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 { (\qbar\gamma_i\c)(\cbar\gamma_5\s)-(\cbar\gamma_i\s)(\qbar\gamma_5\c)} and the diquark-antidiquark operator { (\q^T C \gamma_i \c)(\sbar C \gamma_5 \cbar^T)- (\q^T C \gamma_5 \c)(\sbar C \gamma_i^T \cbar^T)}, both detect a 1^{ +} resonance with mass around 4010 +- 50 MeV in the limit m_q -> m_{ u,d}.
Categories: hep-lat hep-ph