Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2003-08-11
Physics
High Energy Physics
High Energy Physics - Lattice
Lattice2003(spectrum) 3 pages, 7 figures, uses espcrc2.sty. Corrected typo in equation 4
Scientific paper
10.1016/S0920-5632(03)02544-1
It has been proposed that partially quenched chiral perturbation theory can be used together with partially quenched lattice QCD to determine the low-energy constants of real QCD. We point out a complication of this approach and show how it can be resolved. Partial quenching changes the chiral symmetry group and introduces a new independent four-derivative operator. We explore the effects of this new operator. We describe tree-level scattering processes to which it contributes, and show how they can be used, in principle, to deterimine its unknown coefficient. We also calculate its lowest-order (one-loop) contribution to charged meson masses and decay constants. In addition, we present the form of the analytic next-to-next-to-leading order meson mass and decay constant corrections, which are needed for lattice fits.
de Water Ruth S. Van
Sharpe Stephen R.
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