RM3: ISOSCALAR AND ISOVECTOR MESONS UPON UNBREAKING OF CHIRAL SYMMETRY
SEZIONE DI ROMA III
We study the isoscalar and isovector mesons under the exclusion of the low-lying Dirac modes from valence quarks with the overlap operator within two flavour lattice QCD. We analize mesonic correlators and extract states at each level of such low-mode truncation. Our observations support a simultaneous restoration of both SU(2)_L \times SU(2)_R and U(1)_A symmetries. We finally observe a degeneracy of all isovector and isoscalar J=1 mesons which serves as an indication of some higher symmetry in the chirally restored regime.

DATA: 19-11-2014

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