Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2009-05-06
Phys.Rev.Lett.103:121601,2009
Physics
High Energy Physics
High Energy Physics - Lattice
4 pages, 2 figures, 1 table; final version, in print at Phys. Rev. Lett
Scientific paper
10.1103/PhysRevLett.103.121601
The variational method allows one to study the mixing of interpolators with different chiral transformation properties in the non-perturbatively determined physical state. It is then possible to define and calculate in a gauge-invariant manner the chiral as well as the partial wave content of the quark-antiquark component of a meson in the infrared, where mass is generated. Using a unitary transformation from the chiral basis to the LSJ basis one may extract a partial wave content of a meson. We present results for the ground state of the rho-meson using quenched simulations as well as simulations with two dynamical quarks, all for lattice spacings close to 0.15 fm. We point out that these results indicate a simple 3S1-wave composition of the rho-meson in the infrared, like in the SU(6) flavor-spin quark model.
Glozman Leonid Ya.
Lang Christian B.
Limmer Markus
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