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Tests of QCD factor...
Tests of QCD factorisation in the diffractive production of dijets in deep-inelastic scattering and photoproduction at HERA
- Article/chapterEnglish2007
Publisher, publication year, extent ...
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2007-06-19
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Springer Science and Business Media LLC,2007
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LIBRIS-ID:oai:lup.lub.lu.se:eec6f0e1-4b9a-4c12-a992-4b374a0e6712
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https://lup.lub.lu.se/record/647180URI
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https://doi.org/10.1140/epjc/s10052-007-0325-4DOI
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Language:English
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Summary in:English
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Subject category:art swepub-publicationtype
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Subject category:ref swepub-contenttype
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Measurements are presented of differential dijet cross sections in diffractive photoproduction (Q(2) < 0.01 GeV2) and deep-inelastic scattering processes (DIS, 4 < Q2 < 80 GeV2). The event topology is given by ep -> eXY, in which the system X, containing at least two jets, is separated from a leading low-mass baryonic system Y by a large rapidity gap. The dijet cross sections are compared with NLO QCD predictions based on diffractive parton densities previously obtained from a QCD analysis of inclusive diffractive DIS cross sections by H1. In DIS, the dijet data are well described, supporting the validity of QCD factorisation. The diffractive DIS dijet data are more sensitive to the diffractive gluon density at high fractional parton momentum than the measurements of inclusive diffractive DIS. In photoproduction, the predicted dijet cross section has to be multiplied by a factor of approximately 0.5 for both direct and resolved photon interactions to describe the measurements. The ratio of measured dijet cross section to NLO prediction in photoproduction is a factor 0.5 +/- 0.1 smaller than the same ratio in DIS. This suppression is the first clear observation of QCD hard scattering factorisation breaking at HERA. The measurements are also compared to the two soft colour neutralisation models SCI and GAL. The SCI model describes diffractive dijet production in DIS but not in photoproduction. The GAL model fails in both kinematic regions.
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Andreev, V.
(author)
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Anthonis, T.
(author)
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Antunovic, B.
(author)
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Aplin, S.
(author)
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Asmone, A.
(author)
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Astvatsatourov, A.
(author)
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Babaev, A.
(author)
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Backovic, S.
(author)
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Baghdasaryan, A.
(author)
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Baranov, P.
(author)
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Barrelet, E.
(author)
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Bartel, W.
(author)
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Baudrand, S.
(author)
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Beckingham, M.
(author)
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Begzsuren, K.
(author)
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Behnke, O.
(author)
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Behrendt, O.
(author)
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Belousov, A.
(author)
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Berger, N.
(author)
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Bizot, J. C.
(author)
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Boenig, M.-O.
(author)
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Boudry, V.
(author)
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Bozovic-Jelisavcic, I.
(author)
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Bracinik, J.
(author)
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Brandt, G.
(author)
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Brinkmann, M.
(author)
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Brisson, V.
(author)
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Bruncko, D.
(author)
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Buesser, F. W.
(author)
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Bunyatyan, A.
(author)
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Buschhorn, G.
(author)
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Bystritskaya, L.
(author)
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Campbell, A. J.
(author)
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Cantun Avila, K. B.
(author)
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Cassol-Brunner, F.
(author)
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Cerny, K.
(author)
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Cerny, V.
(author)
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Chekelian, V.
(author)
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Cholewa, A.
(author)
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Contreras, J. G.
(author)
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Coughlan, J. A.
(author)
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Cozzika, G.
(author)
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Cvach, J.
(author)
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Dainton, J. B.
(author)
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Daum, K.
(author)
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de Boer, Y.
(author)
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Delcourt, B.
(author)
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Del Degan, M.
(author)
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De Roeck, A.
(author)
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De Wolf, E. A.
(author)
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Diaconu, C.
(author)
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Dodonov, V.
(author)
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Dubak, A.
(author)
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Eckerlin, G.
(author)
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Efremenko, V.
(author)
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Egli, S.
