https://doi.org/10.1140/epjc/s10052-023-11572-1
Regular Article - Theoretical Physics
Study on the weak decay between two heavy baryons 
in the light-front quark model
1
School of Science, Tianjin University, 300072, Tianjin, China
2
Princeton Neuroscience Institute, Princeton University, 08544, Princeton, NJ, USA
Received:
12
March
2023
Accepted:
1
May
2023
Published online:
16
May
2023
In this work, we study the weak decay between two heavy baryons in the light-front quark model where three-quark picture is employed for baryon. We derive general form of transition amplitude of 
, and analyze two specific cases of transitions: the weak decays of single heavy baryon 
and the decays of double-charmed baryon 
. We compute the hadronic form factors for the transitions and apply them to study the decay widths of the semi-leptonic 
and non-leptonic 
. Previously we studied the transition with the quark–diquark picture of baryon in the light-front quark model. Here we revisit this transition with three-quark picture of baryon. At the quark level, the transition is induced by the 
transition.The subsystem of the two unchanged light quarks which possesses definite and same spin in initial and final state can be viewed as a spectator, so the spectator approximation can be applied directly. For the weak decay of doubly charmed baryon 
, a c quark decays to a light quark 
, so both the initial state cc and final state 
( and the original 
in initial state may be the same flavor quarks) which possess definite spin are no longer spectators. A rearrangement of quarks for initial and final states is adopted to isolate the unchanged subsystem 
which can be viewed as the spectator approximately. Future measurements on these channels will constrain the nonperturbative parameter in the wavefunctions and test the model predictions.
© The Author(s) 2023
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