Unbreaking chiral symmetry

Details Unbreaking chiral symmetry Unbreaking chiral symmetry

2011-07-26

arxiv.org/abs/1107.5195v2

Phys. Rev. D 84 (2011) 087704

Physics

High Energy Physics

High Energy Physics - Lattice

5 pages, 5 figures (figure added, references updated)

Scientific paper

10.1103/PhysRevD.84.087704

In Quantum Chromodynamics (QCD) the eigenmodes of the Dirac operator with small absolute eigenvalues have a close relationship to the dynamical breaking of the chiral symmetry. In a simulation with two dynamical quarks, we study the behavior of meson propagators when removing increasingly more of those modes in the valence sector, thus partially removing effects of chiral symmetry breaking. We find that some of the symmetry aspects are restored (e.g., the masses of $\rho$ and $a_1$ approach each other) while confining properties persist.

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