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arXiv · hep-ex/9701017

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

CCFR Collaboration·W. Seligman
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Abstract

We present an improved determination of the proton structure functions $F_{2}$ and $xF_{3}$ from the CCFR $ν$-Fe deep inelastic scattering (DIS) experiment. Comparisons to high-statistics charged-lepton scattering results for $F_{2}$ from the NMC, E665, SLAC, and BCDMS experiments, after correcting for quark-charge and heavy-target effects, indicate good agreement for $x>0.1$ but some discrepancy at lower x. The $Q^{2}$ evolution of the structure functions yields the quantum chromodynamics (QCD) scale parameter $Λ_{\bar{MS}}^{NLO,(4)}=337 \pm 28$(exp.) MeV. This corresponds to a value of the strong coupling constant at the scale of mass of the Z-boson of $α_{S}(M_{Z}^{2})=0.119 \pm 0.002 (exp.) \pm 0.004 (theory)$ and is one of the most precise measurements of this quantity.

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CCFR Collaboration, W. Seligman. 1997-07-01. An Improved Determination of $α_{S}$ From Neutrino-Nucleon Scattering. https://doi.org/10.1103/physrevlett.79.1213

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