Quark mass dependence of pseudo-scalar masses and coupling constants qq+q Collaboration

✍ Scribed by F. Farchioni; C. Gebert; I. Montvay; E. Scholz; L. Scorzato

• Book ID: 104354661
• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 257 KB
• Volume: 129-130
• Category: Article
• ISSN: 0920-5632
• DOI: 10.1016/s0920-5632(03)02522-2

✦ Synopsis

The dependence of pseudo-scalar masses and decay constants on the sea and valence quark masses is investigated in the pseudo-Goldstone boson sector of QCD with two light quark flavours. The sea quark masses are a.t present in the range $m, 5 mud < trn,, whereas the valence quark masses satisfy imseo 5 mval 5 2mseo. The values of the Gasser-Leutwyler low energy constants L4, Lg, LG and Ls are estimated. The computation is done with the Wilson-quark lattice action at gauge coupling ,0 = 5.1 on 164 lattices. (3(a) effects are taken into account by applying chiral perturbation theory for the Wilson lattice action as proposed by Rupak and Shoresh.