| Issue |
EPJ Web Conf.
Volume 296, 2024
30th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions (Quark Matter 2023)
|
|
|---|---|---|
| Article Number | 07007 | |
| Number of page(s) | 4 | |
| Section | Electromagnetic Probes | |
| DOI | https://doi.org/10.1051/epjconf/202429607007 | |
| Published online | 26 June 2024 | |
https://doi.org/10.1051/epjconf/202429607007
Measurement of low-pT direct-photons with PHENIX
Stony Brook University, Stony Brook, NY 11790, USA
* e-mail: vassu.doomra@stonybrook.edu
Published online: 26 June 2024
Photons provide snapshots of the evolution of relativistic heavy-ion collisions as they are emitted at all stages and do not interact with the medium strongly. With RHIC, measurements of low momentum direct-photons are made possible across different system sizes and beam energies. An excess of direct-photons, above the prompt photon production from hard scattering processes, is observed for a system size corresponding to dNch/dη of 20-30, with a large azimuthal anisotropy and a characteristic dependence on collision centrality. In addition to the results for direct-photon spectra, azimuthal anisotropies of direct-photons in Au+Au collisions at √SNN = 200 GeV are also discussed, thereby, shedding light on the long-standing direct-photon puzzle.
© The Authors, published by EDP Sciences, 2024
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