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Zeitschrift für Physik C Particles and Fields

, Volume 41, Issue 4, pp 533–538 | Cite as

Study ofη production in two-photon collisions

  • TASSO Collaboration
  • W. Braunschweig
  • R. Gerhards
  • F. J. Kirschfink
  • H. -U. Martyn
  • B. Bock
  • H. M. Fischer
  • H. Hartmann
  • J. Hartmann
  • E. Hilger
  • A. Jocksch
  • V. Mertens
  • R. Wedemeyer
  • B. Foster
  • A. J. Martin
  • A. J. Sephton
  • E. Bernardi
  • J. Chwastowski
  • A. Eskreys
  • K. Gather
  • K. Genser
  • H. Hultschig
  • P. Joos
  • H. Kowalski
  • A. Ladage
  • B. Löhr
  • D. Lüke
  • P. Märtig
  • D. Notz
  • J. M. Pawlak
  • K. -U. Posnecker
  • E. Ros
  • D. Trines
  • R. Walczak
  • G. Wolf
  • H. Kolanoski
  • T. Kracht
  • J. Krüger
  • E. Lohrmann
  • G. Poelz
  • W. Zeuner
  • J. Hassard
  • J. Shulman
  • D. Su
  • F. Barreiro
  • A. Leites
  • J. del Peso
  • C. Balkwill
  • M. G. Bowler
  • P. N. Burrows
  • G. P. Heath
  • P. Ratoff
  • I. Silvester
  • I. Tomalin
  • E. Veitch
  • G. E. Forden
  • J. C. Hart
  • D. H. Saxon
  • S. Brandt
  • M. Holder
  • L. Labarga
  • E. Duchovni
  • Y. Eisenberg
  • D. Hochman
  • U. Karshon
  • L. Lyons
  • G. Mikenberg
  • A. Montag
  • D. Revel
  • E. Ronat
  • A. Shapira
  • N. Wainer
  • G. Yekutieli
  • A. Caldwell
  • D. Muller
  • S. Ritz
  • D. Strom
  • M. Takashima
  • E. Wicklund
  • Sau Lan Wu
  • G. Zobernig
Article

Abstract

Production of theη c meson ine+e quasireal two photon collisions has been looked for in three channels. The data were obtained from an integrated luminosity of 189 pb−1. Anη c signal is observed in two decay modes (K s 0 K±π+π-π+π-) with a combined statistical significance of 3.5 standard deviations. Using the knownη c branching ratios to these channels and toK+K-π+π- the combined partialη c width to γγ isΓγγ(η c ). The first error is statistical, and the second one includes the systematic and branching ratio errors. Calculated as an upper limit we obtainΓγγ(η c ) (95% C.L., including the systematic error).

Keywords

Standard Deviation Field Theory Elementary Particle Quantum Field Theory Systematic Error 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1989

Authors and Affiliations

  • TASSO Collaboration
  • W. Braunschweig
    • 1
  • R. Gerhards
    • 1
  • F. J. Kirschfink
    • 1
  • H. -U. Martyn
    • 1
  • B. Bock
    • 2
  • H. M. Fischer
    • 2
  • H. Hartmann
    • 2
  • J. Hartmann
    • 2
  • E. Hilger
    • 2
  • A. Jocksch
    • 2
  • V. Mertens
    • 2
  • R. Wedemeyer
    • 2
  • B. Foster
    • 3
  • A. J. Martin
    • 3
  • A. J. Sephton
    • 3
  • E. Bernardi
    • 4
  • J. Chwastowski
    • 4
  • A. Eskreys
    • 4
  • K. Gather
    • 4
  • K. Genser
    • 4
  • H. Hultschig
    • 4
  • P. Joos
    • 4
  • H. Kowalski
    • 4
  • A. Ladage
    • 4
  • B. Löhr
    • 4
  • D. Lüke
    • 4
  • P. Märtig
    • 4
  • D. Notz
    • 4
  • J. M. Pawlak
    • 4
  • K. -U. Posnecker
    • 4
  • E. Ros
    • 4
  • D. Trines
    • 4
  • R. Walczak
    • 4
  • G. Wolf
    • 4
  • H. Kolanoski
    • 5
  • T. Kracht
    • 6
  • J. Krüger
    • 6
  • E. Lohrmann
    • 6
  • G. Poelz
    • 6
  • W. Zeuner
    • 6
  • J. Hassard
    • 7
  • J. Shulman
    • 7
  • D. Su
    • 7
  • F. Barreiro
    • 8
  • A. Leites
    • 8
  • J. del Peso
    • 8
  • C. Balkwill
    • 9
  • M. G. Bowler
    • 9
  • P. N. Burrows
    • 9
  • G. P. Heath
    • 9
  • P. Ratoff
    • 9
  • I. Silvester
    • 9
  • I. Tomalin
    • 9
  • E. Veitch
    • 9
  • G. E. Forden
    • 10
  • J. C. Hart
    • 10
  • D. H. Saxon
    • 10
  • S. Brandt
    • 11
  • M. Holder
    • 11
  • L. Labarga
    • 11
  • E. Duchovni
    • 12
  • Y. Eisenberg
    • 12
  • D. Hochman
    • 12
  • U. Karshon
    • 12
  • L. Lyons
    • 12
  • G. Mikenberg
    • 12
  • A. Montag
    • 12
  • D. Revel
    • 12
  • E. Ronat
    • 12
  • A. Shapira
    • 12
  • N. Wainer
    • 12
  • G. Yekutieli
    • 12
  • A. Caldwell
    • 13
  • D. Muller
    • 13
  • S. Ritz
    • 13
  • D. Strom
    • 13
  • M. Takashima
    • 13
  • E. Wicklund
    • 13
  • Sau Lan Wu
    • 13
  • G. Zobernig
    • 13
  1. 1.I. Physikalisches Institut der RWTHAachenFederal Republic of Germany
  2. 2.Physikalisches Institut der UniversitätBonnFederal Republic of Germany
  3. 3.H.H. Wills Physics LaboratoryUniversity of BristolBristolUK
  4. 4.Deutsches Elektronen-Synchrotron DESYHamburgFederal Republic of Germany
  5. 5.Institut für Physik, UniversitätDourtmundFederal Republic of Germany
  6. 6.II. Institut für Experimentalphysik der UniversitätHamburgFederal Republic of Germany
  7. 7.Department of PhysicsImperial CollegeLondonUK
  8. 8.Universidad Autonoma de MadridMadridSpain
  9. 9.Department of Nuclear PhysicsOxford UniversityOxfordUK
  10. 10.Rutherford Appleton LaboratoryDidcotUK
  11. 11.Fachbereich Physik der Universität-GesamthochschuleSiegenFederal Republic of Germany
  12. 12.Weizmann InstituteRehovotIsrael
  13. 13.Department of PhysicsUniversity of WisconsinMadisonUSA

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