Anomalous soft photons: Status and perspectives
This report summarizes the work of the EMMI Rapid Reaction Task Force on "Real and Virtual Photon Production at Ultra-Low Transverse Momentum and Low Mass at the LHC". We provide an overview of the soft-photon puzzle, i.e., of the long-standing discrepancy between experimental data and predictions based on Low's soft-photon theorem, also referred to as "anomalous" soft photon production, and we review the current theoretical understanding of soft radiation and soft theorems. We also focus on low-mass dileptons as a tool for determining the electrical conductivity of the medium produced in high-energy nucleus-nucleus collisions. We discuss how both topics can be addressed with the planned ALICE 3 detector at the LHC.
Authors
- K. Köhler
- K. Schweda
- Martin Andreas Volkl (ORCID: https://orcid.org/0000-0002-3478-4259)
- Wolfgang Schaefer (ORCID: https://orcid.org/0000-0002-0764-0372)
- Xabier Feal (ORCID: https://orcid.org/0000-0002-3258-2020)
- Domenico Bonocore (ORCID: https://orcid.org/0000-0002-8672-5584)
- Piotr Lebiedowicz (ORCID: https://orcid.org/0000-0003-1963-6263)
- Horst Sebastian Scheid (ORCID: https://orcid.org/0000-0003-1184-9627)
- P. Braun‐Munzinger (ORCID: https://orcid.org/0000-0003-2527-0720)
- Stefan Floerchinger (ORCID: https://orcid.org/0000-0002-3428-4625)
- Johanna Stachel (ORCID: https://orcid.org/0000-0003-0750-6664)
- Ralf Rapp (ORCID: https://orcid.org/0000-0003-3020-4402)
- C. A. van Veen (ORCID: https://orcid.org/0000-0003-1199-4445)
- Hendrik van Hees (ORCID: https://orcid.org/0000-0003-0729-2117)
- R. Bailhache (ORCID: https://orcid.org/0000-0001-7987-4592)
- J. Klein (ORCID: https://orcid.org/0000-0002-1301-1636)
- K. Reygers (ORCID: https://orcid.org/0000-0001-9808-1811)
- C. Peter (ORCID: https://orcid.org/0009-0008-9207-9911)
Publication Details
- Journal
- Physics Reports
- Published
- 2024-10-22
- DOI
- https://doi.org/10.1016/j.physrep.2024.10.002
- Citations
- 4
- Primary Topic
- Cold Atom Physics and Bose-Einstein Condensates
- Type
- article
- Field-Weighted Citation Impact
- 1.35
Funders
- National Science Foundation
- Deutsche Forschungsgemeinschaft
- Emberi Eroforrások Minisztériuma
- ExtreMe Matter Institute, GSI Helmholtzzentrum für Schwerionenforschung