Scalar or Vector Tetraquark State Candidate: Zc(4100) *

Zhi-Gang Wang

Fig. 2 The pole residues with variations of the Borel parameters $T^2$ for the tetraquark states, (a), (b), (c) and (d) denote the $[uc]_{\tilde{A}}[\bar{d}\bar{c}]_{\tilde{A}}$, $[uc]_{\tilde{V}}[\bar{d}\bar{c}]_{\tilde{V}}$, $[uc]_S[\bar{d}\bar{c}]_{\tilde{V}}-[uc]_{\tilde{V}}[\bar{d}\bar{c}]_S$ and $[uc]_S[\bar{d}\bar{c}]_{\tilde{A}}-[uc]_{\tilde{A}}[\bar{d}\bar{c}]_S$ tetraquark states, respectively, the regions between the two perpendicular lines are the Borel windows.