摘要
Within mixed-action chiral perturbation theory （MAxPT）, Sasa＇s derivation of the bubble contribution to scalar a0 meson is extended to those of scalar K and o- mesons. We revealed that the K bubble has two double poles and the （~ bubble contains a quadratic-in-t2 growth factor stemming from the multiplication of two double poles for a general mass tuning of valence quarks and sea quarks. The corresponding preliminary analytical expressions in MAxPT with 2＋1 chiral valence quarks and 2＋1 staggered sea quarks will be helpful for lattice studies of scalar mesons.
Within mixed-action chiral perturbation theory （MAxPT）, Sasa＇s derivation of the bubble contribution to scalar a0 meson is extended to those of scalar K and o- mesons. We revealed that the K bubble has two double poles and the （~ bubble contains a quadratic-in-t2 growth factor stemming from the multiplication of two double poles for a general mass tuning of valence quarks and sea quarks. The corresponding preliminary analytical expressions in MAxPT with 2＋1 chiral valence quarks and 2＋1 staggered sea quarks will be helpful for lattice studies of scalar mesons.
基金
Supported by Fundamental Research Funds for the Central Universities(2010SCU23002)
