https://doi.org/10.1140/epjc/s10052-017-5360-1
Regular Article - Theoretical Physics
Weak decays of doubly heavy baryons: the 
case
1
INPAC, Shanghai Key Laboratory for Particle Physics and Cosmology, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, 200240, People’s Republic of China
2
School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, People’s Republic of China
* e-mail: star_0027@sjtu.edu.cn
Received:
13
July
2017
Accepted:
4
November
2017
Published online:
20
November
2017
Very recently, the LHCb collaboration has observed in the final state 
a resonant structure that is identified as the doubly charmed baryon 
. Inspired by this observation, we investigate the weak decays of doubly heavy baryons , 
, 
, 
, 
, 
, 
, 
and 
and focus on the decays into spin 1 / 2 baryons in this paper. At the quark level these decay processes are induced by the 
or 
transitions, and the two spectator quarks can be viewed as a scalar or axial vector diquark. We first derive the hadronic form factors for these transitions in the light-front approach and then apply them to predict the partial widths for the semileptonic and nonleptonic decays of doubly heavy baryons. We find that the number of decay channels is sizable and can be examined in future measurements at experimental facilities like LHC, Belle II and CEPC.
© The Author(s), 2017
