EPJ

2022 Impact factor 4.4
EPJ C - Particles and Fields
Particles and Fields

Eur. Phys. J. C 10, 697-702
DOI 10.1007/s100529900133

Analysis of deep inelastic scattering with z-dependent scale

R.G. Roberts

Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, UK

Received: 27 April 1999 / Published online: 15 July 1999

Abstract
Evolution of the parton densities at NLO in $\alpha_S$using $\tilde W^2 = Q^2 (1-z)/z$ instead of the usual Q2 for the scale of the running coupling $\alpha_S$ is investigated. While this renormalisation scale change was originally proposed as the relevant one for $x \rightarrow 1$, we explore the consequences for all x with this choice. While it leads to no improvement to the description of DIS data, the nature of the gluon at low x, low Q2 is different, avoiding the need for a `valence-like' gluon.

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