/ Experiment-HEP arXiv:1111.4227

Measurement of the Azimuthal Correlation between the most Forward Jet and the Scattered Positron in Deep-Inelastic Scattering at HERA

Aaron, F.D. (Bucharest U.) ; Alexa, C. (Bucharest, IFIN-HH) ; Andreev, V. (Lebedev Inst.) ; Backovic, S. (Montenegro U.) ; Baghdasaryan, A. (Yerevan Phys. Inst.) ; Baghdasaryan, S. (Yerevan Phys. Inst.) ; Barrelet, E. (Paris U., VI-VII) ; Bartel, W. (DESY) ; Begzsuren, K. (Ulan Bator, Inst. Phys. Tech.) ; Belousov, A. (Lebedev Inst.) ; Belov, P. (DESY) ; Bizot, J.C. (Orsay, LAL) ; Boudry, V. (Ecole Polytechnique) ; Bozovic-Jelisavcic, I. (VINCA Inst. Nucl. Sci., Belgrade) ; Bracinik, J. (Birmingham U.) ; Brandt, G. (DESY) ; Brinkmann, M. (DESY) ; Brisson, V. (Orsay, LAL) ; Britzger, D. (DESY) ; Bruncko, D. (Kosice, IEF) ; Bunyatyan, A. (Yerevan Phys. Inst.) ; Bystritskaya, L. (Moscow, ITEP) ; Campbell, A.J. (DESY) ; Cantun Avila, K.B. (Merida, IPN) ; Ceccopieri, F. (Antwerp U., WISINF) ; Cerny, K. (Charles U.) ; Cerny, V. (Comenius U.) ; Chekelian, V. (Munich, Max Planck Inst.) ; Contreras, J.G. (Merida, IPN) ; Coughlan, J.A. (Rutherford) ; Cvach, J. (Prague, Inst. Phys.) ; Dainton, J.B. (Liverpool U.) ; Daum, K. (Wuppertal U.) ; Delcourt, B. (Orsay, LAL) ; Delvax, J. (Antwerp U., WISINF) ; De Wolf, E.A. (Antwerp U., WISINF) ; Diaconu, C. (Marseille, CPPM) ; Dobre, M. (Bucharest, IFIN-HH) ; Dodonov, V. (Heidelberg, Max Planck Inst.) ; Dossanov, A. (Munich, Max Planck Inst.) ; Dubak, A. (Munich, Max Planck Inst.) ; Eckerlin, G. (DESY) ; Egli, S. (PSI, Villigen) ; Eliseev, A. (Lebedev Inst.) ; Elsen, E. (DESY) ; Favart, L. (Antwerp U., WISINF) ; Fedotov, A. (Moscow, ITEP) ; Felst, R. (DESY) ; Feltesse, J. (DAPNIA, Saclay) ; Ferencei, J. (Kosice, IEF) ; Fischer, D.J. (DESY) ; Fleischer, M. (DESY) ; Fomenko, A. (Lebedev Inst.) ; Gabathuler, E. (Liverpool U.) ; Gayler, J. (DESY) ; Ghazaryan, S. (DESY) ; Glazov, A. (DESY) ; Goerlich, L. (Cracow, INP) ; Gogitidze, N. (Lebedev Inst.) ; Gouzevitch, M. (CERN) ; Grab, C. (Zurich, ETH) ; Grebenyuk, A. (DESY) ; Greenshaw, T. (Liverpool U.) ; Grell, B.R. (DESY) ; Grindhammer, G. (Munich, Max Planck Inst.) ; Habib, S. (DESY) ; Haidt, D. (DESY) ; Helebrant, C. (DESY) ; Henderson, R.C.W. (Lancaster U.) ; Hennekemper, E. (Heidelberg U.) ; Henschel, H. (DESY) ; Herbst, M. (Heidelberg U.) ; Herrera, G. (CINVESTAV, IPN) ; Hildebrandt, M. (PSI, Villigen) ; Hiller, K.H. (DESY) ; Hoffmann, D. (Marseille, CPPM) ; Horisberger, R. (PSI, Villigen) ; Hreus, T. (Kosice U.) ; Huber, F. (Heidelberg U.) ; Jacquet, M. (Orsay, LAL) ; Janssen, X. (Antwerp U., WISINF) ; Jonsson, L. (Lund U., Dept. Theor. Phys.) ; Jung, H. (CERN) ; Kapichine, M. (Dubna, JINR) ; Kenyon, I.R. (Birmingham U.) ; Kiesling, C. (Munich, Max Planck Inst.) ; Klein, M. (Liverpool U.) ; Kleinwort, C. (DESY) ; Kluge, T. (Liverpool U.) ; Kogler, R. (DESY) ; Kostka, P. (DESY) ; Kraemer, M. (DESY) ; Kretzschmar, J. (Liverpool U.) ; Kruger, K. (Heidelberg U.) ; Landon, M.P.J. (Queen Mary, U. of London) ; Lange, W. (DESY) ; Lastovicka-Medin, G. (Montenegro U.) ; Laycock, P. (Liverpool U.) ; Lebedev, A. (Lebedev Inst.) ; Lendermann, V. (Heidelberg U.) ; Levonian, S. (DESY) ; Lipka, K. (Tennessee U.) ; List, B. (DESY) ; List, J. (DESY) ; Lopez-Fernandez, R. (CINVESTAV, IPN) ; Lubimov, V. (Moscow, ITEP) ; Makankine, A. (Dubna, JINR) ; Malinovski, E. (Lebedev Inst.) ; Marage, P. (Antwerp U., WISINF) ; Martyn, H.U. (Aachen, Tech. Hochsch.) ; Maxfield, S.J. (Liverpool U.) ; Mehta, A. (Liverpool U.) ; Meyer, A.B. (DESY) ; Meyer, H. (Wuppertal U., Dept. Math.) ; Meyer, J. (DESY) ; Mikocki, S. (Cracow, INP) ; Milcewicz-Mika, I. (Cracow, INP) ; Moreau, F. (Ecole Polytechnique) ; Morozov, A. (Dubna, JINR) ; Morris, J.V. (Rutherford) ; Mudrinic, M. (VINCA