We search for CP violation in the charged charm meson decay D+→π+π0, based on a data sample corresponding to an integrated luminosity of 921 fb−1 collected by the Belle experiment at the KEKB e+e− asymmetric-energy collider. The measured CP-violating asymmetry is [+2.31±1.24(stat)±0.23(syst)]%, which is consistent with the standard model prediction and has a significantly improved precision compared to previous results.
Physical Review D
Digital Object Identifier (DOI)
et al., V. Babu; Joffe, D.; and Kulasiri, Ratnappuli L., "Search for C P violation in the D + → π + π 0 decay at Belle" (2018). Faculty Publications. 4189.