Evidence of strong higher twist effects in diffractive DIS at HERA at moderate Q2

Details Evidence of strong higher twist effects in diffractive DIS at HERA at moderate Q2 Evidence of strong higher twist effects in diffractive DIS at HERA at moderate Q2

2012-03-25

arxiv.org/abs/1203.5461v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 2 PDF figures

Scientific paper

We study a twist decomposition of diffractive structure functions in the diffractive deep inelastic scattering (DDIS) at HERA. At low Q2 and at large energy the data exhibit a strong excess, up to about 100%, above the twist 2 NLO DGLAP description. The excess in consistent with higher twist effects. It is found, that complementing the DGLAP fit by twist 4 and 6 components of the GBW saturation model leads to a good description of data at low Q2. We conclude that the DDIS at HERA provides the first, strong evidence of higher twist effects in DIS.

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