%0 Journal Article
%A Bailhache, Raphaelle
%A Bonocore, D.
%A Braun-Munzinger, Peter
%A Feal, X.
%A Floerchinger, S.
%A Klein, J.
%A Köhler, K.
%A Lebiedowicz, P.
%A Peter, C. M.
%A Rapp, R.
%A Reygers, K.
%A Schäfer, W.
%A Scheid, H. S.
%A Schweda, Kai
%A Stachel, Johanna
%A van Hees, H.
%A van Veen, C. A.
%A Völkl, M.
%T Anomalous soft photons: Status and perspectives
%J Physics reports
%V 1097
%N arXiv:2406.17959
%@ 0370-1573
%C Amsterdam [u.a.]
%I Elsevier Science, North-Holland
%M GSI-2025-00294
%M arXiv:2406.17959
%P 1-40
%D 2024
%Z This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:001342368500001
%R 10.1016/j.physrep.2024.10.002
%U https://repository.gsi.de/record/356916