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

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18 August 1997

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 79 (7) , 1213-1216
https://doi.org/10.1103/physrevlett.79.1213

Abstract

We present an improved determination of the proton structure functions

F_{2}

and

{xF}_{3}

from the Columbia-Chicago-Fermilab-Rochester Collaboration

ν - Fe

deep inelastic scattering experiment. Comparisons to corrected high-statistics charged-lepton scattering results for

F_{2}

from the NMC, E665, SLAC, and BCDMS experiments indicate good agreement for

x > 0.1

but some discrepancy at lower

x

. The

Q^{2}

evolution of both the

F_{2}

and

{xF}_{3}

structure functions yields 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 (expt) \pm 0.004 (theory)

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

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