The sigma-Meson Production in Excited Upsilon Decay Processes

Toshihiko Komada, Muneyuki Ishida, Shin Ishida

We analyze the pipi production amplitudes in the excited Upsilon decay processes, Upsilon (2S) to Upsilon (1S)pi^+pi^-, Upsilon (3S) to Upsilon (1S)pi^+pi^- and Upsilon (3S) to Ups…