2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/50639A quantitative prediction of Conformal Field Theory (CFT), which relates the second moment of the energy-density correlator away from criticality to the value of the central charge, is verified in the sine-Gordon model. By exploiting the boson-fermion duality of two-dimensional field theories, this result also allows to show the validity of the prediction in the strong coupling regime of the Thirring model.5 pages, no figures, latexHigh Energy Physics - Theorytext