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Double-J/ψ system in the spotlight of recent LHCb data
by V. Baru, X.-K. Dong, F.-K. Guo, C. Hanhart, A. Nefediev, B.-S. Zou
This Submission thread is now published as
Submission summary
| Authors (as registered SciPost users): | Alexey Nefediev |
| Submission information | |
|---|---|
| Preprint Link: | scipost_202202_00022v1 (pdf) |
| Date accepted: | May 6, 2022 |
| Date submitted: | Feb. 10, 2022, 6:49 p.m. |
| Submitted by: | Alexey Nefediev |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | XXXIII International Workshop on High Energy Physics (IWHEP2021) |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approaches: | Theoretical, Phenomenological |
Abstract
Recently the LHCb Collaboration announced intriguing results on the double-$J/\psi$ production in proton-proton collisions. A coupled-channel interpretation of the measured di-$J/\psi$ spectrum is presented and a possible nature of the proposed near-threshold state $X(6200)$ is discussed.
Published as SciPost Phys. Proc. 6, 007 (2022)
Reports on this Submission
Report #1 by Anonymous (Referee 1) on 2022-3-30 (Invited Report)
- Cite as: Anonymous, Report on arXiv:scipost_202202_00022v1, delivered 2022-03-30, doi: 10.21468/SciPost.Report.4822
Report
Phenomenological importance of this study consists in finding significant ($5\sigma$) evidence for the existence of a resonant structure (X(6200)) in double $J/\psi$ system. The authors analyzed scattering data over the range $6.2<M_X<7.2$ GeV, where a very thorough model-dependent analysis is needed. The authors performed a scrupulous analysis in a minimalistic approach using a couple-channel model and found that X(6200) is more like a $J/\psi-J/\psi$ molecule rather than a tetraquark and estimated the interaction potential in $J/\psi-J/\psi$ systems as well as chromopolarizability. It should also be noticed that this study involves a phenomenological request to compute heavy-quarkonia scattering amplitude on a lattice.