${\eta }_c$ production at the LHC challenges nonrelativistic-QCD factorization

Abstract

We analyze the first measurement of ${\eta }_c$ production, performed by the LHCb Collaboration, in the nonrelativistic-QCD (NRQCD) factorization framework at next-to-leading order (NLO) in the strong-coupling constant ${\alpha }_s$ and the relative velocity $v$ of the bound quarks including the feeddown from $h_c$ mesons. Converting the long-distance matrix elements (LDMEs) extracted by various groups from $J/\psi$ yield and polarization data to the ${\eta }_c$ case using heavy-quark spin symmetry, we find that the resulting NLO NRQCD predictions greatly overshoot the LHCb data, while the color-singlet model provides an excellent description.

arXiv comment5 pages, 2 figures, minor changes, note regarding arXiv:1411.7350 [hep-ph] added, accepted for publication in Physical Review Letters

References in corpus (23)

• New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
• Rigorous QCD Analysis of Inclusive Annihilation and Production of Heavy Quarkonium
• Improved Nonrelativistic QCD for Heavy Quark Physics
• J/psi polarization at hadron colliders in nonrelativistic QCD
• J/psi (psi') production at the Tevatron and LHC at O(α_s^4v^4) in nonrelativistic QCD
• Reconciling J/psi production at HERA, RHIC, Tevatron, and LHC with NRQCD factorization at next-to-leading order
• J/psi polarization at Tevatron and LHC: Nonrelativistic-QCD factorization at the crossroads
• World data of J/psi production consolidate NRQCD factorization at NLO
• Polarization for Prompt J/psi, psi(2s) production at the Tevatron and LHC
• Fragmentation contributions to J/psi production at the Tevatron and the LHC
• Improved determination of color-singlet nonrelativistic QCD matrix elements for S-wave charmonium
• Complete next-to-leading-order corrections to J/psi photoproduction in nonrelativistic quantum chromodynamics
• ${\eta }_c$ production at LHC and indications on the understanding of $J/\psi$ production
• Next-to-leading-order tests of nonrelativistic-QCD factorization with $J/\psi$ yield and polarization
• Measurement of the ratio of prompt ${\chi }_c$ to $J/\psi$ production in $pp$ collisions at $\sqrt{s}=7$ TeV
• J/psi plus jet associated production in two-photon collisions at next-to-leading order
• $O({\alpha }_s{v}^2)$ Corrections to Hadronic and Electromagnetic Decays of ${}^1{S}_0$ Heavy Quarkonium
• Relativistic Correction to Color Octet J/psi Production at Hadron Colliders
• eta_c production at the Large Hadron Collider
• eta_c Production at the Tevatron: A test of NRQCD
• Production of ${\eta }_Q$ meson at LHC
• h_c Production at Hadron Colliders
• Relativistic corrections to prompt $J/\psi$ photo- and hadroproduction

Cited by in corpus (83)

