What question did this study set out to answer?

The aim is to study the production of dark photons in pion-proton collisions.

March 22, 2026Open Access

Pion bremsstrahlung in the splitting function formalism and the dark photon production

Puntos clave

The aim is to study the production of dark photons in pion-proton collisions.
Examined dark photon production via pion bremsstrahlung and QCD Drell-Yan-like processes.
Estimated total production cross section for dark photons.
Calculated energy distribution of dark photons from NA64h experiment and from secondary pions in T2K, DUNE, and SHiP experiments.
Identified dark photon masses in the range of 0.4–3.5 GeV.
Provided mean energies of dark photons produced in specific high-energy experiments.

Resumen

A bstract We study the production of hypothetical vector portal mediators, dark photons γ ′ , with masses in the range 0.4–3.5 GeV in the negatively charged pion-proton collisions π − p → γ ′ X via inelastic pion bremsstrahlung and QCD Drell-Yan-like process. In both cases we estimate the value of total dark photon production cross section and obtain the energy distribution for dark photons that could be produced in the NA64h experiment. We also present the mean energies of dark photons produced in the same way by the secondary pions with momenta typical for T2K, DUNE and SHiP experiments.

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