Jul 6 – 13, 2022
Bologna, Italy
Europe/Rome timezone

Double charm tetraquark in $DD^*$ scattering from lattice QCD

Jul 9, 2022, 4:05 PM
Room 1 (Europa Auditorium)

Room 1 (Europa Auditorium)

Parallel Talk Strong interactions and Hadron Physics Strong interactions and Hadron Physics


Padmanath Madanagopalan (Helmholtz Institut Mainz)


The LHCb collaboration recently discovered a doubly charmed tetraquark $T_{cc}$ with flavor $cc\bar u\bar d$ just $0.36(4)~$MeV below $D^0D^{*+}$ threshold. This is the longest lived hadron with explicitly exotic quark content known to this date. We present the first lattice QCD study of $DD^*$ scattering in this channel, involving rigorous determination of pole singularities in the related scattering amplitudes that point to the existence of $T_{cc}$. Working with a heavier than physical light quark mass, we find evidence for a shallow virtual bound state pole in the $DD^*$ scattering amplitude with $l=0$, which is likely related to $T_{cc}$.

In-person participation Yes

Primary authors

Padmanath Madanagopalan (Helmholtz Institut Mainz) Prof. Sasa Prelovsek (Jozef Stefan Institute, Ljubljana, Slovenia)

Presentation materials