Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-07-31
Phys.Lett. B459 (1999) 599-606
Physics
High Energy Physics
High Energy Physics - Phenomenology
15 pages LaTeX + 6 figures; typos corrected, added reference, to appear in Phys. Lett. B
Scientific paper
10.1016/S0370-2693(99)00698-X
We present a new method to solve in a semianalytical way the Dokshitzer-Gribov-Lipatov-Altarelli-Parisi evolution equations at NLO order in the x-space. The method allows to construct an evolution operator expressed in form of a rapidly convergent series of matrices, depending only on the splitting functions. This operator, acting on a generic initial distribution, provides a very accurate solution in a short computer time (only a few hundredth of second). As an example, we apply the method, useful to solve a wide class of systems of integrodifferential equations, to the polarized parton distributions.
Santorelli Pietro
Scrimieri Egidio
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