Abstract
The doubly charm tetraquark with flavor and isospin is investigated by calculating the scattering amplitude with lattice QCD. The simulation is done on CLS ensembles with dynamical , quarks and for two charm quark masses, one slightly larger and one slightly lower than the physical value. The scattering amplitudes for partial waves , 1 are extracted near threshold via the Lüscher method by considering systems with total momenta on two spatial volumes. A virtual bound state pole in the scattering amplitude with is found below the threshold for the charm quark mass closer to the physical value. This pole is likely related to the doubly charm tetraquark discovered by LHCb less than 1 MeV below the threshold. Future lattice simulations closer to the continuum limit and physical quark masses would be valuable to establish this connection systematically.
- Received 2 March 2022
- Revised 19 April 2022
- Accepted 24 June 2022
DOI:https://doi.org/10.1103/PhysRevLett.129.032002
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Published by the American Physical Society