/ hep-ex DESY-15-039


Combination of Measurements of Inclusive Deep Inelastic $e^{\pm}p$ Scattering Cross Sections and QCD Analysis of HERA Data


Abramowicz, H. (Tel Aviv U.) ; Abt, I. (Munich, Max Planck Inst.) ; Adamczyk, L. (AGH-UST, Cracow) ; Adamus, M. (NCBJ, Swierk) ; Andreev, V. (Lebedev Inst.) ; Antonelli, S. (INFN, Bologna) ; Antunovic, B. (Unlisted) ; Aushev, V. (Taras Shevchenko U.) ; Aushev, Y. (Kiev Polytechnic Inst.) ; Baghdasaryan, A. (Yerevan Phys. Inst.) ; Begzsuren, K. (Ulan Bator, Inst. Phys. Tech.) ; Behnke, O. (DESY) ; Behrendt Dubak, A. (Montenegro U.) ; Behrens, U. (DESY) ; Belousov, A. (Lebedev Inst.) ; Belov, P. (DESY) ; Bertolin, A. (INFN, Padua) ; Bloch, I. (DESY) ; Boos, E.G. (IPT, Kazakstan) ; Borras, K. (DESY) ; Boudry, V. (Ecole Polytechnique) ; Brandt, G. (Gottingen U.) ; Brisson, V. (Orsay) ; Britzger, D. (DESY) ; Brock, I. (Bonn U.) ; Brook, N.H. (University Coll. London) ; Brugnera, R. (INFN, Padua) ; Bruni, A. (INFN, Bologna) ; Buniatyan, A. (Birmingham U.) ; Bussey, P.J. (Glasgow U.) ; Bylinkin, A. (Moscow, MIPT) ; Bystritskaya, L. (Moscow, ITEP) ; Caldwell, A. (Munich, Max Planck Inst.) ; Campbell, A.J. (DESY) ; Cantun Avila, K.B. (Merida, IPN) ; Capua, M. (INFN, Cosenza) ; Catterall, C.D. (York U., Canada) ; Ceccopieri, F. (Antwerp U., WISINF) ; Cerny, K. (Charles U.) ; Chekelian, V. (Munich, Max Planck Inst.) ; Chwastowski, J. (Cracow, INP) ; Ciborowski, J. (Lodz U.) ; Ciesielski, R. (DESY) ; Contreras, J.G. (Merida, IPN) ; Cooper-Sarkar, A.M. (Oxford U.) ; Corradi, M. (INFN, Bologna) ; Corriveau, F. (McGill U.) ; Cvach, J. (Prague, Inst. Phys.) ; Dainton, J.B. (Liverpool U.) ; Daum, K. (Wuppertal U.) ; Dementiev, R.K. (Moscow State U.) ; Devenish, R.C.E. (Oxford U.) ; Diaconu, C. (Marseille, CPPM) ; Dobre, M. (Bucharest, IFIN-HH) ; Dodonov, V. (DESY) ; Dolinska, G. (DESY) ; Dusini, S. (INFN, Padua) ; Eckerlin, G. (DESY) ; Egli, S. (PSI, Villigen) ; Elsen, E. (DESY) ; Favart, L. (Antwerp U., WISINF) ; Fedotov, A. (Moscow, ITEP) ; Feltesse, J. (DAPNIA, Saclay) ; Ferencei, J. (Kosice, IEF) ; Figiel, J. (Cracow, INP) ; Fleischer, M. (DESY) ; Fomenko, A. (Lebedev Inst.) ; Foster, B. (DESY) ; Gabathuler, E. (Liverpool U.) ; Gach, G. (Birmingham U.) ; Gallo, E. (DESY) ; Garfagnini, A. (INFN, Padua) ; Gayler, J. (DESY) ; Geiser, A. (DESY) ; Ghazaryan, S. (DESY) ; Gizhko, A. (DESY) ; Gladilin, L.K. (Moscow State U.) ; Goerlich, L. (Cracow, INP) ; Gogitidze, N. (Lebedev Inst.) ; Golubkov, Yu. A. (Moscow State U.) ; Gouzevitch, M. (Lyon, IPN) ; Grab, C. (Zurich, ETH) ; Grebenyuk, A. (Antwerp