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Measurement of the photon structure functionF ψ2 atQ 2 from 7 to 70 (GeV/c)2

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Zeitschrift für Physik C Particles and Fields

Abstract

We have measured the processe + e −→e + e −+hadrons, where one of the scattered electrons was detected at large angles, withQ 2 ranging from 7 to 70 (VeV/c)2. The photon structure functionF γ2 (x, Q2) was determined at an averageQ 2 of 23 (GeV/c)2. The measurements were compared to theoretical predictions of the Quark Parton Model and Quantum Chromodynamics. In both models a hadronic part was added. Within the errors the data are in agreement with the QPM using quark masses of 300 MeV/c2 for the light quarks. The data also agree with a QCD calculation including higher order corrections. A fit yielded a\(\Lambda _{\overline {MS} } \) value of 140 +190−65 MeV, where the errors include statistical and systematic uncertainties.

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Author notes

  1. M. Althoff

    Present address: Siemens, München, FRG

  2. W. Hillen

    Present address: Philipps, Aachen, FRG

  3. H. Kück

    Present address: Fraunhofer Institut, Duisburg, FRG

  4. Y. Eisenberg, D. Revel & E. Ronat

    Present address: Weizmann Institute, Rehovot, Israel

  5. A. Eskreys

    Present address: Institute of Nuclear Physics, Cracow, Poland

  6. P. Mättig

    Present address: IPP Canada, Carleton University, Ottawa, Canada

  7. T. Tymieniecka

    Present address: Warsaw University, Warsaw, Poland

  8. R. Walczak

    Present address: Warsaw University, Warsaw, Poland

  9. H. L. Krasemann

    Present address: GKSS, Geesthacht, FRG

  10. J. Thomas & M. Dittmar

    Present address: CERN, Geneva, Switzerland

  11. W. A. T. Wan Abdullah

    Present address: University of Malaya, Kuaala, Lumpur, Malaysia

  12. P. Bull

    Present address: British Telecomm, UK

  13. L. Labarga

    Present address: Universidad Autonoma de Madrid, Madrid, Spain

  14. M. Cherney

    Present address: Lawrence Berkeley Laboratory, Berkeley, CA, USA

  15. J. M. Izen

    Present address: University of Illinois, Urbana-Champaign, USA

  16. H. Venkataramania

    Present address: Yale University, New Haven, CT, USA

  17. E. Wicklund

    Present address: California Institute of Technology, Pasadena, CA, USA

Authors and Affiliations

  1. Physikalisches Institut der RWTH Aachen, D-5100, Aachen, Federal Republic of Germany

    M. Althoff, W. Braunschweig, R. Gerhards, F. J. Kirschfink, H. U. Martyn, P. Rosskamp & W. Wallraff

  2. Physikalisches Institut der Universität Bonn, D-5300, Bonn, Federal Republic of Germany

    B. Bock, J. Eisenmann, H. M. Fischer, H. Hartmann, W. Hillen, A. Jocksch, H. Kolanoski, H. Kück, V. Mertens & R. Wedemeyer

  3. H.H. Wills Physics Lab., University of Bristol, BS8 1TL, Bristol, UK

    B. Foster

  4. Deutsches Elektronen-Synchrotron, DESY, D-2000, Hamburg, Federal Republic of Germany

    E. Bernardi, Y. Eisenberg, A. Eskreys, K. Gather, H. Hultschig, P. Joos, B. Klima, H. Kowalski, A. Ladage, B. Löhr, D. Lueke, P. Mättig, D. Notz, D. Revel, E. Ronat, D. Trines, T. Tymieniecka, R. Walczak, G. Wolf & W. Zeuner

  5. Institut für Experimentalphysik der Universität Hamburg, D-2000, Hamburg, Federal Republic of Germany

    E. Hilger, T. Kracht, H. L. Krasemann, J. Krüger, E. Lohrmann, G. Poelz & K. U. Pösnecker

  6. Department of Physics, Imperial College, SW7 2AZ, London, UK

    D. M. Binnie, P. J. Dornan, D. A. Garbutt, C. Jenkins, W. G. Jones, J. K. Sedgbeer, D. Su, J. Thomas & W. A. T. Wan Abdullah

  7. Universidad Autonoma de Madrid, Madrid, Spain

    F. Barreiro & E. Ros

  8. Department of Nuclear Physics, Oxford University, OX1 3RH, Oxford, UK

    M. G. Bowler, P. Bull, R. J. Cashmore, P. Dauncey, R. Devenish, G. Heath & D. J. Mellor

  9. Department of Physics, Queen Mary College, E1 4NS, London, UK

    S. L. Lloyd

  10. Rutherford Appleton Laboratory, Chilton, OX11 OQX, Oxon, UK

    G. E. Forden, J. C. Hart, D. K. Hasell & D. H. Saxon

  11. Fachbereich Physik der Universität-Gesamthochschule Siegen, D-5900, Siegen, Federal Republic of Germany

    S. Brandt, M. Dittmar, M. Holder, L. Labarga & B. Neumann

  12. Weizmann Institute, 76100, Rehovot, Israel

    U. Karshon, G. Mikenberg, A. Montag, R. Mir, A. Shapira & G. Yekutieli

  13. Department of Physics, University of Wisconsin, 53706, Madison, WI, USA

    G. Baranko, A. Caldwell, M. Cherney, J. M. Izen, S. Ritz, D. Strom, M. Takashima, H. Venkataramania, E. Wicklund, Sau Lan Wu & G. Zobernig

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  1. M. Althoff
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  2. W. Braunschweig
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  3. R. Gerhards
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  4. F. J. Kirschfink
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  6. P. Rosskamp
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  7. W. Wallraff
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  8. B. Bock
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  87. H. Venkataramania
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  89. Sau Lan Wu
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  90. G. Zobernig
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TASSO Collaboration

Additional information

Supported by the Bundesministerium für Forschung und Technologie

Supported by the UK Science and Engineering Research Council

Suported by CAICYT

Supported by the Minerva Gesellschaft für Forschung mbH

Supported by the US Department of Energy, contract DEACO2-76ERoo881 and by the U.S. National Science Foundation Grant Number INT-8313994 for travel

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TASSO Collaboration., Althoff, M., Braunschweig, W. et al. Measurement of the photon structure functionF ψ2 atQ 2 from 7 to 70 (GeV/c)2 . Z. Phys. C - Particles and Fields 31, 527–535 (1986). https://doi.org/10.1007/BF01551073

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  • DOI: https://doi.org/10.1007/BF01551073

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