# S. Prelovšek Komelj and M. Padmanath find evidence for the longest-lived exotic hadron

Date of publication: 13. 7. 2022
In focus
Their article in Physical Review Letters establishes this state with an ab initio theoretical study for the first time

The state is composed of two quarks c and antiquarks u and d and was experimentally discovered at CERN by the LHCb collaboration in July 2021 (Nature Physics). It contains more than three valence quarks and therefore represents an exotic hadron. The authors determine the relevant scattering amplitude using ab-initio lattice simulations and find the pole, which is related to the tetraquark state.