Energy dependent nuclear suppression from gluon saturation in exclusive vector meson production
Abstract
We calculate the exclusive J/ψ photoproduction cross section at high energies from the Color Glass Condensate approach. The results are compared to the center-of-mass energy dependent γ+A→J/ψ+A cross sections extracted from measurements in ultra peripheral heavy ion collisions at RHIC and LHC. We predict strong saturation-driven nuclear suppression at high energies, while LHC data prefers even stronger suppression. We explore the effect of nucleon shape fluctuations on the nuclear suppression in the coherent and incoherent cross sections, and show that the most recent measurement of the |t|-differential incoherent J/ψ cross section prefers large event-by-event fluctuations of the nucleon substructure in heavy nuclei, comparable to that found for a free proton.
Main Authors
Format
Articles
Research article
Published
2024
Series
Subjects
Publication in research information system
Publisher
American Physical Society (APS)
The permanent address of the publication
https://urn.fi/URN:NBN:fi:jyu-202404303217Käytä tätä linkitykseen.
Review status
Peer reviewed
ISSN
2470-0010
DOI
https://doi.org/10.1103/PhysRevD.109.L071504
Language
English
Published in
Physical Review D
Citation
- Mäntysaari, H., Salazar, F., & Schenke, B. (2024). Energy dependent nuclear suppression from gluon saturation in exclusive vector meson production. Physical Review D, 109(7), Article L071504. https://doi.org/10.1103/PhysRevD.109.L071504
License
Funder(s)
European Commission
European Commission
Research Council of Finland
Research Council of Finland
Funding program(s)
RIA Research and Innovation Action, H2020
ERC Advanced Grant
Academy Research Fellow, AoF
Research costs of Academy Research Fellow, AoF
RIA Research and Innovation Action, H2020
ERC Advanced Grant
Akatemiatutkija, SA
Akatemiatutkijan tutkimuskulut, SA
Additional information about funding
H. M. is supported by the Research Council of Finland, the Centre of Excellence in Quark Matter, and Projects No. 338263 and No. 346567, and under the European Union’s Horizon 2020 research and innovation programme by the European Research Council (ERC, Grant Agreement No. ERC-2018-ADG-835105 YoctoLHC) and by the STRONG-2020 project (Grant Agreement No. 824093) and wishes to thank the Electron-Ion Collider Theory Institute at BNL for its hospitality during the completion of this work. B. P. S. is supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under DOE Contract No. DE-SC0012704 and within the framework of the Saturated Glue (SURGE) Topical Theory Collaboration. F. S. is supported in part by DOE under Contract No. DE-AC02-05CH11231, by NSF under Grant No. OAC-2004571 within the X-SCAPE Collaboration, and the INT’s U.S. DOE under Grant No. DE-FG02-00ER41132. Computing resources from CSC–IT Center for Science in Espoo, Finland and the Finnish Grid and Cloud Infrastructure (persistent identifier urn:nbn:fi:research-infras-2016072533) were used in this work.
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