https://doi.org/10.1140/epjc/s10052-019-6729-0
Regular Article - Theoretical Physics
SU(3) analysis of weak decays of doubly-heavy tetraquarks 
1
School of Physics and Engineering, Qufu Normal University, Qufu, 273165, China
2
INPAC, SKLPPC, MOE Key Laboratory for Particle Physics, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, 200240, China
* e-mail: xingye_guang@sjtu.edu.cn
Received:
15
November
2018
Accepted:
27
February
2019
Published online:
8
March
2019
We study the weak decays of exotic tetraquark states with two heavy quarks. Under the SU(3) symmetry for light quarks, these tetraquarks can be classified into an octet plus a singlet: 
. We will concentrate on the octet tetraquarks with 
, and study their weak decays, both semileptonic and nonleptonic. Hadron-level effective Hamiltonian is constructed according to the irreducible representations of the SU(3) group. Expanding the Hamiltonian, we obtain the decay amplitudes parameterized in terms of a few irreducible quantities. Based on these amplitudes, relations for decay widths are derived, which can be tested in future. We also give a list of golden channels that can be used to look for these states at various colliders.
© The Author(s), 2019
