Publications
Publication Information
| Title | Dynamics in near-threshold J/psi photoproduction |
| Authors | Daniel Winney, Cesar Fernandez-Ramirez, Alessandro Pilloni, Astrid Hiller Blin, Miguel Albaladejo, Lukasz Bibrzycki, Jinfeng Liao, Vincent Mathieu, Gloria Montana-Faiget, Robert Perry, Vanamali Shastry, Wyatt Smith, Adam Szczepaniak |
| JLAB number | JLAB-THY-23-3802 |
| LANL number | (None) |
| Other number | DOE/OR/23177-6109 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
| Other Funding: | PHY-2209183 DE-SC0023598 DE-FG02-87ER40365 |
|
Journal Compiled for Physical Review D Volume 108 Page(s) 054018 | |
| Publication Abstract: | The study of J/psi photoproduction at low energies has consequences for the understanding of multiple aspects of nonperturbative QCD, ranging from mechanical properties of the proton, to the binding inside nuclei, and the existence of hidden-charm pentaquarks. Factorization of the photon-ccbar and nucleon dynamics or Vector Meson Dominance are often invoked to justify these studies. Alternatively, open charm intermediate states have been proposed as the dominant mechanism underlying J/psi photoproduction. As the latter violates this factorization, it is important to estimate the relevance of such contributions. We analyse the latest differential and integrated photoproduction cross sections from the GlueX and Hall C experiments. We show that the data can be adequately described by a small number of partial waves, which we parameterize with generic models enforcing low-energy unitarity. The results suggest a non-negligible contribution from open charm intermediate states. Furthermore, most of the models present an elastic scattering length incompatible with previous extractions based on Vector Meson Dominance, and thus call into question its applicability to heavy mesons. Our results indicate a wide array of physics possibilities that are compatible with present data and need to be disentangled. |
| Experiment Numbers: | other |
| Group: | THEORY CENTER |
| Document: | |
| DOI: | https://doi.org/10.1103/PhysRevD.108.054018 |
| Accepted Manuscript: | PhysRevD.108.054018.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |