High-Precision Charm-Quark Mass from Current-Current Correlators in Lattice and Continuum QCD

Collaboration
May, 2008
9 pages
Published in:
  • Phys.Rev.D 78 (2008) 054513
e-Print:
Report number:
  • BNL-HET-08-11,
  • TTP08-18,
  • SFB-CPP-08-28
Experiments:

Citations per year

20082012201620202024051015202530
Abstract: (arXiv)
We use lattice QCD simulations, with MILC configurations and HISQ cc-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 mc(3GeV)=0.984(16)m_c(3 \mathrm{GeV})=0.984 (16) GeV, or, equivalently, mc(mc)=1.266(14)m_c(m_c)=1.266 (14) GeV. This agrees well with results from continuum analyses of the vector correlator using experimental data for e+ee^+e^- 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