2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/38665We report an investigation of criticality in QCD at finite isovector chemical potential, mu_3, and at zero temperature. At the critical point, mu_3^c = m_pi, we find that an uncharged scalar and pseudoscalar and a charged pseudoscalar meson become massless within the resolution of our measurement. The effective long distance theory therefore breaks O(4) symmetry by charged pion condensation. This results in a rising quark number susceptibility. The baryon remains massive, as indicated by a vanishing baryon number susceptibility.5 pages, 3 figuresHigh Energy Physics - LatticeHigh Energy Physics - PhenomenologyNuclear Theorytext