Charm and bottom quark masses from perturbative QCD

May, 2006
4 pages
Published in:
  • Phys.Rev.D 74 (2006) 074006
e-Print:

Citations per year

2006201120162021202402468101214
Abstract:
Using a new result for the first moment of the hadronic production cross section at order O(αs3){\cal O}(\alpha_s^3), and new data on the J/ψJ/\psi and ψ\psi' resonances for the charm quark, we determine the \msb masses of the charm and bottom quarks to be mˉc(mˉc)=1.295±0.015\bar{m}_c(\bar{m}_c) = 1.295 \pm 0.015 GeV and mˉb(mˉb)=4.205±0.058\bar{m}_b(\bar{m}_b) = 4.205 \pm 0.058 GeV. We assume that the continuum contribution to the sum rules is adequately described by pQCD. While we observe a large reduction of the perturbative error, the shifts induced by the theoretical input are very small. The main change in the central value of mcm_c is related to the experimental data. On the other hand, the value of mbm_b is not changed by our calculation to the assumed precision.
  • 14.65.Fy
  • 14.65.Dw
  • 12.38.Bx
  • charm
  • bottom
  • quark: mass
  • quantum chromodynamics
  • perturbation theory: higher-order
  • electron positron: annihilation
  • hadron: electroproduction