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Deep-Inelastic Inclusive ep Scattering at Low x and a Determination of $\alpha_{s}$

C. Adloff V. Andreev B. Andrieu 1 T. Anthonis V. Arkadov A. Astvatsatourov I. Ayyaz A. Babaev J. Bahr P. Baranov E. Barrelet W. Bartel U. Bassler P. Bate A. Beglarian O. Behnke C. Beier A. Belousov T. Benisch C. Berger G. Bernardi T. Berndt J C. Bizot 2 V. Boudry 1 W. Braunschweig V. Brisson 2 B. Broker D P. Brown W. Bruckner Pascal Bruel 1 D. Bruncko J. Burger F W. Busser A. Bunyatyan H. Burkhardt A. Burrage G. Buschhorn a J. Campbell J. Cao T. Carli S. Caron E. Chabert D. Clarke B. Clerbaux C. Collard J G. Contreras y R. Coppens J A. Coughlan M C. Cousinou B E. Cox G. Cozzika J. Cvach J B. Dainton W D. Dau K. Daum M. Davidsson B. Delcourt 2 N. Delerue R. Demirchyan A. de Roeck E A. de Wolf C. Diaconu P. Dixon V. Dodonov J D. Dowell A. Droutskoi C. Duprel G. Eckerlin D. Eckstein V. Efremenko S. Egli R. Eichler F. Eisele E. Eisenhandler M. Ellerbrock E. Elsen M. Erdmann W. Erdmann P J W. Faulkner L. Favart A. Fedotov R. Felst J. Ferencei S. Ferron 1 M. Fleischer y H. Fleming G. Flugge A. Fomenko I. Foresti J. Formanek J M. Foster G. Franke E. Gabathuler K. Gabathuler J. Garvey J. Gassner J. Gayler R. Gerhards S. Ghazaryan A. Glazov L. Gorlich N. Gogitidze M. Goldberg C. Goodwin C. Grab H. Grassler T. Greenshaw G. Grindhammer T. Hadig D. Haidt L. Hajduk W J. Haynes B. Heinemann G. Heinzelmann R C W. Henderson S. Hengstmann H. Henschel R. Heremans G. Herrera I. Herynek M. Hildebrandt M. Hilgers K H. Hiller J. Hladky P. Hoting D. Hoffmann W. Hoprich R. Horisberger S. Hurling M. Ibbotson C. Issever M. Jacquet 2 M. Jaffre 2 L. Janauschek D M. Jansen X. Janssen V. Jemanov L B. Jonsson D P. Johnson M a S. Jones H. Jung H K. Kastli D. Kant M. Kapichine M. Karlsson O. Karschnick F. Keil N. Keller J. Kennedy I R. Kenyon S. Kermiche C. Kiesling M. Klein C. Kleinwort G. Knies B. Koblitz S D. Kolya V. Korbel P. Kostka S K. Kotelnikov R. Koutouev A. Koutov M W. Krasny H. Krehbiel J. Kroseberg K. Kruger A. Kupper T. Kuhr T. Kurca R. Lahmann D. Lamb M P J. Landon W. Lange T. Lastoviicka E. Lebailly A. Lebedev B. Leiner R. Lemrani V. Lendermann S. Levonian M. Lindstrom B. List E. Lobodzinska B. Lobodzinski A. Loginov N. Loktionova V. Lubimov S. Luders D. Luke L. Lytkin N. Magnussen H. Mahlke-Kruger N. Malden E. Malinovskii I. Malinovski R. Maracek P. Marage J. Marks R. Marshall H U. Martyn J. Martyniak S J. Maxfield A. Mehta K. Meier P. Merkel F. Metlica a B. Meyer H. Meyer J. Meyer P O. Meyer S. Mikocki D. Milstead T. Mkrtchyan R. Mohr S. Mohrdieck M N. Mondragon F. Moreau 1 A. Morozov J V. Morris K. Muller P. Murn V. Nagovizin B. Naroska J. Naumann T. Naumann G. Nellen P R. Newman T C. Nicholls F. Niebergall C. Niebuhr O. Nix G. Nowak T. Nunnemann J E. Olsson D. Ozerov V. Panassik C. Pascaud 2 G D. Patel Emile Perez J P. Phillips D. Pitzl R. Poschl I. Potachnikova