https://doi.org/10.1140/epjc/s10052-019-7150-4
Regular Article - Theoretical Physics
Fully heavy tetraquark 
: lifetimes and weak decays
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:
30
April
2019
Accepted:
18
July
2019
Published online:
7
August
2019
We study the lifetime and weak decays of the full-heavy S-wave 
tetraquark 
. Using the operator product expansion rooted in heavy quark expansion, we find a rather short lifetime, at the order 
depending on the inputs. With the flavor SU(3) symmetry, we then construct the effective Hamiltonian at the hadron level, and derive relations between decay widths of different channels. According to the electro-weak effective operators, we classify different decay modes, and make a collection of the golden channels, such as 
for the charm quark decay and 
for the bottom quark decay. Our results for the lifetime and golden channels are helpful to search for the fully-heavy tetraquark in future experiments.
© The Author(s), 2019