U., WISINF) ; Grebenyuk, J. (DESY) ; Greenshaw, T. (Liverpool U.) ; Gregor, I. (DESY) ; Grindhammer, G. (Munich, Max Planck Inst.) ; Grzelak, G. (Warsaw U. of Tech.) ; Gueta, O. (Tel Aviv U.) ; Guzik, M. (AGH-UST, Cracow) ; Gwenlan, C. (Oxford U.) ; Haidt, D. (DESY) ; Hain, W. (DESY) ; Henderson, R.C.W. (Lancaster U.) ; Henkenjohann, P. (Bielefeld U.) ; Hladky, J. (Prague, Inst. Phys.) ; Hochman, D. (Weizmann Inst.) ; Hoffmann, D. (Marseille, CPPM) ; Hori, R. (KEK, Tsukuba) ; Horisberger, R. (PSI, Villigen) ; Hreus, T. (Antwerp U., WISINF) ; Huber, F. (Heidelberg U.) ; Ibrahim, Z.A. (Malaya U.) ; Iga, Y. (Tokyo Inst. Polytech.) ; Ishitsuka, M. (Tokyo Inst. Tech.) ; Iudin, A. (Kiev Polytechnic Inst.) ; Jacquet, M. (Orsay) ; Janssen, X. (Antwerp U., WISINF) ; Januschek, F. (DESY) ; Jomhari, N.Z. (Malaya U.) ; Jung, H. (Antwerp U., WISINF) ; Kadenko, I. (Taras Shevchenko U.) ; Kananov, S. (Tel Aviv U.) ; Kapichine, M. (Dubna, JINR) ; Karshon, U. (Weizmann Inst.) ; Kaur, M. (Panjab U.) ; Kaur, P. (Panjab U.) ; Kiesling, C. (Munich, Max Planck Inst.) ; Kisielewska, D. (AGH-UST, Cracow) ; Klanner, R. (Hamburg U., Inst. Exp. Phys. II) ; Klein, M. (Liverpool U.) ; Klein, U. (Liverpool U.) ; Kleinwort, C. (DESY) ; Kogler, R. (Hamburg U., Inst. Exp. Phys. II) ; Kondrashova, N. (DESY) ; Kononenko, O. (Taras Shevchenko U.) ; Korol, Ie. (DESY) ; Korzhavina, I.A. (Moscow State U.) ; Kostka, P. (Liverpool U.) ; Kotanski, A. (Jagiellonian U.) ; Kotz, U. (DESY) ; Kovalchuk, N. (Hamburg U., Inst. Exp. Phys. II) ; Kowalski, H. (DESY) ; Kretzschmar, J. (Liverpool U.) ; Kruger, K. (DESY) ; Krupa, B. (Cracow, INP) ; Kuprash, O. (DESY) ; Kuze, M. (Tokyo Inst. Tech.) ; Landon, M.P.J. (Queen Mary, U. of London) ; Lange, W. (DESY) ; Laycock, P. (Liverpool U.) ; Lebedev, A. (Lebedev Inst.) ; Levchenko, B.B. (Moscow State U.) ; Levonian, S. (DESY) ; Levy, A. (Tel Aviv U.) ; Libov, V. (DESY) ; Limentani, S. (INFN, Padua) ; Lipka, K. (DESY) ; Lisovyi, M. (Heidelberg U.) ; List, B. (DESY) ; List, J. (DESY) ; Lobodzinska, E. (DESY) ; Lobodzinski, B. (Munich, Max Planck Inst.) ; Lohr, B. (DESY) ; Lohrmann, E. (Hamburg U., Inst. Exp. Phys. II) ; Longhin, A. (INFN, Padua) ; Lontkovskyi, D. (DESY) ; Lukina, O.Yu. (Moscow State U.) ; Makarenko, I. (DESY) ; Malinovski, E. (Lebedev Inst.) ; Malka, J. (DESY) ; Martyn, H.U. (Aachen, Tech. Hochsch.) ; Maxfield, S.J. (Liverpool U.) ; Mehta, A. (Liverpool U.) ; Mergelmeyer, S. (Bonn U.) ; Meyer, A.B. (DESY) ; Meyer, H. (Wuppertal U., Dept. Math.) ; Meyer, J. (DESY) ; Mikocki, S. (Cracow, INP) ; Idris, F.Mohamad (MOSTI, Malaysian