Manifestation of Sea Quark Effects in the Strong Coupling Constant in Lattice QCD

Abstract

We demonstrate that sea quark effects of a magnitude expected from renormalization group considerations are clearly visible in the strong coupling constant measured in current full QCD simulations. Building on this result an estimate of ${\alpha }_{\overline{MS}}^{(5)}(M_Z)$ is made employing the charmonium $1S-1P$ mass splitting calculated on full QCD configurations generated with two flavors of dynamical Kogut-Susskind quarks to fix the scale.

10 pages + 2 figures(postscript files), Latex files, compressed, uuencode tar file, UTHEP-280

References in corpus (9)

• On the Viability of Lattice Perturbation Theory
• Running Coupling and the Lambda-Parameter from SU(3) Lattice Simulations
• The Running Coupling from SU(3) Lattice Gauge Theory
• Quenched Light Hadron Mass Spectrum and Decay Constants: the effects of $O(a)$-Improvement at $\beta =6.2$
• Heavy Dynamical Fermions in Lattice QCD
• Finite-size and quark mass effects on the QCD spectrum with two flavors
• Contamination of Excited States in Quenched QCD Hadron Propagators
• Precision ${\rm Y}$ Spectroscopy and Fundamental Parameters From NRQCD
• High statistics calculations of quenched QCD spectrum using various quark sources

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• Further Precise Determinations of ${\alpha }_s$ from Lattice QCD
• QCD Running Couplings and Effective Charges
• Determination of ${\Lambda }_{\overline{MS}}$ from quenched and $N_f=2$ dynamical QCD
• Precision Charmonium Spectroscopy From Lattice QCD
• Recent results from lattice calculations
• Alpha_S from Upsilon Spectroscopy with Dynamical Wilson Fermions
• Lattice Investigations of the Running Coupling
• From Spectroscopy to the Strong Coupling Constant with Heavy Wilson Quarks
• LATTICE QCD AND THE STANDARD MODEL