Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-09-03
Nucl.Phys.Proc.Suppl. 74 (1999) 380-383
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, 2 figures, LateX with espcrc2 and epsfig
Scientific paper
10.1016/S0920-5632(99)00201-7
By performing an analysis in moment space using high statistics DIS world data, we extract the values of both the QCD parameter $\Lambda^{(4)}_{\bar{MS}}$ up to NLO and of the power corrections to the proton structure function, $F_2$. At variance with previous analyses, the use of moments allows us to extend the kinematical range to larger values of $x$, where we find that power corrections are quantitatively more important. Our results are consistent with the $n$ dependence predicted by IR renormalon calculations. We discuss preliminary results on nuclear targets with the intent of illustrating a possible strategy to disentangle power corrections ascribed to IR renormalons from the ones generated dynamically e.g. from rescattering in the final state. The latter appear to be modified in nuclear targets.
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