%0 Electronic Article
%A Kling, Felix
%A Reimitz, Peter
%A Ritz, Adam
%T Dark Vector Boson Bremsstrahlung: New Form Factors for a Broader Class of Models
%N arXiv:2509.09437
%M PUBDB-2026-00404
%M arXiv:2509.09437
%M UCI-TR-2025-16
%D 2026
%X We explore the sensitivity of collider experiments to a broad class of GeV-scale dark vector models of new physics via production in proton and neutron bremsstrahlung and initial state radiation. This is achieved using a new physically motivated model for timelike vector form factors with generic charges for both protons and neutrons, which is fit to a variety of timelike and spacelike data with quantified uncertainties. The production model for both proton and neutron bremsstrahlung is applied to re-cast and extend the reach of existing FASER data to GeV-mass dark photons, U(1)_B, U(1)_B-L, and photophobic vectors, as well as forecasts for millicharged particles at FORMOSA.
%F PUB:(DE-HGF)25
%9 Preprint
%U https://bib-pubdb1.desy.de/record/644562