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FD2at low Q2at HERA

Authors
Journal
Nuclear Physics B - Proceedings Supplements
0920-5632
Publisher
Elsevier
Publication Date
Volume
99
Identifiers
DOI: 10.1016/s0920-5632(01)01324-x
Disciplines
  • Physics

Abstract

Abstract The diffractive dissociation of photons with virtuality Q 2 < 0.7 GeV 2, γ* p → Xp, has been studied in ep interactions with the ZEUS detector at HERA. For a subsample of the data, the scattered proton was measured with the Leading Proton Spectrometer. The dependence of the diffractive cross section on the photon-proton centre-of-mass energy is used to determine the Pomeron intercept. The diffractive structure function F D 2 is measured and its dependence on Q 2 studied. At the small values of Q 2 considered, F D 2 exhibits a strong Q 2 dependence, a result at variance with what has been observed at higher Q 2 values.

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