Janos Balog (Research Institute for Particle and Nuclear Physics, Budapest, Hungary)

Structure functions and form factor clustering
in the 2-dimensional O(n) non-linear sigma-model

We study (the 1+1 dimensional analog of) DIS and structure functions in the 2-dimensional (asymptotically free) non-linear O(n) sigma-models using the non-perturbative S-matrix bootstrap program. The exact small (Bjorken) x behaviour is derived.