The path-integral approach to the N=2 linear sigma model E. N. Argyres, M. T. M. van Kessel and R. H. P. Kleiss Eur. Phys. J. C, 64 2 (2009) 319-349 Published online: 22 September 2009 DOI: 10.1140/epjc/s10052-009-1131-y