A1 Journal article (refereed)
Energy dependent nuclear suppression from gluon saturation in exclusive vector meson production (2024)

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

JYU authors or editors

Publication details

All authors or editors: Mäntysaari, Heikki; Salazar, Farid; Schenke, Björn

Journal or series: Physical Review D

ISSN: 2470-0010

eISSN: 2470-0029

Publication year: 2024

Publication date: 15/04/2024

Volume: 109

Issue number: 7

Article number: L071504

Publisher: American Physical Society (APS)

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevD.109.L071504

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/94589

Publication is parallel published: https://arxiv.org/abs/2312.04194

Additional information: Letter

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.

Keywords: gluons; quantum chromodynamics; particle physics; nuclear physics

Contributing organizations

Related projects

Ministry reporting: Yes

Reporting Year: 2024

Preliminary JUFO rating: 2