Abstract
We investigate the mass spectrum of 1^{+} exotic mesons with quark content (\c\s\cbar\qbar) or (\c\q\cbar\sbar), using molecular and diquark-antidiquark operators, in quenched lattice QCD with exact chiral symmetry. For the molecular operator {(\qbarγ_i\c)(\cbarγ_5\s)-(\cbarγ_i\s)(\qbarγ_5\c)} and the diquark-antidiquark operator {(\q^T C γ_i \c)(\sbar C γ_5 \cbar^T)- (\q^T C γ_5 \c)(\sbar C γ_i^T \cbar^T)}, both detect a 1^{+} resonance with mass around 4010 +- 50 MeV in the limit m_q -> m_{u,d}.
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