Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2008-10-14
PoS LATTICE2008:121,2008
Physics
High Energy Physics
High Energy Physics - Lattice
7 Pages, 8 figures, talk presented at the XXVI International Symposium on Lattice Field Theory, July 14-19, 2008, Williamsburg
Scientific paper
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 $32^3\times 64$ 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 $D_s$ meson decay constants evaluated at 3.5 MeV$< m_{\rm ud}<$ 12 MeV with $m_{\rm s}$ 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.
Aoki Sadao
Ishii Naohiro
Ishikawa Kei-Ichi
Ishizuka Naruhito
Izubuchi Taku
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