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