]}$ and ${}^3{P}_J^{[1]}$ and color octet ${{}^{1}S}_0^{[8]}$, ${{}^{3}S}_1^{[8]}$ and ${{}^{3}P}_J^{[8]}$ states. Requiring for our predictions to be compatible with recent ATLAS measurements yields stringent new constraints on charmonium long-distance matrix elements (LDMEs) being nonperturbative, process-independent input parameters. Considering four popular LDME sets fitted to data of single $J/\psi$ inclusive production, we find that one is marginally compatible with the data, with central predictions typically falling short by a factor of three, one is unfavored, the factor of shortfall being about one order of magnitude, and two violate cross section positivity for direct $J/\psi +W/Z$ production. The large rate of prompt $J/\psi$ plus $W$ production observed by ATLAS provides strong evidence for the color octet mechanism inherent to NRQCD factorization, the leading color singlet contribution entering only at $\mathcal{O}(G_F{\alpha }_s^4)$, beyond the order considered here.

arXiv comment6 pages, 2 figures, minor changes, matches journal version

References in corpus (29)

• New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
• Rigorous QCD Analysis of Inclusive Annihilation and Production of Heavy Quarkonium
• Generating Feynman Diagrams and Amplitudes with FeynArts 3
• Improved Nonrelativistic QCD for Heavy Quark Physics
• The renormalization of the axial anomaly in dimensional regularization
• Scalar one-loop integrals for QCD
• OneLOop: for the evaluation of one-loop scalar functions
• Automatic Integral Reduction for Higher Order Perturbative Calculations
• J/psi polarization at hadron colliders in nonrelativistic QCD
• World data of J/psi production consolidate NRQCD factorization at NLO
• Polarization for Prompt J/psi, psi(2s) production at the Tevatron and LHC
• Precision measurement and interpretation of inclusive $W^{+}$, $W^{-}$ and $Z/{\gamma }^{\ast }$ production cross sections with the ATLAS detector
• Measurement of hard double-parton interactions in W->lv+ 2 jet events at sqrt(s)=7 TeV with the ATLAS detector
• QCD radiative corrections to ${\chi }_{cJ}$ production at hadron colliders
• Measurement of inclusive W and Z boson production cross sections in pp collisions at sqrt(s) = 8 TeV
• Impact of ${\eta }_c$ hadroproduction data on charmonium production and polarization within NRQCD framework
• Measurement of the ${\eta }_c(1S)$ production cross-section in proton-proton collisions via the decay ${\eta }_c(1S)\to p\bar{p}$
• ${\eta }_c$ production at LHC and indications on the understanding of $J/\psi$ production
• Fragmentation contributions to hadroproduction of prompt $J/\psi$, ${\chi }_{cJ}$, and $\psi (2S)$ states
• 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
• Measurement of the production cross section of prompt J/psi mesons in association with a W boson in pp collisions at sqrt{s}=7 TeV with the ATLAS detector
• Next-to-leading-order QCD corrections to the yields and polarisations of J/Psi and Upsilon directly produced in association with a Z boson at the LHC
• Associated Production of Heavy Quarkonia and Electroweak Bosons at Present and Future Colliders
• QCD corrections to $J/\psi$ production in association with a $W$-boson at the LHC
• QCD corrections to $J/\psi$ plus $Z^0$-boson production at the LHC
• Production and polarization of $S$-wave quarkonia in potential nonrelativistic QCD
• Measurement of $J/\psi$ production in association with a $W^{\pm }$ boson with $pp$ data at 8 TeV
• Dipole subtraction at next-to-leading order in nonrelativistic-QCD factorization
• Dipole Subtraction vs. Phase Space Slicing in NLO NRQCD Heavy-Quarkonium Production Calculations

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• FKS subtraction for quarkonium production at NLO
• Automated event generation for S-wave quarkonium and leptonium production in NRQCD and NRQED