Coherent exclusive exponentiation CEEX: the case of the resonant e(+)e(-) collision

We present the first-order coherent exclusive exponentiation (CEEX) scheme, with the full control over spin polarization for all fermions, In particul ar it is applicable to difficult case of narrow resonances. The resulting s pin amplitudes and the differential distributions are given in a form ready for their implementation in the Monte Carlo event generator. The initial-f inal state interferences are under control. The way is open to the use of t he exact amplitudes for two and more hard photons, using Weyl-spinor techni ques, without giving up the advantages of the exclusive exponentiation, of the Yennie-Frautschi-Suura type. (C) 1999 Elsevier Science B.V. All rights reserved.