# Weak decays of triply heavy baryons

Wang, Wei (INPAC, Shanghai Key Laboratory for Particle Physics and Cosmology, MOE Key Laboratory for Particle Physics, Astrophysics and Cosmology, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China) ; Xu, Ji (INPAC, Shanghai Key Laboratory for Particle Physics and Cosmology, MOE Key Laboratory for Particle Physics, Astrophysics and Cosmology, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China)

25 May 2018

Abstract: After the experimental establishment of doubly heavy baryons, baryons with three quarks are the last missing pieces of the lowest-lying baryon multiplets in the quark model. In this work, we study semileptonic and nonleptonic weak decays of triply heavy baryons, ${\Omega }_{ccc}^{++}$, ${\Omega }_{ccb}^{+}$, ${\Omega }_{cbb}^{0}$, and ${\Omega }_{bbb}^{-}$. Decay amplitudes for various channels are parametrized in terms of a few SU(3) irreducible amplitudes. We point out that branching fractions for Cabibbo-allowed processes, ${\Omega }_{ccc}^{++}\to \left({\Xi }_{cc}^{++}{\overline{K}}^{0},{\Xi }_{cc}^{++}{K}^{-}{\pi }^{+},{\Omega }_{cc}^{+}{\pi }^{+},{\Xi }_{c}^{+}{D}^{+},\phantom{\rule{0ex}{0ex}}{\Xi }_{c}^{\prime }{D}^{+},{\Lambda }_{c}{D}^{+}{\overline{K}}^{0},{\Xi }_{c}^{+}{D}^{0}{\pi }^{+},{\Xi }_{c}^{0}{D}^{+}{\pi }^{+}\right)$, may reach a few percent. We suggest our experimental colleagues to perform a search at hadron colliders and the electron and positron collisions in the future, which will presumably lead to discoveries of triply heavy baryons and complete the baryon multiplets. Using the expanded amplitudes, we derive a number of relations for the partial widths that can be examined in the future.

Published in: Physical Review D 97 (2018)