2009

The bottomonium spectrum from lattice QCD with 2+1 flavors of domain wall fermions

Meinel, Stefan

Understand

Recently, realistic lattice QCD calculations with 2+1 flavors of domain wall fermions and the Iwasaki gauge action have been performed by the RBC and UKQCD collaborations.

Here, results for the bottomonium spectrum computed on their gauge configurations of size 24^3x64 with a lattice spacing of approximately 0.11 fm and four different values for the light quark mass are presented.
Improved lattice NRQCD is used to treat the b quarks inside the bottomonium.
The results for the radial and orbital energy splittings are found to be in good agreement with experimental measurements, indicating that systematic errors are small.

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