https://doi.org/10.1140/epjc/s10052-019-6925-y
Regular Article - Theoretical Physics
Sum rules for CP asymmetries of charmed baryon decays in the 
limit
School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, People’s Republic of China
* e-mail: dwang15@lzu.edu.cn
Received:
31
March
2019
Accepted:
5
May
2019
Published online:
21
May
2019
Motivated by the recent LHCb observation of CP violation in charm, we study CP violation in the charmed baryon decays. A simple method to search for the CP violation relations in the flavor SU(3) limit, which is associated with a complete interchange of d and s quarks, is proposed. With this method, hundreds of CP violation sum rules in the doubly and singly charmed baryon decays can be found. As examples, the CP violation sum rules in two-body charmed baryon decays are presented. Some of the CP violation sum rules could help the experiment to find better observables. As byproducts, the branching fraction of 
is predicted to be 
in the U-spin limit and the fragmentation–fraction ratio is determined to be 
using the LHCb data.
© The Author(s), 2019
