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Three-jet production inpp collisions at\(\sqrt s = 63 GeV\) and a determination of α s

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Zeitschrift für Physik C Particles and Fields

Abstract

We have studiedpp collisions at the CERN ISR at\(\sqrt s = 63 GeV\) using a jet trigger. We demonstrate that a sample of well-separated triple high-p T jet events can be described as due to the QCD bremsstrahlung process. The energy flow of these 3-jet events is well described by an independent fragmentation model, with a gluon-jet transverse width 33% greater than the quark-jet width. From the ratio of the 3- and 2-jet production crosssections the strong coupling is determined to lowest order in QCD. We find α s =0.18±0.03 (stat.) ±0.04 (stst.). The error does not include the theoretical uncertainty in the fragmentation scheme.

We compare our results with measurements at the SPS Collider and discuss the different methods used.

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References

  1. T. Akesson et al.: Phys. Lett.118B, 185 (1982); A.L.J. Angelis et al.: Phys. Lett.126B, 183 (1983); G. Arnison et al.: Phys. Lett.123B, 115 (1983); M. Banner et al.: Phys. Lett.118B, 203 (1982); T. Akesson et al.: Phys. Lett.123B, 133 (1983); T. Akesson et al.: Phys. Lett.128B, 354 (1983); T. Akesson et al.: Z. Phys. C—Particles and Fields25, 13 (1983)

    Google Scholar 

  2. R. Brandelik et al.: Phys. Lett.86B, 243 (1979)

    Google Scholar 

  3. A. Ali, E. Pietarinen, W.J. Stirling: Phys. Lett.141 B, 447 (1984)

    Google Scholar 

  4. H. Gordon et al.: Nucl. Instrum. Methods196, 303 (1982); O. Botner et al.: Nucl. Instrum. Methods196, 315 (1982); T. Akesson et al.: Nucl. Instrum. Methods241, 17 (1985); L. Rosselet: Proc. Topical Conf. on the Application of Microprocessors to High-Energy Physics Experiments, Geneva, 1981 (CERN 81-07, Geneva, 1981), p. 316

    Google Scholar 

  5. T. Akesson et al.: Z. Phys. C—Particles and Fields30, 27 (1986)

    Google Scholar 

  6. T.D. Gottschalk, D. Sivers: Phys. Rev.D21, 102 (1980)

    Google Scholar 

  7. T.D. Gottschalk, E. Monsay, D. Sivers: Phys. Rev.D21, 1799 (1980). We have checked numerically that these matrix elements agree with those in Ref. 9

    Google Scholar 

  8. Z. Kunszt, E. Pietarinen: Nucl. Phys.B164, 45 (1980)

    Google Scholar 

  9. F. Behrends et al.: Phys. Lett.103B, 124 (1981)

    Google Scholar 

  10. D.W. Duke, J.F. Owens: Phys. Rev.D30, 49 (1984)

    Google Scholar 

  11. F. Paige, S. Protopopescu: ISAJET, BNL 31987 (1982) and various corrections 1982–1985

  12. G.C. Fox, S. Wolfram: Nucl. Phys.B168, 285 (1980)

    Google Scholar 

  13. T. Sjöstrand: Z. Phys. C—Particles and Fields26, 93 (1984)

    Google Scholar 

  14. R. Feynman, R.D. Field: Nucl. Phys.B138, 1 (1978)

    Google Scholar 

  15. J. Ambjørn, P. Oleson, C. Peterson: Nucl. Phys.B240, 189 (1984)

    Google Scholar 

  16. G. Schierholz: Proc. 4th Top. Workshop onp \(\bar p\) Collider Physics, Berne, 1984 (CERN 84-09, Geneva, 1984), p. 84

  17. T.D. Gottschalk: Hadronization and fragmentation. Preprint CERN TH-3810 (1984)

  18. W. Bartel et al.: JADE Collaboration, Z. Phys. C—Particles and Fields21, 37 (1983)

    Google Scholar 

  19. H.-U. Bengtsson: Comput. Phys. Commun.31, 323 (1984);

    Google Scholar 

  20. H.-U. Bengtsson, G. Ingelman: Comput. Phys. Commun.34, 251 (1985)

    Google Scholar 

  21. H. Aihara et al.: TPC Collaboration, Z. Phys. C—Particles and Fields28, 31 (1985)

    Google Scholar 

  22. G. Arnison et al.: Phys. Lett.158B, 494 (1985)

    Google Scholar 

  23. J. Appel et al.: Z. Phys. C—Particles and Fields30, 341 (1986)

    Google Scholar 

  24. G. Arnison et al.: Lett. Nuovo Cimento44, 1 (1985)

    Google Scholar 

  25. G. Arnison et al.: Preprint CERN-EP/85-116 (1985); E. Buckley, W. Kozanecki: Improved correction table for calorimeter jets. UA1 Technical Note, TN 85-08 (1985)