Nucl. Agency, Kajang) ; Morozov, A. (Dubna, JINR) ; Nasir, N.Muhammad (Malaya U.) ; Muller, K. (Zurich U.) ; Myronenko, V. (DESY) ; Nagano, K. (KEK, Tsukuba) ; Naumann, Th. (DESY) ; Newman, P.R. (Birmingham U.) ; Niebuhr, C. (DESY) ; Nikiforov, A. (DESY) ; Nobe, T. (Tokyo Inst. Tech.) ; Notz, D. (DESY) ; Nowak, G. (Cracow, INP) ; Nowak, R.J. (Warsaw U. of Tech.) ; Olsson, J.E. (DESY) ; Onishchuk, Yu. (Taras Shevchenko U.) ; Ozerov, D. (DESY) ; Pahl, P. (DESY) ; Pascaud, C. (Orsay) ; Patel, G.D. (Liverpool U.) ; Paul, E. (Bonn U.) ; Perez, E. (CERN) ; Perlanski, W. (Lodz U.) ; Petrukhin, A. (Lyon, IPN) ; Picuric, I. (Montenegro U.) ; Pirumov, H. (DESY) ; Pitzl, D. (DESY) ; Pokorny, B. (Charles U.) ; Pokrovskiy, N.S. (IPT, Kazakstan) ; Polifka, R. (Toronto U.) ; Przybycien, M. (AGH-UST, Cracow) ; 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.) ; Roloff, P. (CERN) ; Roosen, R. (Antwerp U., WISINF) ; Rostovtsev, A. (IITP, Moscow) ; Rotaru, M. (Bucharest, IFIN-HH) ; Rubinsky, I. (DESY) ; Rusakov, S. (Lebedev Inst.) ; Ruspa, M. (INFN, Turin) ; Salek, D. (Charles U.) ; Sankey, D.P.C. (Rutherford) ; Sauter, M. (Heidelberg U.) ; Sauvan, E. (Annecy, LAPP) ; Saxon, D.H. (Glasgow U.) ; Schioppa, M. (INFN, Cosenza) ; Schmidke, W.B. (Munich, Max Planck Inst.) ; Schmitt, S. (DESY) ; Schneekloth, U. (DESY) ; Schoeffel, L. (DAPNIA, Saclay) ; Schoning, A. (Heidelberg U.) ; Schorner-Sadenius, T. (DESY) ; Sefkow, F. (DESY) ; Shcheglova, L.M. (Moscow State U.) ; Shevchenko, R. (Kiev Polytechnic Inst.) ; Shkola, O. (Natl. U. Kiev Mohyla Acad.) ; Shushkevich, S. (DESY) ; Shyrma, Yu. (Kiev, INR) ; Singh, I. (Panjab U.) ; Skillicorn, I.O. (Glasgow U.) ; Slominski, W. (Jagiellonian U.) ; Solano, A. (INFN, Turin) ; Soloviev, Y. (Lebedev Inst.) ; Sopicki, P. (Cracow, INP) ; South, D. (DESY) ; Spaskov, V. (Dubna, JINR) ; Specka, A. (Ecole Polytechnique) ; Stanco, L. (INFN, Padua) ; Steder, M. (DESY) ; Stefaniuk, N. (DESY) ; Stella, B. (INFN, Rome) ; Stern, A. (Tel Aviv U.) ; Stopa, P. (Cracow, INP) ; Straumann, U. (Zurich U.) ; Sykora, T. (Charles U.) ; Sztuk-Dambietz, J. (Hamburg U., Inst. Exp. Phys. II) ; Szuba, D. (Hamburg U., Inst. Exp. Phys. II) ; Szuba, J. (DESY) ; Tassi, E. (INFN, Cosenza) ; Thompson, P.D. (Birmingham U.) ; Tokushuku, K. (Tokyo U.) ; Tomaszewska, J. (Warsaw U. of Tech.) ; Traynor, D. (Queen Mary, U. of London) ; Trofymov, A. (DESY) ; Truol, P. (Zurich U.) ; Tsakov, I. (Sofiya, Inst. Nucl. Res.) ; Tseepeldorj, B. (Ulaanbaatar U.) ; Tsurugai, T. (Meiji Gakuin U.) ; Turcato, M. (Hamburg