Refinements in electroweak contributions to the muon anomalous magnetic moment

Dec, 2002
34 pages
Published in:
  • Phys.Rev.D 67 (2003) 073006,
  • Phys.Rev.D 73 (2006) 119901 (erratum)
e-Print:
Report number:
  • ALBERTA-THY-18-02,
  • BNL-HET-02-25,
  • TPI-MINN-02-46,
  • UMN-TH-2119-02

Citations per year

20012007201320192025020406080100120
Abstract: (arXiv)
Effects of strong interactions on the two loop electroweak radiative corrections to the muon anomalous magnetic moment, aμ=(gμ2)/2a_\mu=(g_\mu-2)/2, are examined. Short-distance logs are shown to be unaffected. Computation of long-distance contributions is improved by use of an effective field theory approach that preserves the chiral properties of QCD and accounts for constraints from the operator product expansion. Small, previously neglected, two loop contributions, suppressed by a 14sin2θW1-4\sin^2\theta_W factor, are computed and the complete three loop leading short-distance logs are reevaluated. These refinements lead to a reduction in uncertainties and a slight shift in the total electroweak contribution to aμEW=154(1)(2)×1011a_\mu^{\rm EW} = 154(1)(2)\times 10^{-11} where the first error corresponds to hadronic uncertainties and the second is primarily due to the allowed Higgs mass range.
Note:
  • Revtex, 35 pages, 9 figures. Minor corrections in a few equations, note on comparison of OPE analyses is added
  • 13.40.Em
  • 14.60.Ef
  • muon: magnetic moment
  • electroweak interaction: radiative correction
  • Feynman graph: higher-order
  • correction: hadronic
  • quark
  • vertex function: (Z0 2photon)
  • quantum chromodynamics
  • operator product expansion