Inst. Nucl. Sci., Belgrade) ; Muller, K. (Zurich U.) ; Naumann, Th. (DESY) ; Newman, P.R. (Birmingham U.) ; Niebuhr, C. (DESY) ; Nikitin, D. (Dubna, JINR) ; Nowak, G. (Cracow, INP) ; Nowak, K. (DESY) ; Olsson, J.E. (DESY) ; Ozerov, D. (Moscow, ITEP) ; Pahl, P. (DESY) ; Palichik, V. (Dubna, JINR) ; Panagoulias, I. (Natl. Tech. U., Athens) ; Pandurovic, M. (VINCA Inst. Nucl. Sci., Belgrade) ; Papadopoulou, Th. (Natl. Tech. U., Athens) ; Pascaud, C. (Orsay, LAL) ; Patel, G.D. (Liverpool U.) ; Perez, E. (CERN) ; Petrukhin, A. (DESY) ; Picuric, I. (Montenegro U.) ; Piec, S. (DESY) ; Pirumov, H. (Heidelberg U.) ; Pitzl, D. (DESY) ; Placakyte, R. (Hamburg U., Inst. Exp. Phys. II) ; Pokorny, B. (Charles U.) ; Polifka, R. (Toronto U.) ; Povh, B. (Heidelberg, Max Planck Inst.) ; Radescu, V. (Heidelberg U.) ; Raicevic, N. (Montenegro U.) ; Ravdandorj, T. (Ulan Bator, Inst. Phys. Tech.) ; Reimer, P. (Prague, Inst. Phys.) ; Rizvi, E. (Queen Mary, U. of London) ; Robmann, P. (Zurich U.) ; Roosen, R. (Antwerp U., WISINF) ; Rostovtsev, A. (Moscow, ITEP) ; Rotaru, M. (Bucharest, IFIN-HH) ; Ruiz Tabasco, J.E. (Merida, IPN) ; Rusakov, S. (Lebedev Inst.) ; Salek, D. (Charles U.) ; Sankey, D.P.C. (Rutherford) ; Sauter, M. (Heidelberg U.) ; Sauvan, E. (Marseille, CPPM) ; Schmitt, S. (DESY) ; Schoeffel, L. (DAPNIA, Saclay) ; Schoning, A. (Heidelberg U.) ; Schultz-Coulon, H.C. (Heidelberg U.) ; Sefkow, F. (DESY) ; Shtarkov, L.N. (Lebedev Inst.) ; Shushkevich, S. (DESY) ; Sloan, T. (Lancaster U.) ; Smiljanic, I. (VINCA Inst. Nucl. Sci., Belgrade) ; Soloviev, Y. (Lebedev Inst.) ; Sopicki, P. (Cracow, INP) ; South, D. (DESY) ; Spaskov, V. (Dubna, JINR) ; Specka, A. (Ecole Polytechnique) ; Staykova, Z. (Antwerp U., WISINF) ; Steder, M. (DESY) ; Stella, B. (INFN, Rome) ; Stoicea, G. (Bucharest, IFIN-HH) ; Straumann, U. (Zurich U.) ; Sykora, T. (Charles U.) ; Thompson, P.D. (Birmingham U.) ; Tran, T.H. (Orsay, LAL) ; Traynor, D. (Queen Mary, U. of London) ; Truol, P. (Zurich U.) ; Tsakov, I. (Sofiya, Inst. Nucl. Res.) ; Tseepeldorj, B. (Ulaanbaatar U.) ; Turnau, J. (Cracow, INP) ; Valkarova, A. (Charles U.) ; Vallee, C. (Marseille, CPPM) ; Van Mechelen, P. (Antwerp U., WISINF) ; Vazdik, Y. (Lebedev Inst.) ; Wegener, D. (Dortmund U.) ; Wunsch, E. (DESY) ; Zacek, J. (Charles U.) ; Zalesak, J. (Prague, Inst. Phys.) ; Zhang, Z. (Orsay, LAL) ; Zhokin, A. (Moscow, ITEP) ; Zohrabyan, H. (Yerevan Phys. Inst.) ; Zomer, F. (Orsay, LAL)

Pages: 22

Abstract: Deep-inelastic positron-proton scattering events at low photon virtuality Q^2 with a forward jet, produced at small angles with respect to the proton beam, are measured with the H1 detector at HERA. A subsample of events with an additional jet in the central region is also studied. For both samples differential cross sections and normalised distributions are measured as a function of the azimuthal angle difference, Delta phi, between the forward jet and the scattered positron. The sensitivity to QCD evolution mechanisms is tested by comparing the data to predictions of Monte Carlo generators based on different evolution approaches as well as to next-to-leading order calculations.

Web-Page: http://inspirehep.net/record/946655/files/arXiv:1111.4227.pdf; http://inspirehep.net/record/946655/files/d11-183f1.png; http://inspirehep.net/record/946655/files/d11-183f2.png; http://inspirehep.net/record/946655/files/d11-183f3.png; http://inspirehep.net/record/946655/files/d11-183f4.png; http://inspirehep.net/record/946655/files/d11-183f5.png; http://inspirehep.net/record/946655/files/d11-183f6.png; http://inspirehep.net/record/946655/files/d11-183f7.png

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