Pole analysis on the doubly charmed meson in (DD0)-D-0 pi(+) mass spectrum

In this paper, we study the scattering amplitudes of (DD0)-D-0 pi(+)-D*D-+(0) coupled channels based on the K matrix within the Chew-Mandelstam formalism. The (DD0)-D-0 pi(+ ) invariant mass spectrum of LHCb is fitted, and the pole parameters of the T-cc(+) are extracted. The analysis of pole behavior suggests that the T-cc(+) may originate from a D*D-+(0) virtual state and is formed as a result of an interplay between an attractive interaction between D-0 and D*(+) and coupling to (DD0)-D-0 pi(+) channel.