Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A global analysis of inclusive diffractive cross sections at HERA   We describe the most recent data on the diffractive structure functions from
the H1 and ZEUS Collaborations at HERA using four models. First, a Pomeron
Structure Function (PSF) model, in which the Pomeron is considered as an object
with parton distribution functions. Then, the Bartels Ellis Kowalski Wusthoff
(BEKW) approach is discussed, assuming the simplest perturbative description of
the Pomeron using a two-gluon ladder. A third approach, the Bialas Peschanski
(BP) model, based on the dipole formalism is then described. Finally, we
discuss the Golec-Biernat-W\"usthoff (GBW) saturation model which takes into
account saturation effects. The best description of all avaible measurements
can be achieved with either the PSF based model or the BEKW approach. In
particular, the BEKW prediction allows to include the highest $\beta$
measurements, which are dominated by higher twists effects and provide an
efficient and compact parametrisation of the diffractive cross section. The two
other models also give a good description of cross section measurements at
small $x$ with a small number of parameters. The comparison of all predictions
allows us to identify interesting differences in the behaviour of the effective
pomeron intercept and in the shape of the longitudinal component of the
diffractive structure functions. In this last part, we present some features
that can be discriminated by new experimental measurements, completing the HERA
program.

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The categories of this paper are: cs
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The categories of this paper are: chem-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-alg
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The categories of this paper are: bayes-an
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The categories of this paper are: eess
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The categories of this paper are: stat
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ex
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The categories of this paper are: q-fin
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The categories of this paper are: alg-geom
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The categories of this paper are: chao-dyn
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The categories of this paper are: adap-org
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The categories of this paper are: funct-an