Download references

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Authors and Affiliations

  1. Brookhaven National Laboratory, Upton, NY, USA

    H. Gordon, I. Stumer & C. Woody

  2. Cambridge University, CBS9EW, Cambridge, UK

    J. R. Carter & P. Cecil

  3. CERN, CH-1211, Geneva 23, Switzerland

    T. Åkesson, R. Batley, H. Breuker, C. W. Fabjan, U. Goerlach, S. Katsanevas, A. Markou, B. S. Nielsen, L. Rosselet, J. Schukraft, H. Specht & W. J. Willis

  4. Niels Bohr Institute, University of Copenhagen, DK-2100, Copenhagen, Denmark

    H. Bøggild, O. Botner, E. Dahl-Jensen, I. Dahl-Jensen, G. Damgaard, K. H. Hansen, R. Møller, L. Olsen & H. H. Thodberg

  5. University of Lund, S-22362, Lund, Sweden

    S. Almehed, V. Hedberg, G. Jarlskog, K. Kulka, B. Lörstad & U. Mjörnmark

  6. University of Pennsylvania, 19104, Philadelphia, PA, USA

    B. Callen, S. Frankel, W. Frati, W. Molzon, E. Vella & W. A. Zajc

  7. University of Pittsburgh, 15260, Pittsburgh, PA, USA

    Y. Choi, W. E. Cleland, R. Kroeger, M. Sullivan & J. A. Thompson

  8. Queen Mary College, E14NS, London, UK

    A. A. Carter

  9. Rutherford Appleton Laboratory, OX110QX, Didcot, UK

    M. G. Albrow, N. A. McCubbin & J. Williamson

  10. University of Tel Aviv, Israel

    O. Benary, S. Dagan, D. Lissauer & Y. Oren

Authors
  1. T. Åkesson
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  2. M. G. Albrow
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  3. S. Almehed
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  4. R. Batley
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  5. O. Benary
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  6. H. Bøggild
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  7. O. Botner
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  8. H. Breuker
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  9. B. Callen
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  10. A. A. Carter
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  11. J. R. Carter
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  12. P. Cecil
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  13. Y. Choi
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  14. W. E. Cleland
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  15. S. Dagan
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  16. E. Dahl-Jensen
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  17. I. Dahl-Jensen
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  18. G. Damgaard
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  19. C. W. Fabjan
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  20. S. Frankel
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  21. W. Frati
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  22. U. Goerlach
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  23. H. Gordon
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  24. K. H. Hansen
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  25. V. Hedberg
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  26. G. Jarlskog
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  27. S. Katsanevas
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  28. R. Kroeger
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  29. K. Kulka
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  30. D. Lissauer
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  31. B. Lörstad
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  32. A. Markou
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  33. N. A. McCubbin
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  34. U. Mjörnmark
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  35. R. Møller
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  36. W. Molzon
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  37. B. S. Nielsen
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  38. L. Olsen
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  39. Y. Oren
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  40. L. Rosselet
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  41. J. Schukraft
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  42. H. Specht
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  43. I. Stumer
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  44. M. Sullivan
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  45. H. H. Thodberg
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  46. J. A. Thompson
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  47. E. Vella
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  48. J. Williamson
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  49. W. J. Willis
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  50. C. Woody
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  51. W. A. Zajc
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The Axial Field Spectrometer Collaboration

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The Axial Field Spectrometer Collaboration., Åkesson, T., Albrow, M.G. et al. Three-jet production inpp collisions at\(\sqrt s = 63 GeV\) and a determination of α s . Z. Phys. C - Particles and Fields 32, 317–334 (1986). https://doi.org/10.1007/BF01551827

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  • DOI: https://doi.org/10.1007/BF01551827

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