Study on Ξcc→Ξc and Ξcc→Ξc′ weak decays in the light-front quark model

• Published in: The European physical journal. C, Particles and fields Particles and fields, 2020-02, Vol.80 (2)
• Main Authors: Ke, Hong-Wei, Lu, Fang, Liu, Xiao-Hai, Li, Xue-Qian
• Format: Article
• Language: English
• Subjects: Astronomy; Astrophysics and Cosmology; Decay; Elementary Particles; Form factors; Hadrons; Heavy Ions; Leptons; Measurement Science and Instrumentation; Nuclear Energy; Nuclear Physics; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quark models; Quarks; Regular Article - Theoretical Physics; String Theory; Subsystems
• ISSN: 1434-6044; 1434-6052
• DOI: 10.1140/epjc/s10052-020-7699-y

In this work we study the weak decays of Ξ cc → Ξ c and Ξ cc → Ξ c ′ in the light-front quark model. Generally, a naive, but reasonable conjecture suggests that the cc subsystem in Ξ cc ( us pair in Ξ c ( ′ ) ) stands as a diquark with definite spin and color assignments. During the concerned processes, the diquark of the initial state is not a spectator, namely must be broken. A Racah transformation would decompose the original ( cc ) q into a combination of c ( cq ) components. Thus we may deal with the decaying c quark alone while keeping the ( cq ) subsystem as a spectator. With the re-arrangement of the inner structure we calculate the form factors numerically and then obtain the rates of semi-leptonic decays and non-leptonic decays, which will be measured in the future.