Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-04-30
Eur.Phys.J. C36 (2004) 49-56
Physics
High Energy Physics
High Energy Physics - Phenomenology
To be published in Eur.Phys.J.C, EPJC040401
Scientific paper
10.1140/epjc/s2004-01875-4
We perform fits of $\Lambda_{\rm QCD}$ and the gluon fragmentation function $D(x,Q)$ at initial scale $Q_0 \gg\Lambda_{\rm QCD}$ to charged light hadron momentum spectra data by evolving in the Modified Leading Logarithm Approximation. Without additional assumptions, we achieve a good description of the available data for $\xi=\ln(1/x)$ up to and around the Gaussian peak, and values of $\Lambda_{\rm QCD}$ acceptably close to those in the literature. In particular, we find that this procedure describes the position of the peak, and, in contrast to the Limiting Spectrum, also the normalization.
Albino Simon
Kniehl Bernd A.
Kramer Georgiana
Ochs William
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