Producing fully-charm structures in the $J/\psi$-pair invariant mass spectrum

Abstract

Very recently, the LHCb Collaboration reported the observation of several enhancements in the invariant mass spectrum of a $J/\psi$ pair between 6.2 and 7.4 GeV. In this work, we propose the dynamical mechanism to mimic the experimental data of a di-$J/\psi$ mass spectrum given by LHCb, which is based on the reactions, where all the possible combinations of a double charmonium directly produced by a proton-proton collision are transferred into a final state $J/\psi J/\psi$. We find that the LHCb experimental data can be well reproduced. We further extend our framework to study a di-${\rm Y}(1S)$ system, and give the line shape of a differential cross section of a partner process in a $b\bar{b}$ system on the invariant mass of ${\rm Y}(1S){\rm Y}(1S)$, which shows that there should exist possible enhancements near $m_{{\rm Y}(1S){\rm Y}(1S)}=$19.0, 19.3, 19.7 GeV in the ${\rm Y}(1S)$-pair invariant mass spectrum. These predictions can be tested in LHCb and CMS, which can be as a potential research issue in near future.

arXiv comment5 pages, 1 table and 2 figures

References in corpus (71)

• Rigorous QCD Analysis of Inclusive Annihilation and Production of Heavy Quarkonium
• Hadronic molecules
• The hidden-charm pentaquark and tetraquark states
• The $XYZ$ states: experimental and theoretical status and perspectives
• Non-Standard Heavy Mesons and Baryons, an Experimental Review
• Pentaquark and Tetraquark states
• Observation of structure in the $J/\psi$-pair mass spectrum
• Multiquark States
• The Possible Interpretations of Y(4260)
• Coupled-channel model for charmonium levels and an option for X(3872)
• $QQ\bar{Q}\bar{Q}$ states: masses, production, and decays
• Observation of X(3872) production in pp collisions at sqrt(s)= 7 TeV
• Hunting for exotic doubly hidden-charm/bottom tetraquark states
• HELAC-Onia: an automatic matrix element generator for heavy quarkonium physics
• Comprehensive description of $J/\psi$ production in proton-proton collisions at collider energies
• Production of the X(3872) at the Tevatron and the LHC
• A non-relativistic model for the $[cc][\bar{c}\bar{c}]$ tetraquark
• Heavy-flavored tetraquark states with the $QQ\bar{Q}\bar{Q}$ configuration
• Spectrum of fully-heavy tetraquarks from a diquark+antidiquark perspective
• Four-quark spectroscopy within the hyperspherical formalism
• New Observables in Inclusive Production of Quarkonia
• QCD radiative corrections to ${\chi }_{cJ}$ production at hadron colliders
• Masses of fully heavy tetraquarks $QQ\bar{Q}\bar{Q}$ in an extended relativized quark model
• Tetraquarks composed of 4 heavy quarks
• All-heavy tetraquarks
• Coupled-Channel and Screening Effects in Charmonium Spectrum
• Double J/psi-meson Production at LHC and 4c-tetraquark state
• ${\eta }_c$ production at the LHC challenges nonrelativistic-QCD factorization
• Tetraquark bound states in a Bethe-Salpeter approach
• All-charm tetraquarks
• J/psi-Pair Production at Large Momenta: Indications for Double-Parton Scatterings and Large alpha_s^5 Contributions
• A $bb\bar{b}\bar{b}$ di-bottomonium at the LHC?
• Spectrum of the fully-heavy tetraquark state $QQ{\bar{Q}}^{\prime }{\bar{Q}}^{\prime }$
• Full-heavy tetraquarks in constituent quark models
• Measurement of the ${\eta }_c(1S)$ production cross-section in proton-proton collisions via the decay ${\eta }_c(1S)\to p\bar{p}$
• The Search for Beauty-fully Bound Tetraquarks Using Lattice Non-Relativistic QCD
• String dynamics and metastability of fully-heavy tetraquarks
• ${\eta }_c$ production at LHC and indications on the understanding of $J/\psi$ production
• The Simple Spectrum of $c\bar{c}c\bar{c}$ States in the Dynamical Diquark Model
• Doubly-hidden scalar heavy molecules and tetraquarks states from QCD at NLO
• Production of J/psi+eta(c) vs. J/psi+J/psi at the LHC: Impact of Real alpha_s^5 corrections
• Beauty-full Tetraquarks
• Proton Structure in Transverse Space and the Effective Cross Section
• A study of $cc\bar{c}\bar{c}$ tetraquark decays in 4 muons and in $D^{(\ast )}{\bar{D}}^{(\ast )}$ at LHC
• Towards the understanding of fully-heavy tetraquark states from various models
• Nature of X(3872) from data
• Fragmentation contributions to hadroproduction of prompt $J/\psi$, ${\chi }_{cJ}$, and $\psi (2S)$ states
• Strong decays of fully-charm tetraquarks into di-charmonia
• Strong and electromagnetic decays of the light scalar mesons interpreted as tetraquark states
• Analysis of the vector and axialvector $QQ\bar{Q}\bar{Q}$ tetraquark states with QCD sum rules
• Higher bottomonium zoo
• Impact of $J/\psi$ pair production at the LHC and predictions in nonrelativistic QCD
• Ambiversion of X(3872)
• Stability of tetrons
• Tetraquark candidates in the LHCb's di-$J/\psi$ mass spectrum
• Double-quarkonium production at a fixed-target experiment at the LHC (AFTER@LHC)
• Scale Factor in Double Parton Collisions and Parton Densities in Transverse Space
• Pair Production of Heavy Quarkonium and $B_c{(}^{\ast })$ Mesons at Hadron Colliders
• Complete Nonrelativistic-QCD Prediction for Prompt Double $J/\psi$ Hadroproduction
• Deciphering the recently discovered tetraquark candidates around 6.9 GeV
• Delicate interplay between the D0-D*0, rho0-J/psi, and omega-J/psi channels in the X(3872) resonance
• Minijets and the Two-Body Parton Correlation
• Analysis of hidden-bottom bb\bar{b}\bar{b} states
• Complete NLO QCD study of single- and double-quarkonium hadroproduction in the colour-evaporation model at the Tevatron and the LHC
• Production of $J/\psi +{\chi }_c$ and $J/\psi +J/\psi$ with real gluon emission at LHC
• Double prompt $J/\psi$ hadroproduction in the parton Reggeization approach with high-energy resummation
• Fully-heavy tetraquark states and their evidences in the LHC observations
• Potential model prediction of fully-heavy tetraquarks $QQ\bar{Q}\bar{Q}$ ($Q=c,b$)
• Doubly hidden-charm/bottom $QQ\bar{Q}\bar{Q}$ tetraquark states
• ${\chi }_{cJ}$ production associated with a $c\bar{c}$ pair at hadron colliders
• Fully-charm tetraquarks: $cc\bar{c}\bar{c}$

