Tcc+ coupled channel analysis and predictions

A coupled channel analysis of the D*D-+(0) and D*D-0(+) system is performed to study the doubly charmed T-cc(+) state recently discovered by the LHCb collaboration. We use a simple model for the scattering amplitude and production mechanism that allows us to describe well the experimental spectrum, and obtain the T-cc(+) pole in the coupled channel T-matrix. We find that this bound state has a large molecular component. The isospin (I = 0 or I = 1) of the state cannot be inferred from the (DD0)-D-0 pi(+) spectrum alone, although there is some experimental evidence that points to the I = 0 interpretation. Therefore, we use the same formalism to predict other DD pi spectra. In the case the T-cc(+) has I = 1, we also predict the location of the other two members (T-cc(+) and T-cc(0)) of the triplet. Finally, using Heavy-Quark Spin Symmetry, we predict the location of possible heavier D*D* (I = 0 or I= 1) partners. (C) 2022 The Author(s). Published by Elsevier B.V.

Automated summary

A coupled channel analysis is conducted on the D*D-+(0) and D*D-0(+) system to study the recently discovered doubly charmed T-cc(+) state by the LHCb collaboration. The study provides predictions and analysis on the properties and composition of the T-cc(+) state, as well as the possible locations of other related particles.