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

Abstract

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.

4 pages, 2 PDF figures

References in corpus (2)

• A unified description of diffractive deep inelastic scattering with saturation
• Inclusive Measurement of Diffractive Deep-Inelastic Scattering at HERA

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