B. Povh K. Rabbertz G. Radel J. Rauschenberger P. Reimer B. Reisert D. Reyna S. Riess C. Risler E. Rizvi P. Robmann R. Roosen A. Rostovtsev C. Royon S. Rusakov K. Rybicki D P C. Sankey J. Scheins F P. Schilling P. Schleper D. Schmidt S. Schmitt L. Schoeffel A. Schoning T. Schorner V. Schroder H C. Schultz-Coulon C. Schwanenberger K. Sedlak F. Sefkow V. Shekelian I. Shevyakov L N. Shtarkov G. Siegmon P. Sievers Y. Sirois 1 T. Sloan P. Smirnov V. Solochenko Yu. Solovev V. Spaskov A. Specka 1 H. Spitzer R. Stamen J. Steinhart B. Stella A. Stellberger J. Stiewe U. Straumann W. Struczinski M. Swart M. Tasevsky V. Chernyshov S. Chechelnitskii G. Thompson P D. Thompson N. Tobien D. Traynor P. Truol G. Tsipolitis I. Tsurin J. Turnau J E. Turney E. Tzamariudaki S. Udluft A. Usik S. Valkar A. Valkarova C. Vallee P. van Mechelen S. Vassiliev Ya. Vazdik A. Vichnevski S. von Dombrowski K. Wacker R. Wallny T. Walter B. Waugh G. Weber M. Weber D. Wegener M. Werner G. White S. Wiesand T. Wilksen M. Winde G G. Winter C. Wissing M. Wobisch H. Wollatz E. Wunsch a C. Wyatt J. Zaicek J. Zaleisak Zhiqing Zhang 2 A. Zhokin F. Zomer 2 J. Zsembery M. Zur Nedden
Abstract : A precise measurement of the inclusive deep-inelastic e^+p scattering cross section is reported in the kinematic range 1.5 = Q^2 =150 GeV^2 and 3*10^(-5) = x =0.2. The data were recorded with the H1 detector at HERA in 1996 and 1997, and correspond to an integrated luminosity of 20 pb^(-1).The double differential cross section, from which the proton structure function F_2(x,Q^2) and the longitudinal structure function F_L(x,Q^2) are extracted, is measured with typically 1% statistical and 3% systematic uncertainties. The measured partial derivative (dF_2(x,Q^2)/dln Q^2)_x is observed to rise continuously towards small x for fixed Q^2. The cross section data are combined with published H1 measurements at high Q^2 for a next-to-leading order DGLAP QCD analysis.The H1 data determine the gluon momentum distribution in the range 3*10^(-4) = x =0.1 to within an experimental accuracy of about 3% for Q^2 =20 GeV^2. A fit of the H1 measurements and the mu p data of the BCDMS collaboration allows the strong coupling constant alpha_s and the gluon distribution to be simultaneously determined. A value of alpha _s(M_Z^2)=0.1150+-0. 0017 (exp) +0.0009-0.0005 (model) is obtained in NLO, with an additional theoretical uncertainty of about +-0.005, mainly due to the uncertainty of the renormalisation scale.
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Submitted on : Saturday, January 20, 2001 - 3:37:19 PM
Last modification on : Wednesday, April 7, 2021 - 3:26:01 PM

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C. Adloff, V. Andreev, B. Andrieu, T. Anthonis, V. Arkadov, et al.. Deep-Inelastic Inclusive ep Scattering at Low x and a Determination of $\alpha_{s}$. 2000. ⟨in2p3-00008074⟩

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