2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/53735We consider a simplified model of particles with effectively distance dependent statistics, that is particles coupled to a gauge field the Lagrangian of which contains the Chern-Simons term. We analyze the low-lying states of the two-particle system and show that under certain conditions they can exhibit negative compressibility, hinting on a possible à la van der Vaals picture.5 pages, LATEX, Bielefeld University preprint BI-TP 93/59, November 1993High Energy Physics - Theorytext