(author)
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Eichler, R.
(author)
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Eisele, F.
(author)
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Eliseev, A.
(author)
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Elsen, E.
(author)
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Essenov, S.
(author)
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Falkewicz, A.
(author)
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Faulkner, P. J. W.
(author)
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Favart, L.
(author)
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Fedotov, A.
(author)
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Felst, R.
(author)
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Feltesse, J.
(author)
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Ferencei, J.
(author)
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Finke, L.
(author)
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Fleischer, M.
(author)
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Flucke, G.
(author)
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Fomenko, A.
(author)
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Franke, G.
(author)
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Frisson, T.
(author)
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Gabathuler, E.
(author)
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Garutti, E.
(author)
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Gayler, J.
(author)
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Ghazaryan, S.
(author)
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Ginzburgskaya, S.
(author)
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Glazov, A.
(author)
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Glushkov, I.
(author)
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Goerlich, L.
(author)
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Goettlich, M.
(author)
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Gogitidze, N.
(author)
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Gorbounov, S.
(author)
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Gouzevitch, M.
(author)
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Grab, C.
(author)
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Greenshaw, T.
(author)
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Gregori, M.
(author)
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Grell, B. R.
(author)
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Grindhammer, G.
(author)
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Habib, S.
(author)
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Haidt, D.
(author)
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Hansson, MagnusLund University,Lunds universitet,Partikel- och kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Particle and nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)hep-mha
(author)
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Heinzelmann, G.
(author)
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Helebrant, C.
(author)
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Henderson, R. C. W.
(author)
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Henschel, H.
(author)
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Herrera, G.
(author)
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Hildebrandt, M.
(author)
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Hiller, K. H.
(author)
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Hoffmann, D.
(author)
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Horisberger, R.
(author)
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Hovhannisyan, A.
(author)
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Hreus, T.
(author)
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Hussain, S.
(author)
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Jacquet, M.
(author)
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Janssen, X.
(author)
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Jemanov, V.
(author)
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Jönsson, LeifLund University,Lunds universitet,Partikel- och kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Particle and nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)quar-ljo
(author)
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Johnson, D. P.
(author)
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Jung, A. W.
(author)
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Jung, H.
(author)
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Kapichine, M.
(author)
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Katzy, J.
(author)
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Kenyon, I. R.
(author)
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Kiesling, C.
(author)
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Klein, M.
(author)
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Kleinwort, C.
(author)
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Klimkovich, T.
(author)
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Kluge, T.
(author)
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Knies, G.
(author)
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Knutsson, AlbertLund University,Lunds universitet,Partikel- och kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Particle and nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)quar-akn
(author)
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Korbel, V.
(author)
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Kostka, P.
(author)
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Kraemer, M.
(author)
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Krastev, K.
(author)
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Kretzschmar, J.
(author)
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Kropivnitskaya, A.
(author)
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Krueger, K.
(author)
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Landon, M. P. J.
(author)
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Lange, W.
(author)
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Lastovicka-Medin, G.
(author)
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Laycock, P.
(author)
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Lebedev, A.
(author)
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Leibenguth, G.
(author)
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Lendermann, V.
(author)
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Levonian, S.
(author)
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Lindfeld, L.
(author)
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Lipka, K.
(author)
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Liptaj, A.
(author)
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List, B.
(author)
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List, J.
(author)
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Loktionova, N.
(author)
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Lopez-Fernandez, R.
(author)
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Lubimov, V.
(author)
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Lucaci-Timoce, A.-I.
(author)
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Lueders, H.
(author)
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Lytkin, L.
(author)
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Makankine, A.
(author)
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Malinovski, E.
(author)
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Marage, P.
(author)
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Marti, L.
(author)
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Martisikova, M.
(author)
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Martyn, H.-U.
(author)
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Maxfield, S. J.
(author)
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Mehta, A.
(author)
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Meier, K.
(author)
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Meyer, A. B.
(author)
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Meyer, H.
