An experimental investigation of the decays K± → π0π0π±: The slope parameter and its charge asymmetry

Abstract The slope parameter and its charge asymmetry have been measured for the τ′ decay mode of the charged K mesons. No charge asymmetry in the parameter is observed to the precision level of 1.25%, indicating the absence of CP violating transitions. The result for the slope parameter is consistent with previous measurements and taken with other results on K π 3 decay modes supports the conclusion that the ΔI = 1 2 rule is not exact.