Phenomenology on the QCD dipole picture revisited
Institute of Electron Physics, National Academy of Sciences of Ukraine, Universitetska 21, UA-88016, Uzhgorod, Ukraine
2 Instituto de Física e Matemática, Universidade Federal de Pelotas, Caixa Postal 354, CEP 96010-090, Pelotas, RS, Brazil
3 High Energy Physics Phenomenology Group, GFPAE, IF-UFRGS, Caixa Postal 15051, CEP 91501-970, Porto Alegre, RS, Brazil
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We perform an adjustment to the most recent structure function data, considering the QCD dipole picture applied to the ep scattering. The structure function F 2 at small x and intermediate Q 2 can be described by the model containing an economical number of free parameters, which encodes the hard-pomeron physics. The structure function F L and the gluon distribution are predicted without further adjustments. The data description is remarkably good, however giving a rather low value for the fixed strong-coupling constant. This indicates that a resummed next-to-leading-level analysis should be done, which would bring it to suitable values.
© Società Italiana di Fisica and Springer-Verlag, 2004