(author)
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Meyer, J.
(author)
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Michels, V.
(author)
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Mikocki, S.
(author)
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Milcewicz-Mika, I.
(author)
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Mladenov, D.
(author)
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Mohamed, A.
(author)
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Moreau, F.
(author)
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Morozov, A.
(author)
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Morris, J. V.
(author)
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Mozer, M. U.
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Mueller, K.
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Murin, P.
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Nankov, K.
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Naroska, B.
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Naumann, T.
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Newman, P. R.
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Niebuhr, C.
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Nikiforov, A.
(author)
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Nowak, G.
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Nowak, K.
(author)
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Nozicka, M.
(author)
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Oganezov, R.
(author)
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Olivier, B.
(author)
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Olsson, J. E.
(author)
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Osman, SakarLund University,Lunds universitet,Partikel- och kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Particle and nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)hep-sos
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Ozerov, D.
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Palichik, V.
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Panagoulias, I.
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Pandurovic, M.
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Papadopoulou, T.
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Pascaud, C.
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Patel, G. D.
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Peng, H.
(author)
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Perez, E.
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Perez-Astudillo, D.
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Perieanu, A.
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Petrukhin, A.
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Picuric, I.
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Piec, S.
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Pitzl, D.
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Placakyte, R.
(author)
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Povh, B.
(author)
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Prideaux, P.
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Rahmat, A. J.
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Raicevic, N.
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Reimer, P.
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Rimmer, A.
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Risler, C.
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Rizvi, E.
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Robmann, P.
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Roosen, R.
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Rostovtsev, A.
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Rurikova, Z.
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Rusakov, S.
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Sankey, D. P. C.
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Schoeffel, L.
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Schoening, A.
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Schultz-Coulon, H.-C.
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Sefkow, F.
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Shaw-West, R. N.
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Sheviakov, I.
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Sloan, T.
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Aktas, A.
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Andreev, V.
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Anthonis, T.
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Antunovic, B.
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Aplin, S.
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Asmone, A.
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Astvatsatourov, ...
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Babaev, A.
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Backovic, S.
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Baghdasaryan, A.
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Baranov, P.
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Bartel, W.
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Baudrand, S.
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Beckingham, M.
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Begzsuren, K.
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Behnke, O.
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Behrendt, O.
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Belousov, A.
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Cassol-Brunner, ...
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Cerny, K.
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Cerny, V.
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Cholewa, A.
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Contreras, J. G.
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Dainton, J. B.
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Daum, K.
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de Boer, Y.
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Delcourt, B.
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Del Degan, M.
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De Roeck, A.
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De Wolf, E. A.
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Diaconu, C.
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Dodonov, V.
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Dubak, A.
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Eckerlin, G.
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Efremenko, V.
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Egli, S.
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Eichler, R.
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Eisele, F.
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Eliseev, A.
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Elsen, E.
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Essenov, S.
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Falkewicz, A.
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Favart, L.
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Felst, R.
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Feltesse, J.
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Ferencei, J.
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Finke, L.
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Fleischer, M.
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Flucke, G.
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Fomenko, A.
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Franke, G.
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Frisson, T.
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Gabathuler, E.
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Garutti, E.
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Gayler, J.
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Ghazaryan, S.
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Ginzburgskaya, S ...
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Glazov, A.
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Glushkov, I.
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Goerlich, L.
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Gogitidze, N.
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Gorbounov, S.
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Gouzevitch, M.
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Grab, C.
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Greenshaw, T.
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Gregori, M.
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Grell, B. R.
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Grindhammer, G.
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Habib, S.
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Haidt, D.
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Hansson, Magnus
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Heinzelmann, G.
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Helebrant, C.
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Henschel, H.
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Herrera, G.
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Hildebrandt, M.
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Horisberger, R.
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Hreus, T.
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Hussain, S.
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Jacquet, M.
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Janssen, X.
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Jemanov, V.
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Jönsson, Leif
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Jung, A. W.
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Robmann, P.
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