2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/149223In this talk I present recent results on Lorentz covariant correlation functions $\langle q(p_1)\overline{q}(p_2)\rangle$ on the cone $p^2=0$. In particular, chiral symmetry breaking terms are constructed which resemble fermionic 2--point functions of 2--D CFT up to a scalar factor.LaTex, 7 pages, one misleading remark corrected and a comment addedHigh Energy Physics - TheoryHigh Energy Physics - Phenomenologytext