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hep-lat2004
Quark mass dependence of the pseudoscalar hairpin vertex
W. Bardeen, E. Eichten, H. Thacker
In a recent investigation of chiral behavior in quenched lattice QCD, the flavor-singlet pseudoscalar ``hairpin'' vertex associated with the eta prime mass was studied for pion mas…
hep-lat2004
Computing Electromagnetic Effects in Fully Unquenched QCD
A. Duncan, E. Eichten, R. Sedgewick
The inclusion of electromagnetic effects in unquenched QCD can be accomplished using ensembles generated in dynamical simulations with pure QCD provided the change in the quark det…
hep-ph2004
Charmonium levels near threshold and the narrow state $X(3872) \to π^{+}π^{-}\jpsi$
Estia J. Eichten, Kenneth Lane, Chris Quigg
We explore the influence of open-charm channels on charmonium properties, and profile the 1:3D2, 1:3D3 and 2:1P1 charmonium candidates for X(3872). The favored candidates, the 1:3D…