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- TL;DR Summary
- the long-standing discrepancy between experimental data and predictions based on Low’s soft-photon theorem
Physics Reports
Volume 1097, 18 December 2024, Pages 1-40
are there any explanation for soft-photon puzzle?
is “anomalous” soft photon production evidence for dark matter, perhaps decay of dark matter gives rise to excited soft-photon?
Volume 1097, 18 December 2024, Pages 1-40
Anomalous soft photons: Status and perspectives
Anomalous soft photons: Status and perspectives
Author links open overlay panelR. Bailhache
Abstract
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.
https://www.sciencedirect.com/science/article/pii/S0370157324003478?via=ihub
are there any explanation for soft-photon puzzle?
is “anomalous” soft photon production evidence for dark matter, perhaps decay of dark matter gives rise to excited soft-photon?
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