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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 | |
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Preprint Link: | scipost_202202_00022v1 (pdf) |
Date accepted: | May 6, 2022 |
Date submitted: | Feb. 10, 2022, 6:49 p.m. |
Submitted by: | Nefediev, Alexey |
Submitted to: | SciPost Physics Proceedings |
Proceedings issue: | XXXIII International Workshop on High Energy Physics (IWHEP2021) |
Ontological classification | |
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Academic field: | Physics |
Specialties: |
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Approaches: | Theoretical, Phenomenological |
Abstract
Recently the LHCb Collaboration announced intriguing results on the double-J/ψ production in proton-proton collisions. A coupled-channel interpretation of the measured di-J/ψ 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 (5σ) evidence for the existence of a resonant structure (X(6200)) in double J/ψ 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/ψ−J/ψ molecule rather than a tetraquark and estimated the interaction potential in J/ψ−J/ψ 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.