U., Inst. Exp. Phys. II) ; Turkot, O. (DESY) ; Turnau, J. (Cracow, INP) ; Tymieniecka, T. (NCBJ, Swierk) ; Valkarova, A. (Charles U.) ; Vallee, C. (Marseille, CPPM) ; Van Mechelen, P. (Antwerp U., WISINF) ; Vazdik, Y. (Lebedev Inst.) ; Verbytskyi, A. (Munich, Max Planck Inst.) ; Viazlo, O. (Taras Shevchenko U.) ; Walczak, R. (Oxford U.) ; Wan Abdullah, W.A.T. (Malaya U.) ; Wegener, D. (Dortmund U.) ; Wichmann, K. (DESY) ; Wing, M. (DESY) ; Wolf, G. (DESY) ; Wunsch, E. (DESY) ; Yamada, S. (KEK, Tsukuba) ; Yamazaki, Y. (KEK, Tsukuba) ; Zacek, J. (Charles U.) ; Zakharchuk, N. (DESY) ; Zarnecki, A.F. (Warsaw U. of Tech.) ; Zawiejski, L. (Cracow, INP) ; Zenaiev, O. (DESY) ; Zhang, Z. (Orsay) ; Zhautykov, B.O. (IPT, Kazakstan) ; Zhmak, N. (Kiev, INR) ; Zlebcik, R. (Charles U.) ; Zohrabyan, H. (Yerevan Phys. Inst.) ; Zomer, F. (Orsay) ; Zotkin, D.S. (Moscow State U.)

Pages: 160

Abstract: A combination is presented of all inclusive deep inelastic cross sections previously published by the H1 and ZEUS collaborations at HERA for neutral and charged current $e^{\pm}p$ scattering for zero beam polarisation. The data were taken at proton beam energies of 920, 820, 575 and 460 GeV and an electron beam energy of 27.5 GeV. The data correspond to an integrated luminosity of about 1 fb$^{-1}$ and span six orders of magnitude in negative four-momentum-transfer squared, $Q^2$, and Bjorken $x$. The correlations of the systematic uncertainties were evaluated and taken into account for the combination. The combined cross sections were input to QCD analyses at leading order, next-to-leading order and at next-to-next-to-leading order, providing a new set of parton distribution functions, called HERAPDF2.0. In addition to the experimental uncertainties, model and parameterisation uncertainties were assessed for these parton distribution functions. Variants of HERAPDF2.0 with an alternative gluon parameterisation, HERAPDF2.0AG, and using fixed-flavour-number schemes, HERAPDF2.0FF, are presented. The analysis was extended by including HERA data on charm and jet production, resulting in the variant HERAPDF2.0Jets. The inclusion of jet-production cross sections made a simultaneous determination of these parton distributions and the strong coupling constant possible, resulting in $\alpha_s(M_Z)=0.1183 \pm 0.0009 {\rm(exp)} \pm 0.0005{\rm (model/parameterisation)} \pm 0.0012{\rm (hadronisation)} ^{+0.0037}_{-0.0030}{\rm (scale)}$. An extraction of $xF_3^{\gamma Z}$ and results on electroweak unification and scaling violations are also presented.

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