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Deeply virtual Comp...
Deeply virtual Compton scattering and its beam charge asymmetry in e(+/-)p collisions at HERA
- Article/chapterEnglish2009
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LIBRIS-ID:oai:lup.lub.lu.se:b4142fd4-63bb-4d81-864b-e11ff7a58133
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https://lup.lub.lu.se/record/1517957URI
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https://doi.org/10.1016/j.physletb.2009.10.035DOI
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Language:English
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Summary in:English
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A measurement of elastic deeply virtual Compton scattering gamma*p --> gamma p using e(+) p and e(-) p collision data recorded with the HI detector at HERA is presented. The analysed data sample corresponds to an integrated luminosity of 306 pb(-1), almost equally shared between both beam charges. The cross section is measured as a function of the virtuality Q(2) of the exchanged photon and the centre-of-mass energy W of the gamma*p system in the kinematic domain 6.5 < Q(2) < 80 GeV2, 30 < W < 140 GeV and |t| < 1 GeV2, where t denotes the squared momentum transfer at the proton vertex. The cross section is determined differentially in t for different Q(2) and W values and exponential t-slope parameters are derived. Using e(+) p and e(-) p data samples, a beam charge asymmetry is extracted for the first time in the low Biorken x kinematic domain. The observed asymmetry is attributed to the interference between Bethe-Heitler and deeply virtual Compton scattering processes. Experimental results are discussed in the context of two different models, one based on generalised parton distributions and one based on the dipole approach. (C) 2009 Elsevier B.V. All rights reserved.
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Martin, M. Aldaya
(author)
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Alexa, C.
(author)
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Alimujiang, K.
(author)
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Andreev, V.
(author)
-
Antunovic, B.
(author)
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Backovic, S.
(author)
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Baghdasaryan, A.
(author)
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Barrelet, E.
(author)
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Bartel, W.
(author)
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Begzsuren, K.
(author)
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Belousov, A.
(author)
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Bizot, J. C.
(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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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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Avila, K. B. Cantun
(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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Deak, M.
(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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Delvax, J.
(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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Dossanov, A.
(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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Eliseev, A.
(author)
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Elsen, E.
(author)
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Falkiewicz, A.
(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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Fischer, D. -J.
(author)
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Fleischer, M.
(author)
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Fomenko, A.
(author)
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Gabathuler, E.
(author)
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Gayler, J.
(author)
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Ghazaryan, 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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Gogitidze, N.
(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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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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Helebrant, C.
(author)
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Henderson, R. C. W.
(author)
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Hennekemper, E.
(author)
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Henschel, H.
(author)
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Herbst, M.
(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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Hreus, T.
(author)
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Jacquet, M.
(author)
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Janssen, M. E.
(author)
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Janssen, X.
(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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Jung, A. W.
(author)
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Jung, H.
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Kapichine, M.
(author)
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Katzy, J.
(author)
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Kenyon, I. R.
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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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Kluge, T.
(author)
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Knutsson, A.
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Kogler, R.
(author)
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Kostka, P.
(author)
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Kraemer, M.
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Krastev, K.
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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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Kutak, 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.
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Leibenguth, G.
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Lendermann, V.
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Levonian, S.
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Li, G.
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Lipka, K.
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Liptaj, A.
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List, B.
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List, J.
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Loktionova, N.
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Lopez-Fernandez, R.
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Lubimov, V.
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Makankine, A.
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Malinovski, E.
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Marage, P.
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Marti, Ll.
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Martyn, H. -U.
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Maxfield, S. J.
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Mehta, A.
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Meyer, A. B.
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Meyer, H.
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Meyer, H.
(author)
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Meyer, J.
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Michels, V.
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Mikocki, S.
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Milcewicz-Mika, I.
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Moreau, F.
(author)
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Morozov, A.
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Morris, J. V.
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Mozer, M. U.
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Mudrinic, M.
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Mueller, K.
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Murin, P.
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Naumann, Th.
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Newman, P. R.
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Niebuhr, C.
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Nikiforov, A.
(author)
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Nikitin, D.
(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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Olivier, B.
(author)
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Olsson, J. E.
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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
(author)
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Ozerov, D.
(author)
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Palichik, V.
(author)
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Panagoulias, I.
(author)
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Pandurovic, M.
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Papadopoulou, Th.
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Pascaud, C.
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Patel, G. D.
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Pejchal, O.
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Perez, E.
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Petrukhin, A.
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Picuric, I.
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Piec, S.
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Pitzl, D.
(author)
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Placakyte, R.
(author)
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Pokorny, B.
(author)
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Polifka, R.
(author)
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Povh, B.
(author)
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Radescu, V.
(author)
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Rahmat, A. J.
(author)
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Raicevic, N.
(author)
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Raspiareza, A.
(author)
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Ravdandorj, T.
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Reimer, P.
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Rizvi, E.
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Robmann, P.
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Roland, B.
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Roosen, R.
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Rostovtsev, A.
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Rotaru, M.
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Ruiz Tabasco, J. E.
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Rurikova, Z.
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Rusakov, S.
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Salek, D.
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Sankey, D. P. C.
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Sauter, M.
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Sauvan, E.
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Schmitt, S.
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Schoening, A.
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Seflow, F.
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(author)
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Soloviev, Y.
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Sopicki, P.
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South, D.
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Staykova, Z.
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Steder, M.
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Stella, B.
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Sunar, D.
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Tchoulakov, V.
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Tran, T. H.
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von den Driesch, M.
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Wuensch, E.
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Zalesak, J.
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Zhokin, A.
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Zimmermann, T.
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Zohrabyan, H.
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Zomer, F.
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Zus, R.
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In:Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics: Elsevier BV681:5, s. 391-3990370-2693
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