出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We study heavy-heavy and heavy-light quark systems for charm with a relativistic heavy quark
action in 2+1 flavor lattice QCD. Configurations are generated by the PACS-CS Collaboration at
the lattice spacing is a = 0.09 fm with the lattice size of 323×64 employing the O(a)-improved
Wilson quark action and the Iwasaki gauge action. We present preliminary results for the charmonium
spectrum and the D and Ds meson decay constants evaluated at 3.5 MeV< mud < 12
MeV with ms around the physical value. We investigate the dynamical quark mass dependences
of the hyperfine and the orbital splittings. The decay constants are compared with the recent
experimental values.
