Lattice2010

Session

Parallel 46: Hadron spectroscopy

17 Jun 2010, 16:40

Villasimius, Sardinia

309. Charmonium spectroscopy from Nf=2+1 dynamical anisotropic lattices

Sinead Ryan (Trinity College Dublin)

17/06/2010, 16:40

Hadron spectroscopy

Preliminary results for the charmonium spectrum are presented. The calculation uses distilled quark propagators measured on the N_f=2+1 dynamical anisotropic lattices of the Hadron Spectrum Collaboration and includes an exploration of disconnected diagrams and decays relevant for threshold effects.

26. Update on charm annihilation contribution to the hyperfine splitting in charmonium

Ludmila Levkova (University of Utah)

17/06/2010, 17:00

Hadron spectroscopy

We report our final results for the contributions of the disconnected diagrams to the hyperfine splitting in charmonium. Our study includes both the quenched and dynamical cases on ensembles with lattice spacings of approximately 0.06 fm and 0.09 fm. Our new approach tunes the charm quark mass so that the rest mass of the $\eta_c$ is close to its physical value. This method of...

12. Bottom meson masses from a RHQ action on a fine 2+1 flavor DWF lattice

Peng Hao (Columbia University, USA)

17/06/2010, 17:20

Hadron spectroscopy

We extend our previous relativistic heavy quark (RHQ) charm calculations performed on the $32^3 \times 64$, $1/a=2.32$ GeV RBC/UKQCD lattice ensembles to states including bottom quarks. We calculate masses of bottomium, bottom-strange and bottom-light states, match and compare them to known experimental values. We also compare our results with those determined on the $24^3\times 64,...

127. The spectrum of static-light baryons in twisted mass lattice QCD

Christian Wiese (Humboldt-University Berlin)

17/06/2010, 17:40

Hadron spectroscopy

We compute the static-light baryon spectrum with N_f = 2 flavors of sea quarks using Wilson twisted mass lattice QCD. As valence quarks we consider unitary light quarks (with a corresponding pion mass of around 340 MeV) as well as partially quenched light quarks, which have the mass of the physical strange quark. We extract masses of states with isospin I = 0, I = 1/2 and I = 1, with light...