Perturbative QCD Evidence for Spin-2 Particles in the Di-$J/\psi$ Resonances

Abstract

We extend the nonrelativistic QCD framework to explore the nature of the newly discovered di-$J/\psi$ resonances. Assuming them as either molecule-like states or tetraquarks, we calculated their hadroproduction cross sections at the LHC. We find that the observed resonances are most likely spin-2 particles, and there should exist their spin-0 counterparts near these resonances. The ratio of production cross sections of the observed resonances to the latent spin-0 ones are also presented, which might help to distinguish molecule-like states from tetraquarks.

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Cited by in corpus (6)

• Fragmentation of fully heavy tetraquarks: The TQ4Q1.1 functions as a case study
• Unwinding the rare $\Omega$ sector: Fragmentation of fully charmed baryons from HL-LHC to FCC
• Pseudoscalar heavy-quarkonium hadroproduction from nonrelativistic fragmentation at NLL/NLO${}^{+}$
• Multimodal Fragmentation of All-Heavy Pentaquarks: Uncertainty-Aware Predictions for Hadron Colliders
• All-charm tetraquarks at hadron colliders: A high-precision fragmentation perspective
• Fully heavy tetraquark states with a diquark-antidiquark configuration