Probing displaced (dark)photons from low reheating freeze-in at the LHC

Paola Arias, Bastián Díaz Sáez, Lucía Duarte +3

We extend the Standard Model (SM) by introducing a $U(1{)}^{\prime }$ gauge boson and a real pseudo-scalar field, both odd under a ${\mathbb{Z}}_2$ symmetry. The resulting low-energy spectrum c…