Some tests for the helicity structure of the pomeron in $ep$ collisions

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dc.creatorArens, T.
dc.creatorDiehl, M.
dc.creatorNachtmann, O.
dc.creatorLandshoff, P. V.
dc.date1996-05-22
dc.date.accessioned2026-07-07T03:59:18Z
dc.date.available2026-07-07T03:59:18Z
dc.descriptionWe discuss the reaction $e p \to e \tilde{p} X$ in the one-photon exchange approximation, where it is in essence the reaction $γ^{*} p \to \tilde{p} X$. A large rapidity gap is required between the particle or particles of the proton remnant $\tilde{p}$ and those of $X$. We define a suitable azimuthal angle $φ$ between a leptonic and a hadronic plane. The dependence of the cross section on $φ$ is given explicitly and can be used to extract cross sections and interference terms for the reaction $γ^{*} p \to \tilde{p} X$ corresponding to the various helicities of the virtual photon $γ^{*}$. The interference terms can be used to test models for the large rapidity gap events in a sensitive way. We discuss in detail models with factorizing Pomeron exchange and in particular the Donnachie-Landshoff Pomeron model. We make some remarks on soft colour exchange models and on possible effects of QCD background vacuum fields. We conclude with a suggestion to look for Odderon exchange in exclusive deep inelastic high energy reactions like $γ^{*} p \to \tilde{p} π^{0}$ and $γ^{*} p \to \tilde{p} η$.
dc.description45 pages (LaTeX), 7 figures as separate postscript files
dc.identifierhttps://arxiv.org/abs/hep-ph/9605376
dc.identifierhttp://arxiv.org/abs/hep-ph/9605376
dc.identifierZ.Phys. C74 (1997) 651-669
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/46166
dc.subjectHigh Energy Physics - Phenomenology
dc.titleSome tests for the helicity structure of the pomeron in $ep$ collisions
dc.typetext

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