An Improved Determination of $α_{S}$ From Neutrino-Nucleon Scattering

Paper

Abstract

We present an improved determination of the proton structure functions

and

from the CCFR

-Fe deep inelastic scattering (DIS) experiment. Comparisons to high-statistics charged-lepton scattering results for

from the NMC, E665, SLAC, and BCDMS experiments, after correcting for quark-charge and heavy-target effects, indicate good agreement for

but some discrepancy at lower x. The

evolution of the structure functions yields the quantum chromodynamics (QCD) scale parameter

(exp.) MeV. This corresponds to a value of the strong coupling constant at the scale of mass of the Z-boson of

and is one of the most precise measurements of this quantity.