Abstract
We first construct the effective chiral Lagrangians for the 1−+ exotic mesons. With the infrared regularization scheme, we derive the one-loop infrared singular chiral corrections to the π1(1600) mass explicitly. We investigate the variation of the different chiral corrections with the pion mass under two schemes. Hopefully, the explicit non-analytical chiral structures will be helpful for the chiral extrapolation of lattice data from the dynamical lattice QCD simulation of either the exotic light hybrid meson or the tetraquark state.
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