%0 Conference Paper
%A Jorge, Adrian William Romero
%A Bratkovskaya, Elena
%A Song, Taesoo
%A Sagunski, Laura
%T Exploring Dark Photon Production and Kinetic Mixing Constraints in Heavy-Ion Collisions
%J Astronomische Nachrichten
%N arXiv:2412.02536
%@ 1521-3994
%C Berlin
%I Wiley-VCH Verl.
%M GSI-2024-01298
%M arXiv:2412.02536
%P e20240132
%D 2025
%Z "This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properlycited."
%X Vector U-bosons, often referred to as 'dark photons', are potential candidates for mediating dark matter interactions. In this study, we outline a procedure to derive theoretical constraints on the upper bound of the kinetic mixing parameter ϵ<sup>2</sup>(M<sub>U</sub>) using dilepton data from heavy-ion from SIS to RHIC energies. The analysis is based on the microscopic Parton-Hadron-String Dynamics (PHSD) transport model, which successfully reproduces the measured dilepton spectra in p+p, p+A, and A+A collisions. Besides the dilepton channels resulting from interactions and decays of Standard Model particles (such as mesons and baryons), we extend the PHSD approach to include the decay of hypothetical U-bosons into dileptons, U → e<sup>+</sup> e<sup>−</sup>. The production of these U-bosons occurs via Dalitz decays of pions, η-mesons, ω-mesons, Delta resonances, as well as from the decays of vector mesons and K<sup>+</sup> mesons. This analysis provides an upper limit on ϵ<sup>2</sup>(M<sub>U</sub>) and offers insights into the accuracy required for future experimental searches for dark photons through dilepton experiments.
%B THE INTERNATIONAL WORKSHOP ON ASTRONOMY AND RELATIVISTIC ASTROPHYSICS
%C 2 Sep 2024 - 6 Sep 2024, Machu Picchu Pueblo (Peru)
Y2 2 Sep 2024 - 6 Sep 2024
M2 Machu Picchu Pueblo, Peru
%F PUB:(DE-HGF)16 ; PUB:(DE-HGF)8
%9 Journal ArticleContribution to a conference proceedings
%U <Go to ISI:>//WOS:001381107800001
%R 10.1002/asna.20240132
%U https://repository.gsi.de/record/354865