PT Journal AU Abele, Hea Algora, A Gonzalez-Alonso, M Novella, P TI Particle physics at the European Spallation Source SO Physics Reports JI Phys. Rep. PY 2023 BP 1 EP 84 VL 1023 DI 10.1016/j.physrep.2023.06.001 LA English DE ESS; Neutrons; NNBAR; ESSnuSB; nEDM AB Presently under construction in Lund, Sweden, the European Spallation Source (ESS) will be the world's brightest neutron source. As such, it has the potential for a particle physics program with a unique reach and which is complementary to that available at other facilities. This paper describes proposed particle physics activities for the ESS. These encompass the exploitation of both the neutrons and neutrinos produced at the ESS for high precision (sensitivity) measurements (searches). ER