Weak decays of doubly heavy baryons: four-body nonleptonic decay channels

The LHCb Collaboration announced the observation of doubly charmed baryon through Xi(++)(cc) -> Lambda K-+(c)-pi(+)pi(+) in 2017. Since then, a series of studies of doubly heavy baryons have been presented. Xi(++)(cc) was discovered through nonleptonic four-body decay mode, and experimental data have indicated that the decay modes of Xi(++)(cc) are not saturated by two- and three-body intermediate states. In this work, we analyze the four-body weak decays of doubly heavy baryons Xi(++)(cc), Xi(+)(cc), and Omega(+)(cc). Decay amplitudes for various channels are parameterized in terms of SU(3) irreducible amplitudes. We point out that branching fractions for Cabibbo-allowed processes Xi(+)(cc) -> Lambda(+)(c)pi(+)pi K-0(-), Omega(+)(cc)-> Lambda(+)(c)pi(+)(K) over bar K-0(-) would be helpful to search for Xi(+)(cc) and Omega(+)(cc) in future measurements at experimental facilities like LHC, Belle II, and CEPC.

Automated summary

This study focuses on the analysis of four-body weak decays of doubly heavy baryons Xi(++)(cc), Xi(+)(cc), and Omega(+)(cc), highlighting the significance of branching fractions for Cabibbo-allowed processes to search for Xi(+)(cc) and Omega(+)(cc) in future experiments at facilities such as LHC, Belle II, and CEPC.