Behavior of sigma(gamma p) at Large Coherence Lengths

Details Behavior of sigma(gamma p) at Large Coherence Lengths Behavior of sigma(gamma p) at Large Coherence Lengths

2008-02-06

arxiv.org/abs/0802.0769v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

34 pages, 20 figures

Scientific paper

Various parametrizations of sigma(gamma p) are tried out on the small-x fixed target and HERA data. A two-Pomeron type parametrization is found to give the best reproduction of the data. The data indicate that the value of lambda(eff) for parametrizations of the form sigma(gamma p)~l^lambda(eff) approaches a constant value at high Q^2. The extrapolated values of sigma(gamma p) to very long coherence lengths are found to cross in some parametrizations for l>10^7 fm, indicating the possibility that sigma(gamma p) becomes Q^2 independent at large values of the coherence length l.

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