2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/187225In this paper we calculate the finite-size corrections of an anisotropic integrable spin chain, consisting of spins s=1 and s=1/2. The calculations are done in two regions of the phase diagram with respect to the two couplings $\bar{c}$ and $\tilde{c}$. In case of conformal invariance we obtain the final answer for the ground state and its lowest excitations, which generalizes earlier results.11 pages, LaTeX, uses ioplppt.sty,replaced with published versionHigh Energy Physics - TheoryCondensed Mattertext