Probing millicharged particles with NA64
and LDMX
Sergei N. Gninenko, N. V. Krasnikov, Sergey Kuleshov, Valery E. Lyubovitskij, P. Crivelli, D. V. Kirpichnikov, L. Molina Bueno, Alexey S. Zhevlakov, H. Sieber and I. V. Voronchikhin
Eur. Phys. J. C, 86 2 (2026) 140
DOI: https://doi.org/10.1140/epjc/s10052-026-15307-w