High-Precision Charm-Quark Mass from Current-Current Correlators in Lattice and Continuum QCD
May, 20089 pages
Published in:
- Phys.Rev.D 78 (2008) 054513
e-Print:
- 0805.2999 [hep-lat]
PDG: -QUARK MASS
Report number:
- BNL-HET-08-11,
- TTP08-18,
- SFB-CPP-08-28
Experiments:
View in:
Citations per year
Abstract: (arXiv)
We use lattice QCD simulations, with MILC configurations and HISQ -quark propagators, to make very precise determinations of moments of charm-quark pseudoscalar, vector and axial-vector correlators. These moments are combined with new four-loop results from continuum perturbation theory to obtain several new determinations of the \msb mass of the charm quark. We find GeV, or, equivalently, GeV. This agrees well with results from continuum analyses of the vector correlator using experimental data for annihilation (instead of using lattice QCD simulations). These lattice and continuum results are the most accurate determinations to date of this mass. We also obtain a new result for the QCD coupling: \alpha_\msb^{(n_f=4)}(3 \mathrm{GeV}) = 0.230 (18), or, equivalently, \alpha_\msb^{(n_f=5)}(M_Z) = 0.113 (4).- 12.38.Gc
- 12.38.Aw
- 11.15.Ha
- lattice field theory
- quantum chromodynamics
- continuum limit
- correlation function: vector
- correlation function: axial-vector
- current: correlation function
- correlation function: pseudoscalar
References(38)
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