CP violation in non-leptonic Bc decays to excited final states

• Published in: The European physical journal. C, Particles and fields Particles and fields, 2021-04, Vol.81 (4)
• Main Authors: Zhou, Tian, Wang, Tianhong, Fu, Hui-Feng, Wang, Zhi-Hui, Huo, Lei, Wang, Guo-Li
• Format: Article
• Language: English
• Subjects: Astronomy; Astrophysics and Cosmology; Channels; CP violation; Decay; Elementary Particles; Hadrons; Heavy Ions; Matter & antimatter; Measurement Science and Instrumentation; Nuclear Energy; Nuclear Physics; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Regular Article - Theoretical Physics; String Theory
• ISSN: 1434-6044; 1434-6052
• DOI: 10.1140/epjc/s10052-021-09128-2

We study the CP violation in two-body nonleptonic decays of B c meson. We concentrate on the decay channels which contain at least one excited heavy meson in the final states. Specifically, the following channels are considered: B c → c c ¯ ( 2 S , 2 P ) + c ¯ q ( 1 S , 1 P ) , B c → c c ¯ ( 1 S ) + c ¯ q ( 2 S , 2 P ) , B c → c c ¯ ( 1 P ) + c ¯ q ( 2 S ) , B c → c c ¯ ( 1 D ) + c ¯ q ( 1 S , 1 P ) , and B c → c c ¯ ( 3 S ) + c ¯ q ( 1 S ) . The improved Bethe-Salpeter method is applied to calculate the hadronic transition matrix element. Our results show that some decay modes have large branching ratios, which is of the order of 10 - 3 . The CP violation effect in B c → η c ( 1 S ) + D ( 2 S ) , B c → η c ( 1 S ) + D 0 ∗ ( 2 P ) , and B c → J / ψ + D ∗ ( 2 S ) are most likely to be found. If the detection precision of the CP asymmetry in such channels can reach the 3 σ level, at least 10 7 B c events are needed.