Hot spots in a proton
Abstract
We explore the consequences of gluonic hot spots inside the proton for the initial eccentricities in a proton-nucleus collision, and the constraints on the parameters describing these hot spots from coherent and incoherent exclusive vector meson production cross sections in deep inelastic scattering. We show that geometric fluctuations of hot spots inside the proton are the dominant source of eccentricity whereas color charge fluctuations only give a negligible correction. We find that the coherent cross section is sensitive to both the size of the target and the structure of the probe. The incoherent cross section is dominated by color fluctuations at small transverse momentum transfer |t|, by proton and hot spot sizes as well as the structure of the probe at medium |t| and again by color fluctuations at large |t|.
Main Authors
Format
Conferences
Conference paper
Published
2024
Series
Subjects
Publication in research information system
Publisher
EDP Sciences
The permanent address of the publication
https://urn.fi/URN:NBN:fi:jyu-202408015313Use this for linking
Parent publication ISBN
978-2-7598-9126-9
Review status
Peer reviewed
ISSN
2101-6275
DOI
https://doi.org/10.1051/epjconf/202429615011
Conference
International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions
Language
English
Published in
EPJ Web of Conferences
Is part of publication
30th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions (Quark Matter 2023)
Citation
- Demirci, S., Lappi, T., & Schlichting, S. (2024). Hot spots in a proton. In R. Bellwied, F. Geurts, R. Rapp, C. Ratti, A. Timmins, & I. Vitev (Eds.), 30th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions (Quark Matter 2023) (Article 15011). EDP Sciences. EPJ Web of Conferences, 296. https://doi.org/10.1051/epjconf/202429615011
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Funder(s)
European Commission
Research Council of Finland
Research Council of Finland
European Commission
European Commission
Funding program(s)
ERC Advanced Grant
Centre of Excellence, AoF
Academy Project, AoF
RIA Research and Innovation Action, H2020
ERC European Research Council, H2020
ERC Advanced Grant
Huippuyksikkörahoitus, SA
Akatemiahanke, SA
RIA Research and Innovation Action, H2020
ERC European Research Council, H2020
Funded by the European Union. Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Education and Culture Executive Agency (EACEA). Neither the European Union nor EACEA can be held responsible for them.
Additional information about funding
S.D. acknowledges the support of the Vilho, Yrjö and Kalle Väisälä Foundation. S.S acknowledges support by
the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through the CRC-TR 211 ’Strong-interaction matter under extreme conditions’– project number 315477589 – TRR 211. S.D. and T.L have been supported by the Academy of Finland, by the Centre of Excellence in Quark Matter (project 346324) and project 321840. This work has also been supported under the European Union’s Horizon 2020 research and innovation programme by the STRONG-2020 project (grant agreement No 824093) and by the European Research Council, grant agreements ERC-2015-CoG-681707 and ERC-2018-AdG-835105. The content of this article does not reflect the official opinion of the European Union and responsibility for the information and views expressed therein lies
entirely with the authors.
Copyright© 2024 the Authors