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Measurement of the radiative width of theA 2(1320) in two-photon interactions

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Zeitschrift für Physik C Particles and Fields

Abstract

The reactione +e−→e +e− A2 (1320) has been observed by detecting the decayA 2→π+,π-π0. The two-photon width of theA 2 has been measured to be Г(A 2→γγ)=(0.09±0.27 (stat)±0.16 (syst)) keV. The cross section σ(γ γ→π+,π-π0 has been determined outside theA 2 resonance region.

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Author information

Author notes

  1. M. Althoff

    Present address: Siemens, München, FRG

  2. H. Kück

    Present address: Fraunhofer Institut, Duisburg, FRG

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

    Present address: Weizmann Institute, Rehovot, Israel

  4. A. Eskreys

    Present address: Institute of Nuclear Physics, Cracow, Poland

  5. P. Mättig

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

  6. T. Tymieniecka

    Present address: Warsaw University, Warsaw, Poland

  7. R. Walczak

    Present address: Warsaw University, Warsaw, Poland

  8. H. L. Krasemann

    Present address: GKSS, Geesthacht, FRG

  9. J. Thomas

    Present address: CERN, Geneva, Switzerland

  10. W. A. T. Wan Abdullah

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

  11. L. Labarga

    Present address: Universidad Autónoma de Madrid, Madrid, Spain

  12. M. Cherney

    Present address: LBL, Berkeley, CA, USA

  13. J. M. Izen

    Present address: University of Illinois, Urbana, IL, USA

  14. E. Wicklund

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

Authors and Affiliations

  1. Physikalishes 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, A. Jocksch, H. Kolanoski, H. Kück, V. Mertens & R. Wedemeyer

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

    B. Foster

  4. Deutsches Elektronen Synchroton, 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. Lüke, 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 Autónoma 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. Mellor & P. Ratoff

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

    S. L. Lloyd

  10. Rutherford Appleton Laboratory, Chilton, OX11 0QX, 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. Holder, L. Labarga & B. Neumann

  12. Weizmann Institute, 76100, Rehovot, Israel

    U. Karshon, G. Mikenberg, R. Mir, A. Montag, 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, E. Wicklund, Sau Lan Wu & G. Zonering

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TASSO Collaboration

Additional information

Supported by the Deutsches Bundesministerium für Forschung und Technologie

Supported by the UK Science and Engineering Research Council

Supported by CAICYT

Supported by the Minerva Gesellschaft für Forschung mbH

Supported by the US Department of Energy contract DEAC02-76ER00881 and the US National Science foundation grant number INT-8313994 for travel

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TASSO Collaboration., Althoff, M., Braunschweig, W. et al. Measurement of the radiative width of theA 2(1320) in two-photon interactions. Z. Phys. C - Particles and Fields 31, 537–543 (1986). https://doi.org/10.1007/BF01551074

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  • DOI: https://doi.org/10.1007/BF01551074

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