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Anomalous soft photons: Status and perspectives

https://doi.org/10.1016/j.physrep.2024.10.002

Bailhache, R; Bonocore, D; Braun-Munzinger, P; Feal, X; Floerchinger, S; Klein, J; Köhler, K; Lebiedowicz, P; Peter, CM; Rapp, R; et al (December 2024, Physics Reports)

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.
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Limits on the chiral magnetic effect from the event shape engineering and participant-spectator correlation techniques in Pb–Pb collisions at sNN=5.02 TeV

https://doi.org/10.1016/j.physletb.2026.140672

Abdallah, DAH; Abualrob, IJ; Acharya, S; Agarwal, K; Aglieri_Rinella, G; Aglietta, L; Agrawal, N; Ahammed, Z; Ahmad, S; Ahuja, I; et al (September 2026, Physics Letters B)

Free, publicly-accessible full text available September 1, 2027
Investigating charm quark energy loss in medium with the nuclear modification factor of D0-tagged jets

https://doi.org/10.1016/j.physletb.2026.140299

Acharya, S; Agarwal, A; Aglieri_Rinella, G; Aglietta, L; Agnello, M; Agrawal, N; Ahammed, Z; Ahmad, S; Ahn, SU; Ahuja, I; et al (April 2026, Physics Letters B)

Free, publicly-accessible full text available April 1, 2027
Measurement of the p– $Σ^{+}$ correlation function in pp collisions at $\sqrt{s} = 13$ TeV

https://doi.org/10.1016/j.physletb.2026.140252

Abualrob, IJ; Acharya, S; Aglieri_Rinella, G; Aglietta, L; Agnello, M; Agrawal, N; Ahammed, Z; Ahmad, S; Ahuja, I; Akbar, ZUL; et al (March 2026, Physics Letters B)

Free, publicly-accessible full text available March 1, 2027
Multiplicity dependence of K*(892) ±  production in pp collisions at $\sqrt{s} = 13$ TeV

https://doi.org/10.1016/j.physletb.2026.140253

Abualrob, IJ; Acharya, S; Aglieri_Rinella, G; Aglietta, L; Agnello, M; Agrawal, N; Ahammed, Z; Ahmad, S; Ahuja, I; Akbar, Z; et al (March 2026, Physics Letters B)

Free, publicly-accessible full text available March 1, 2027
Study of the interaction between Ξ baryons and light mesons via femtoscopy at the LHC

https://doi.org/10.1016/j.physletb.2026.140227

Abualrob, IJ; Acharya, S; Aglieri_Rinella, G; Aglietta, L; Agrawal, N; Ahammed, Z; Ahmad, S; Ahuja, I; Akbar, ZUL; Akindinov, A; et al (March 2026, Physics Letters B)

Free, publicly-accessible full text available March 1, 2027
Exclusive photoproduction of excited ρ mesons decaying to four pions in ultraperipheral Pb–Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV

https://doi.org/10.1016/j.physletb.2025.140006

Acharya, S; Adamová, D; Agarwal, A; Rinella, G Aglieri; Aglietta, L; Agnello, M; Agrawal, N; Ahammed, Z; Ahmad, S; Ahn, SU; et al (January 2026, Physics Letters B)

Free, publicly-accessible full text available January 1, 2027
Direct-photon production in inelastic and high-multiplicity proton–proton collisions at $\sqrt{s} =$ 13 TeV

https://doi.org/10.1016/j.physletb.2025.139645

Acharya, S; Agarwal, A; Aglieri_Rinella, G; Aglietta, L; Agnello, M; Agrawal, N; Ahammed, Z; Ahmad, S; Ahn, SU; Ahuja, I; et al (September 2025, Physics Letters B)

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Coherent J/ψ photoproduction at midrapidity in $P b - P b$ collisions at $\sqrt{s_{N N}} = 5.02$ TeV

https://doi.org/10.1016/j.physletb.2025.139952

Acharya, S; Agarwal, A; Aglieri_Rinella, G; Aglietta, L; Agnello, M; Agrawal, N; Ahammed, Z; Ahmad, S; Ahn, SU; Ahuja, I; et al (December 2025, Physics Letters B)

Free, publicly-accessible full text available December 1, 2026
Femtoscopic study of the proton-proton and proton-deuteron systems in heavy-ion collisions at the LHC

https://doi.org/10.1016/j.physletb.2025.139921

Acharya, S; Rinella, G Aglieri; Aglietta, L; Agnello, M; Agrawal, N; Ahammed, Z; Ahmad, S; Ahn, SU; Ahuja, I; Akbar, Zul; et al (December 2025, Physics Letters B)

Free, publicly-accessible full text available December 1, 2026

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