We report new results obtained in our lattice studies of the Sp(4) gauge theory coupled to two fundamental Dirac fermions. This theory provides a candidate for the dynamical origin of dark matter models within the strongly interacting massive particle paradigm. We employ L\"uscher's formalism to analyse finite-volume energy levels and study the scattering amplitude of two pseudoscalar states in the spin-1 channel. We present our preliminary findings for a set of ensembles generated within a broad range of (Wilson) fermion masses.
@article{arxiv.2603.19557,
title = {Vector-channel scattering of dark particles in a Sp(4) gauge theory},
author = {Jong-Wan Lee and Ed Bennett and Yannick Dengler and Deog Ki Hong and Ho Hsiao and C. -J. David Lin and Biagio Lucini and Axel Maas and Maurizio Piai and Davide Vadacchino and Fabian Zierler},
journal= {arXiv preprint arXiv:2603.19557},
year = {2026}
}
Comments
10 pages, 3 figures, 1 table, Proceedings of the 42nd International Symposium on Lattice Field Theory (LATTICE2025), 2-8 Nov. 2025, Mumbai, India