A novel observable for CP violation in multi-body decays and its application potential to charm and beauty meson decays

Abstract

A novel observable measuring the CP asymmetry in multi-body decays of heavy mesons, which is called the forward-backward asymmetry induced CP asymmetry (FBI-CPA), ACPFB, is introduced. This observable has the dual advantages that 1) it can isolate the CP asymmetry associated with the interference of the S- and P-wave amplitude from that associated with the S- or P-wave amplitude alone; 2) it can effectively almost double the statistics comparing to the conventionally defined regional CP asymmetry. We also suggest to perform the measurements of FBI-CPA in some three-body decay channels of charm and beauty mesons.

Keywords

• CP violation
• Multi-body decay
• Heavy meson
• B meson
• D meson