/ Experiment-HEP arXiv:1008.1731


Measurement of Charm and Beauty Jets 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.) ; Barrelet, E. (Paris U., VI-VII) ; Bartel, W. (DESY) ; Begzsuren, K. (Ulan Bator, Inst. Phys. Tech.) ; Belousov, A. (Lebedev Inst.) ; 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.) ; Buschhorn, G. (Munich, Max Planck 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.) ; Cholewa, A. (DESY) ; Contreras, J.G. (Merida, IPN) ; Coughlan, J.A. (Rutherford) ; Cvach, J. (Prague, Inst. Phys.) ; Dainton, J.B. (Liverpool U.) ; Daum, K. (Wuppertal U.) ; Deak, M. (DESY) ; Delcourt, B. (Orsay, LAL) ; Delvax, J. (Antwerp U., WISINF) ; De Wolf, E.A. (Antwerp U., WISINF) ; Diaconu, C. (Marseille, CPPM) ; Dobre, M. (Tennessee U.) ; Dodonov, V. (Heidelberg, Max Planck Inst.) ; Dossanov, A. (Munich, Max Planck Inst.) ; Dubak, A. (Munich, Max Planck Inst.) ; Eckerlin, G. (DESY) ; Efremenko, V. (Moscow, ITEP) ; 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. (DESY) ; Ferencei, J. (Kosice, IEF) ; Fischer, D.J. (DESY) ; Fleischer, M. (DESY) ; Fomenko, A. (Lebedev Inst.) ; Gabathuler, E. (Liverpool U.) ; Gayler, J. (DESY) ; Ghazaryan, Samvel (DESY) ; Glazov, A. (DESY) ; Goerlich, L. (Cracow, INP) ; Gogitidze, N. (Lebedev Inst.) ; Gouzevitch, M. (DESY) ; 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, A.W. (Heidelberg U.) ; Jung, H. (Antwerp U., WISINF) ; Kapichine, M. (Dubna, JINR) ; Katzy, J. (DESY) ; Kenyon, I.R. (Birmingham U.) ; Kiesling, C. (Munich, Max Planck Inst.) ; Klein, M. (Liverpool U.) ; Kleinwort, C. (DESY) ; Kluge, T. (Liverpool U.) ; Knutsson, A. (DESY) ; Kogler, R. (Munich, Max Planck Inst.) ; Kostka, P. (DESY) ; Kraemer, M. (DESY) ; Kretzschmar, J. (Liverpool U.) ; Kropivnitskaya, A. (Moscow, ITEP) ; Kruger, K. (Heidelberg U.) ; Kutak, K. (DESY) ; 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. (Hamburg U., Inst. Exp. Phys. II) ; List, J. (DESY) ; Loktionova, N. (Lebedev Inst.) ; 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.) ; Meyer, J. (DESY) ; Mikocki, S. (Cracow, INP) ; Milcewicz-Mika, I. (Cracow, INP) ; Moreau, F. (Ecole Polytechnique) ; Morozov, A. (Dubna, JINR) ; Morris, J.V. (Rutherford) ; Mozer, M.U. (Antwerp U., WISINF) ; Mudrinic, M. (VINCA Inst. Nucl. Sci., Belgrade) ; Muller, K. (Zurich U.) ; Naumann, Th. (DESY) ; Newman, P.R. (Birmingham U.) ; Niebuhr, C. (DESY) ; Nikiforov, A. (DESY) ; Nikitin, D. (Dubna, JINR) ; Nowak, G. (Cracow, INP) ; Nowak, K. (DESY) ; Olsson, J.E. (DESY) ; Osman, S. (Lund U., Dept. Theor. Phys.) ; 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. (DESY) ; Pokorny, B. (Charles U.) ; Polifka, R. (Charles U.) ; Povh, B. (Heidelberg, Max Planck Inst.) ; Radescu, V. (Heidelberg U.) ; Rahmat, A.J. (Liverpool 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) ; Tabasco, J.E.Ruiz (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. (DSM, DAPNIA, Saclay) ; Schoning, A. (Heidelberg U.) ; Schultz-Coulon, H.C. (Heidelberg U.) ; Sefkow, F. (DESY) ; Shtarkov, L.N. (Lebedev Inst.) ; Shushkevich, S. (Munich, Max Planck Inst.) ; Sloan, T. (Lancaster U.) ; Smiljanic, I. (VINCA Inst. Nucl. Sci., Belgrade) ; Soloviev, Y. (Lebedev Inst.) ; Sopicki, P. (Cracow, INP) ; South, D. (Dortmund U.) ; Spaskov, V. (Dubna, JINR) ; Specka, A. (Ecole Polytechnique) ; Staykova, Z. (DESY) ; Steder, M. (DESY) ; Stella, B. (Frascati) ; Stoicea, G. (Bucharest, IFIN-HH) ; Straumann, U. (Zurich U.) ; Sunar, D. (Antwerp U., WISINF) ; Sykora, T. (Antwerp U., WISINF) ; Thompson, G. (Queen Mary, U. of London) ; Thompson, P.D. (Birmingham U.) ; Toll, T. (DESY) ; 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) ; Urban, K. (Heidelberg U.) ; Valkarova, A. (Charles U.) ; Vallee, C. (Marseille, CPPM) ; Van Mechelen, P. (Antwerp U., WISINF) ; Trevino, A.Vargas (DESY) ; Vazdik, Y. (Lebedev Inst.) ; von den Driesch, M. (DESY) ; 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: 33

Abstract: Measurements of cross sections for events with charm and beauty jets in deep inelastic scattering at HERA are presented. Events with jets of transverse energy E_T^jet > 6 GeV and pseudorapidity -1.0 < eta^jet < 1.5 in the laboratory frame are selected in the kinematic region of photon virtuality Q^2 > 6 GeV^2 and inelasticity variable 0.07 < y < 0.625. Measurements are also made requiring a jet in the Breit frame with E_T^*jet > 6 GeV. The data were collected with the H1 detector in the years 2006 and 2007 corresponding to an integrated luminosity of 189 pb^-1. The numbers of charm and beauty jets are determined using variables reconstructed using the H1 vertex detector with which the impact parameters of the tracks to the primary vertex and the position of secondary vertices are measured. The measurements are compared with QCD predictions and with previous measurements where heavy flavours are identified using muons.


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