https://doi.org/10.1140/epja/s10050-022-00752-4
Regular Article - Theoretical Physics
Analysis of the doubly-charmed tetraquark molecular states with the QCD sum rules
Department of Physics, North China Electric Power University, 071003, Baoding, People’s Republic of China
Received:
15
December
2021
Accepted:
26
May
2022
Published online:
27
June
2022
In the present work, we investigate the scalar, axialvector and tensor doubly-charmed tetraquark molecular states without strange, with strange and with doubly-strange via the QCD sum rules, and try to make assignment of the 
from the LHCb collaboration in the scenario of molecular states. The predictions favor assigning the to be the lighter 
molecular state with the spin-parity 
and isospin 
, while the heavier molecular state with the spin-parity and isospin 
still escapes experimental detections, the observation of the heavier molecular state would shed light on the nature of the 
. All the predicted doubly-charmed tetraquark molecular states can be confronted to the experimental data in the future.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022
