U. Lindstrom et M. Rocek, A NOTE ON THE SEIBERG-WITTEN SOLUTION OF N=2 SUPER YANG-MILLS THEORY, Physics letters. Section B, 355(3-4), 1995, pp. 492-493
We examine the Seiberg-Witten treatment of N = 2 super Yang-Mills theo
ry, and note that in the strong coupling region of moduli space, some
massive particle excitations appear to have negative norm. We discuss
the significance of our observation.