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Antunovic, B.; Babaev, A.; Backovic, S.; Bartel, W.; Behrendt, O.; Belousov, A.; Berger, N.; Boudry, V.; Bruncko, D.; Büsser, F.W.; Bystritskaya, L.; Chekelian, V.; Contreras, J.G.; Coppens, Y.R.; Cox, B.E.; Cozzika, G.; De Wolf, E.A.; Diaconu, C.; Dubak, A.; Eichler, R.; Essenov, S.; Fedotov, A.; Fleischer, M.; Garutti, E.; Gayler, J.; Glazov, A.; Glushkov, I.; Goerlich, L.; Greenshaw, T.; Grell, B.R.; Grindhammer, G.; Haidt, D.; Heinzelmann, G.; Henderson, R.C.W.; Hussain, S.; Ibbotson, M.; Jemanov, V.; Jönsson, L.; Johnson, C.L.; Kapichine, M.; Klein, M.; Knies, G.; Knutsson, A.; Kostka, P.; Kretzschmar, J.; Lebedev, A.; Leibenguth, G.; Levonian, S.; List, B.; Lobodzinska, E.; Loktionova, N.; Lopez-Fernandez, R.; Lytkin, L.; Malinovski, E.; Marage, P.; Marshall, R.; Martyn, H.-U.; Mehta, A.; Meier, K.; Meyer, J.; Michels, V.; Mikocki, S.; Milstead, D.; Mladenov, D.; Moreau, F.; Morozov, A.; Mozer, M.U.; Müller, K.; Naroska, B.; Naumann, T.; Nikiforov, A.; Nowak, K.; Nozicka, M.; Olivier, B.; Olsson, J.E.; Osman, S.; Ozerov, D.; Papadopoulou, T.; Patel, G.D.; Peng, H.; Portheault, B.; Prideaux, P.; Reimer, P.; Rizvi, E.; Sauter, M.; Schöning, A.; Smirnov, P.; Straumann, U.; Tchoulakov, V.; Thompson, P.D.; Toll, T.; Tsurin, I.; Veelken, C.; Wegener, D.; Werner, C.; Xella, S.; Yeganov, V.; Žáček, J.; Zálešák, J.; Zhokin, A.
The European physical journal. C, Particles and fields, 12/2006, Letnik: 48, Številka: 3Journal Article
The cross section for the diffractive deep-inelastic scattering process ep→eXp is measured, with the leading final state proton detected in the H1 Forward Proton Spectrometer. The data analysed cover the range xIP<0.1 in fractional proton longitudinal momentum loss, 0.08<|t|<0.5 GeV-2 in squared four-momentum transfer at the proton vertex, 2<Q2<50 GeV2 in photon virtuality and 0.004<β=x/xIP<1, where x is the Bjorken scaling variable. For , the differential cross section has a dependence of approximately dσ/dt∝e6t, independently of xIP, β and Q2 within uncertainties. The cross section is also measured triple differentially in xIP, β and Q2. The xIP dependence is interpreted in terms of an effective pomeron trajectory with intercept αIP(0)=1.114±0.018(stat.)±0.012(syst.)+0.040-0.020(model) and a sub-leading exchange. The data are in good agreement with an H1 measurement for which the event selection is based on a large gap in the rapidity distribution of the final state hadrons, after accounting for proton dissociation contributions in the latter. Within uncertainties, the dependence of the cross section on x and Q2 can thus be factorised from the dependences on all studied variables which characterise the proton vertex, for both the pomeron and the sub-leading exchange.