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• An updated review of the new hadron states
• New structures in the J/$\psi$J/$\psi$ mass spectrum in proton-proton collisions at $\sqrt{s}$ = 13 TeV
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• Insights into the inner structures of the fully charmed tetraquark state $X(6900)$
• Is the existence of a $J/\psi J/\psi$ bound state plausible?
• Exotic resonances of fully-heavy tetraquarks in a lattice-QCD insipired quark model
• Hunting for states in the recent LHCb di-$J/\psi$ invariant mass spectrum
• Higher mass spectra of the fully-charmed and fully-bottom tetraquarks
• Mass spectra and wave functions of $T_{QQ\bar{Q}\bar{Q}}$ tetraquarks
• Higher fully-charmed tetraquarks: Radial excitations and P-wave states
• $S$-wave fully charmed tetraquark resonant states
• Fully heavy pentaquarks
• Benchmark calculations of fully heavy compact and molecular tetraquark states
• Heavy Flavour Physics and CP Violation at LHCb: a Ten-Year Review
• The lineshape of the compact fully heavy tetraquark
• Going in quest of potential tetraquark interpretations for the newly observed $T_{\psi \psi }$ states in light of the diquark-antidiquark scenarios
• Hunting for tetraquarks in ultra-pheripheral heavy ion collisions
• Masses of fully-heavy tetraquark states from a four-quark static potential model
• 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
• Decay behaviors of the fully-bottom and fully-charm tetraquark states
• Fully heavy pentaquark states in constituent quark model
• Triply-heavy tetraquarks in an extended relativized quark model
• Improved understanding of the peaking phenomenon existing in the new di-$J/\psi$ invariant mass spectrum from the CMS Collaboration
• The two-photon decay of X(6900) from light-by-light scattering at the LHC
• Nature of the $X(6900)$ in partial wave decomposition of $J/\psi J/\psi$ scattering
• A possible interpretation for $X(6900)$ observed in four-muon final state by LHCb -- A light Higgs-like boson?
• The two-body strong decays of the fully-charm tetraquark states
• Fully charmed P-wave tetraquark resonant states in the quark model
• Strong decays of the fully-charm tetraquark states with explicit P-waves via the QCD sum rules
• Discovering an Unquenched Dynamics Mechanism for Charmonium Scattering
• Four-Charm-Quark Matter from the CMS Collaboration as a Witness of the Development of High-Precision Hadron Spectroscopy
• All Heavy Tetraquarks: The Dynamical Diquark Model and Other Approaches