ICHEP 2024

Search for dark photons in heavy-ion collisions

18 Jul 2024, 12:10

17m

South Hall 1A

Parallel session talk 03. Beyond the Standard Model Beyond the Standard Model

Speaker

Adrian William Romero Jorge (Frankfurt Institute for Advanced Studies, Ruth Moufang Str. 1, 60438 Frankfurt, Germany & Institut für Theoretische Physik, Johann Wolfgang Goethe-Universität, Max-von-Laue-Str. 1, 60438 Frankfurt am Main, Germany)

Description

The vector $U$-bosons, or so called 'dark photons', are one of the possible candidates for the dark matter mediators. We present a procedure to define theoretical constraints on the upper limit of ${ϵ}^2(M_U)$ from heavy-ion as well as $p+p$ and $p+A$ dilepton data from SIS to LHC energies. We used the microscopic Parton-Hadron-String Dynamics (PHSD) transport approach which reproduces well the measured dilepton spectra in $p+p$, $p+A$ and $A+A$ collisions. In addition to the different dilepton channels originating from interactions and decays of ordinary (Standard Model) matter particles (mesons and baryons), we incorporate in the PHSD the decay of hypothetical $U$-bosons to dileptons, $U\to e^{+}{e}^{-}$, where the $U$-bosons themselves are produced by the Dalitz decay of pions, $\eta$-mesons, Delta resonances as well as by vector meson decays. This analysis can help to estimate the requested accuracy for future experimental searches of 'light' dark photons by dilepton experiments.

Presentation materials

ICHEP2024_Romero_v2.pdf

ICHEP2024_Romero_v3.pdf