Three-body final state interactions in D + → K − π + π +

Patrícia C. Magalhães1 , M. R. Robilotta1, K. S. F. F. Guimarães2, T. Frederico2, W. de Paula2, A. C. dos Reis3, I. Bediaga3. 1 Instituto de Física, Universidade de São Paulo, São Paulo, SP, Brazil, 05315-970; 2 Instituto Tecnológico de Aeronáutica, São José dos Campos, SP, Brazil, 12.228-900; 3 Centro Brasileiro de Pesquisas Físicas, Rio de Janeiro, RJ, Brazil, 22290-180. We stress the importance of three-body final state interactions in D+ → K−π+π+. The basic building block is the Kπ amplitude with parameters determined by a fit to elastic LASS data. Based on a vector weak vertex, we can describe the Kπ phase production experimental in the elastic region.