TY  - JOUR
AU  - Du, M. L.
AU  - Filin, A.
AU  - Baru, V.
AU  - Dong, X. K.
AU  - Epelbaum, E.
AU  - Guo, F. K.
AU  - Hanhart, C.
AU  - Nefediev, A.
AU  - Nieves, J.
AU  - Wang, Q.
PY  - 2023
DA  - 2023//
TI  - Role of Left-Hand Cut Contributions on Pole Extractions from Lattice Data: Case Study for Tcc(3875)+
T2  - Phys. Rev. Lett.
JO  - Physical Review Letters
SP  - 131903
EP  - 7pp
VL  - 131
IS  - 13
PB  - Amer Physical Soc
AB  - We discuss recent lattice data for the T-cc(3875)(+) state to stress, for the first time, a potentially strong impact of left-hand cuts from the one-pion exchange on the pole extraction for near-threshold exotic states. In particular, if the left-hand cut is located close to the two-particle threshold, which happens naturally in the DD* system for the pion mass exceeding its physical value, the effective-range expansion is valid only in a very limited energy range up to the cut and as such is of little use to reliably extract the poles. Then, an accurate extraction of the pole locations requires the one-pion exchange to be implemented explicitly into the scattering amplitudes. Our findings are general and potentially relevant for a wide class of hadronic near-threshold states.
SN  - 0031-9007
UR  - https://arxiv.org/abs/2303.09441
UR  - https://doi.org/10.1103/PhysRevLett.131.131903
DO  - 10.1103/PhysRevLett.131.131903
LA  - English
N1  - WOS:001255049200001
ID  - Du_etal2023
ER  -