Tcc+(3875) relevant DD* scattering from N f =2 lattice QCD

The S-wave DD* scattering in the isospin I = 0, 1 channels is studied in N (f )= 2 lattice QCD at m pi asymptotic to 350 MeV. It is observed that the DD* interaction is repulsive in the I = 1 channel when the DD* energy is near the DD* threshold. In contrast, the DD* interaction in the I = 0 channel is definitely attractive in a wide range of the DD* energy. This is consistent with the isospin assignment I = 0 for T (+)(cc)(3875). By analyzing the components of the DD* correlation functions, it turns out that the quark diagram responsible for the different properties of I = 0, 1 DD* interactions can be understood as the charged p meson exchange effect. This observation provides direct information on the internal dynamics of T-cc(+)(3875). (C) 2022 The Author(s). Published by Elsevier B.V.

Automated summary

In this study, the S-wave DD* scattering in the isospin I = 0, 1 channels is investigated using N(f) = 2 lattice QCD method with a pion mass of about 350 MeV. It is found that the DD* interaction is repulsive in the I = 1 channel near the DD* threshold, while it is attractve in a wide range of the DD* energy in the I = 0 channel. The analysis of the DD* correlation functions indicates that the difference in the properties of I = 0, 1 DD* interactions can be attributed to the charged pion exchange effect. This observation provides direct insights into the internal dynamics of T-cc(+)(3875).