The 39th International Symposium on Lattice Field Theory (Lattice 2022)

Evidence for a doubly charm tetraquark in DD∗ scattering

9 Aug 2022, 14:00

20m

CP1-HSZ/0.010 (CP1-HSZ) - HS2 (CP1-HSZ)

Oral Presentation Hadron Spectroscopy and Interactions Hadron Spectroscopy and Interactions

Speaker

Padmanath Madanagopalan (Helmholtz Institut Mainz)

Description

Recently, a doubly charmed tetraquark $T_{cc}$ with flavor $cc\overline{u}\overline{d}$ just $0.36(4)$MeV below $D^0{D}^{\ast +}$ threshold was discovered by the LHCb collaboration. We present the first lattice study of $D{D}^{\ast }$ 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 $D{D}^{\ast }$ scattering amplitude with $l=0$, which is likely related to $T_{cc}$.

Presentation materials

Padmanath_Lattice2022_talk.pdf