Weak decays of doubly heavy baryons: SU(3) analysis

Wang, Wei (INPAC, Shanghai Key Laboratory for Particle Physics and Cosmology, School of Physics and Astronomy, Shanghai Jiao Tong University, 0000 0004 0368 8293, 200240, Shanghai, China) ; Xing, Zhi-Peng (INPAC, Shanghai Key Laboratory for Particle Physics and Cosmology, School of Physics and Astronomy, Shanghai Jiao Tong University, 0000 0004 0368 8293, 200240, Shanghai, China) ; Xu, Ji (INPAC, Shanghai Key Laboratory for Particle Physics and Cosmology, School of Physics and Astronomy, Shanghai Jiao Tong University, 0000 0004 0368 8293, 200240, Shanghai, China)

23 November 2017

Abstract: Motivated by the recent LHCb observation of doubly charmed baryon Ξcc++ in the Λc+K-π+π+ final state, we analyze the weak decays of doubly heavy baryons Ξcc , Ωcc , Ξbc , Ωbc , Ξbb and Ωbb under the flavor SU(3) symmetry. The decay amplitudes for various semileptonic and nonleptonic decays are parametrized in terms of a few SU(3) irreducible amplitudes. We find a number of relations or sum rules between decay widths and CP asymmetries, which can be examined in future measurements at experimental facilities like LHC, Belle II and CEPC. Moreover, once a few decay branching fractions have been measured in the future, some of these relations may provide hints for exploration of new decay modes.


Published in: EPJC 77 (2017) 800
Published by: Springer/Società Italiana di Fisica
DOI: 10.1140/epjc/s10052-017-5363-y
License: CC-BY-3.0



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