An Observation on F2 at Low x
Abstract
A simple parametrisation of H1 and ZEUS data at HERA is given for the ranges in x and Q2 of 10-4 - 5.10-2 and 5 - 250 GeV2, respectively. This empirical expression is based on a strikingly similar dependence of the average charged particle multiplicity <n> on the centre of mass system energy sqrts in e+e- collisions on the one hand, and the x dependence of the proton structure function F2 as measured at small x on the other hand. To the best of our knowledge, this similarity has not been noted before.
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