Abstract
Recently, a new symmetry of mesons has been found upon truncation of the quasizero modes of the overlap Dirac operator in lattice simulations. Namely, the , , , , , , , and possibly mesons get degenerate after removal of the quasizero modes. This emergent symmetry has been established to be . It is higher than the symmetry of the QCD Lagrangian and provides not only a mixing of quarks of given chirality in the isospin space, but also the mixing of left-handed and right-handed components. Here we study, with the overlap Dirac operator, the isovector mesons upon the quasizero mode reduction and observe a similar degeneracy. This result further supports the symmetry in mesons of given spin .
- Received 13 May 2015
DOI:https://doi.org/10.1103/PhysRevD.91.114512
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