Z. Phys. C - Particles and Fields 41, 353-357 (1988) Zeitschrift P a r t i d e s fi3r Physik C and Fields 9 Springer-Verlag 1988 Measurement of the two-photon reaction § + at large values of Q2 TASSO Collaboration W. Braunschweig, R. Gerhards, F.J. Kirschfink, H.-U. Martyn I. Physikalisches Institut der RWTH, Aachen, Federal Republic of Germany a B. Bock ~, H.M. Fischer, H. Hartmann, J. Hartmann, E. Hilger, A. Jocksch, R. Wedemeyer Physikalisches Institut der UniversitS.t, Bonn, Federal Republic of Germany" B. Foster, A.J. Martin, A.J. Sephton H.H. Wills Physics Laboratory, University of Bristol, Bristol, UK b F. Barreiro 14, E. Bernardi 2, J. Chwastowski a, A. Eskreys 4, K. Gather, K. Genser s, H. Hultschig, P. Joos, H. Kowalski, A. Ladage, B. L6hr, D. Lfike, P. M/ittig 6, D. Notz, J.M. Pawlak 7, K.-U. P6snecker, E. Ros, D. Trines, R. Walczak s, G. Wolf Deutsches Electronen-Synchrotron DESY, Hamburg, Federal Republic of Germany H. Kolanoski Institut ffir Physik, UniversitS.t, Dortmund, Federal Republic of Germany a T. Kracht 8, j. Krfiger, E. Lohrmann, G. Poelz, W. Zeuner II. Institut fiir Experimentalphysik der Universit/it, Hamburg, Federal Republic of Germany a Received 8 July 1988 1 NOW at Krupp Atlas Elektr. GmbH, Bremen, FRG 2 Now at Robert Bosch GmbH, Schwieberdingen, FRG 3 On leave from Inst. of Nuclear Physics, Cracow, Poland Now at Inst. of Nuclear Physics, Cracow, Poland 5 Now at Warsaw University, Poland 6 Now at IPP Canada, Carleton University, Ottawa, Canada 7 On leave from Warsaw University, Poland s Now at Hasylab, DESY 9 Now at SUNY Stony Brook, Stony Brook, NY, USA lo Now at SLAC, Stanford, CA, USA 11 Now at Columbia University, NY, USA 12 Now at University of Chicago, Chicago, IL, USA D.M. Binnie, J. Hassard, J. Shulman, D. SU 15 Department of Physics, Imperial College, London, UK b A. Leites, J. del Peso Universidad Autonoma de Madrid, Madrid, Spain c C. Balkwill, M.G. Bowler, P.N. Burrows, G.P. Heath, P.N. Ratoff, I.M. Silvester, I.R. Tomalin, M.E. Veitch Department of Nuclear Physics, Oxford University, Oxford, UK b G.E. Forden 9, J.C. Hart, D.H. Saxon Rutherford Appleton Laboratory, Chilton, Didcot, UK b S. Brandt, M. Holder, L. Labarga lO Fachbereich Physik der Universit/it-Gesamthochschule,Siegen, Federal Republic of Germany" Y. Eisenberg, U. Karshon, G. Mikenberg, A. Montag, D. Revel, E. Ronat, A. Shapira, N. Wainer, G. Yekutieli Weizmann Institute, Rehovot, Israel d A. Caldwell 11, D. Muller, S. Ritz, D. Strom ~2, M. Takashima, E. Wicklund ~3, Sau Lan Wu, G. Zobernig Department of Physics, University of Wisconsin, Madison, WI, USA e 13 Now at California Inst. of Technology, Pasadena, CA, USA 14 Alexander yon Humboldt Fellow, on leave of absence from Un- iversidad Autonoma de Madrid, Spain 15 Now at Rutherford Appleton Laboratory, Chilton, Didcot, UK a Supported by Bundesministerium ffir Forschung und Technologie b Supported by UK Science and Engineering Research Council ~ Supported by CAICYT d Supported by the Minerva Gesellschaft ffir Forschung GmbH ~ Supported by US Dept. of Energy, contract DE-AC02- 76ER000881 and by US Nat. Sci. Foundation Grant number INT- 8313994 for travel