• Heavy-flavour and quarkonium production in the LHC era: from proton-proton to heavy-ion collisions
• The ALICE experiment: a journey through QCD
• New Observables in Inclusive Production of Quarkonia
• Impact of ${\eta }_c$ hadroproduction data on charmonium production and polarization within NRQCD framework
• ${\eta }_c$ 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
• Production and polarization of prompt $J/\psi$ in the improved color evaporation model using the $k_T$-factorization approach
• Probing the Weizsäcker-Williams gluon Wigner distribution in pp collisions
• NRQCD Confronts LHCb Data on Quarkonium Production within Jets
• Complete Nonrelativistic-QCD Prediction for Prompt Double $J/\psi$ Hadroproduction
• An Updated Study for ${\rm Y}$ Production and Polarization at the Tevatron and LHC
• Producing fully-charm structures in the $J/\psi$-pair invariant mass spectrum
• Conceptual design of the Spin Physics Detector
• Matching factorization theorems with an inverse-error weighting
• Associated production of a quarkonium and a Z boson at one loop in a quark-hadron-duality approach
• Semi-analytical calculation of gluon fragmentation into ${}^1{S}_0^{[1,8]}$ quarkonia at next-to-leading order
• Are there any challenges in the charmonia production and polarization at the LHC?
• Measurement of the ${\eta }_c(1S)$ production cross-section in $pp$ collisions at $\sqrt{s}=13$ TeV
• Bottomonia production and polarization in the NRQCD with $k_T$-factorization. I: ${\rm Y}(3S)$ and ${\chi }_b(3P)$ mesons
• Double prompt $J/\psi$ hadroproduction in the parton Reggeization approach with high-energy resummation
• ${\eta }_c^{\prime }$ Hadroproduction at Next-to-Leading Order and its Relevance to ${\psi }^{\prime }$ Production
• Measurement of the inclusive J/$\psi$ polarization at forward rapidity in pp collisions at $\sqrt{s}=8$ TeV
• The remaining parts for the long-standing J/psi polarization puzzle
• Polarization of prompt $J/\psi$ and ${\rm Y}$(1S) production in the color evaporation model
• Inclusive production of $J/\psi$, $\psi (2S)$, and ${\rm Y}$ states in pNRQCD
• Phenomenological NLO analysis of eta(c) production at the LHC in the collider and fixed-target modes
• Fully-heavy structures in the invariant mass spectrum of $J/\psi \psi (3686)$, $J/\psi \psi (3770)$, $\psi (3686)\psi (3686)$, and $J/\psi {\rm Y}(1S)$ at hadron colliders
• Polarized Heavy Quarkonium Production in the Color Evaporation Model
• Heavy quarkonium photoproduction in ultrarelativistic heavy ion collisions
• Production and polarization of $S$-wave quarkonia in potential nonrelativistic QCD
• Quarkonium production at the LHC: a phenomenological analysis of surprisingly simple data patterns
• Prompt hadroproduction of ${\eta }_c(1S,2S)$ in the $k_T$-factorization approach
• Quarkonium production at the LHC: a data-driven analysis of NRQCD's predictions
• Gluon fragmentation into quarkonium at next-to-leading order using FKS subtraction
• ${\eta }_c$ production in photon - induced interactions at the LHC
• QCD leading order study of the $J/\psi$ leptoproduction at HERA within the nonrelativistic QCD framework
• Improved understanding of the peaking phenomenon existing in the new di-$J/\psi$ invariant mass spectrum from the CMS Collaboration
• QCD Corrections to the Color-singlet $J/\psi$ Production in Deeply Inelastic Scattering at HERA
• The ${\gamma }^{\ast }{\gamma }^{\ast }\to {\eta }_c(1S,2S)$ transition form factors for spacelike photons
• Prospects for quarkonium studies at the high-luminosity LHC
• Prompt ${\eta }_c$ meson production at the LHC in the NRQCD with $k_T$-factorization
• Matching next-to-leading-order and high-energy-resummed calculations of heavy-quarkonium-hadroproduction cross sections
• Deciphering the $X(3872)$ via its polarization in prompt production at the CERN LHC
• Global analysis of $\psi (2S)$ inclusive hadroproduction at next-to-leading order in nonrelativistic-QCD factorization
• Revisiting the production of $J/\psi$ pairs at the LHC
• Relativistic correction to gluon fragmentation function into pseudoscalar quarkonium
• Dipole subtraction at next-to-leading order in nonrelativistic-QCD factorization
• The complete study on polarization of ${\rm Y}(nS)$ hadroproduction at QCD next-to-leading order
• Relativistic corrections to $J/\psi$ polarization in photo- and hadroproduction
• HELAC-Onia 2.0: an upgraded matrix-element and event generator for heavy quarkonium physics
• Energy Dependence of Direct-Quarkonium Production in pp Collisions from Fixed-Target to LHC Energies: Complete One-Loop Analysis
• Fragmentation function of $g\to Q\bar{Q}{(}^3{S}_1^{[8]})$ in soft gluon factorization and threshold resummation
• How well does nonrelativistic QCD factorization work at next-to-leading order?
• Hard diffractive ${\eta }_{\mathrm{c},\mathrm{b}}$ hadroproduction at the LHC
• Is the colour-octet mechanism consistent with the double $J/\psi$ production measurement at B-factories?
• Dipole Subtraction vs. Phase Space Slicing in NLO NRQCD Heavy-Quarkonium Production Calculations
• Bottomonium production and polarization in the NRQCD with $k_T$-factorization. III: ${\rm Y}(1S)$ and ${\chi }_b(1P)$ mesons
• Inclusive diffractive ${\eta }_{\mathrm{c}}$ production in pp, pA and AA modes at the LHC
• Bottomonia production and polarization in the NRQCD with $k_T$-factorization. II: ${\rm Y}(2S)$ and ${\chi }_b(2P)$ mesons
• Kinematic distributions of the ${\eta }_c$ photoproduction in $ep$ collisions within the nonrelativistic QCD framework
• Statistical analysis of the azimuthal asymmetry in the $J/\psi$ leptoproduction in unpolarized $ep$ collisions
• Production of $S$-wave charmonia in the soft gluon resummation approach using the NRQCD
• ${\chi }_{c1}$ and ${\chi }_{c2}$ polarization as a probe of color octet channel
• Inclusive production of heavy quarkonium ${\eta }_Q$ via $Z$ boson decays within the framework of nonrelativistic QCD
• Inclusive, prompt and non-prompt $\mathrm{J}/\psi$ production at midrapidity in p$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Charmonia production in p+p collisions under NRQCD formalism
• Study of charmonium production via the decay to $p\bar{p}$ at $\sqrt{s}=13TeV$
• Associated production of prompt $J/\psi$ and ${\rm Y}$ mesons in $pp$ collisions at $\sqrt{s}=13\mathrm{TeV}$
• ${\eta }_c$ production associated with light hadrons at the B-factories and the future super B-factories
• Resolving negative cross section of quarkonium hadroproduction using soft gluon factorization
• Impact of $Z\to {\eta }_{c,b}+g+g$ on the inclusive ${\eta }_{c,b}$ meson yield in $Z$-boson decay
• Next-to-leading order QCD corrections to $Z\to {\eta }_Q+Q+\bar{Q}$
• Exclusive photoproduction of $B_c^{\pm }$ and bottomonia pairs
• Study of charmonium production using decays to hadronic final states with the LHCb experiment
• NLO QCD Corrections to Inclusive Charmonium and $B_c$ Meson Production in $W^{+}$ Decays
• Inclusive $J/\psi$ and ${\eta }_c$ production in ${\rm Y}$ decay at $\mathcal{O}({\alpha }_s^5)$ in nonrelativistic QCD factorization
• Bottomonia production in p+p collisions under NRQCD formalism
• Relativistic effect of $J/\psi$ hadroproduction in large $p_T$ region
• ${\eta }_Q$ meson photoproduction in ultrarelativistic heavy ion collisions
• Inclusive ${\chi }_{cJ}$ production in ${\rm Y}$ decay at $\mathcal{O}({\alpha }_s^5)$ in NRQCD factorization
• QCD corrections of $e^{+}{e}^{-}\to J/\psi +c+\bar{c}$ using the principle of maximum conformality
• The QED contribution to $J/\psi$ plus light hadrons production at B-factories
• Next-to-leading order analysis of $J/\psi +\gamma$ production in photon-photon collisions at CEPC