Weak decays of doubly heavy baryons: Bcc→BcV

The weak decays of a spin-1 / 2 doubly charm baryon ( B cc ) to a spin-1 / 2 singly charm baryon ( B c ) and a light vector meson ( V ) are studied under a phenomenological scheme. The contributions are classified into different topological diagrams, among which the short distance ones are calculate...

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Bibliographic Details
Published in:The European physical journal. C, Particles and fields Particles and fields, 2018-11, Vol.78 (11)
Main Authors: Jiang, Li-Juan, He, Bei, Li, Run-Hui
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics and Cosmology
Elementary Particles
Hadrons
Heavy Ions
Measurement Science and Instrumentation
Nuclear Energy
Nuclear Physics
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Regular Article - Theoretical Physics
String Theory
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Summary:The weak decays of a spin-1 / 2 doubly charm baryon ( B cc ) to a spin-1 / 2 singly charm baryon ( B c ) and a light vector meson ( V ) are studied under a phenomenological scheme. The contributions are classified into different topological diagrams, among which the short distance ones are calculated under the factorization hypothesis, and the long distance contributions are modelled as final-state interactions (FSIs) which are estimated with the one-particle-exchange model. In calculation the topological contributions tend to fall in a hierarchy. The branching fractions or decay widths are estimated, and it indicates that Ξ cc + → Ξ c + π + π - and Ω cc + → Ξ c + K - π + can be used as candidate decays for searching Ξ cc + and Ω cc + . Some decays that are mainly activated by the long distance effects are found, observation on which in future experiments can help to understand the role of FSIs in charm baryon decays.
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-018-6445-1