Skip to main content

Particle distribution in 3-jet events produced bye e -annihilation

Abstract

We have studied the distribution of particles within and between jets of 3-jet final states produced in the reactione + e →hadrons at c.m. energies of 22 GeV and 29–36.4 GeV. The lowest energy jet shows distributions of transverse momenta, particle flow, and energy flow which differ significantly from those of the other two jets and from jets of 2-jet events atE cm=14 GeV. First order QCD calculations with subsequent fragmentation of quarks and gluons into hadrons indicate that the lowest energy jet has the largest probability of originating from a gluon. To reproduce the observed differences in an independent parton fragmentation model, the secondary quarks of a gluon jet have to have higher transverse momenta and lower parallel momenta than those of a quark jet. The particle densities between the jets as well as the correlation of transverse and longitudinal momenta of the particles within the jets favour models with fragmentation along the colour axes.

This is a preview of subscription content, access via your institution.

References

  1. 1.

    JADE Collab. W. Bartel et al.: Phys. Lett.91B, 142 (1980); MARK J. Collab. D.P. Barber et al.: Phys. Rev. Lett.43, 830 (1979); PLUTO Collab. Ch. Berger et al.: Phys. Lett.86B, 418 (1979); TASSO Collab. R. Brandelik et al.: Phys. Lett.86B, 243 (1979)

    Google Scholar 

  2. 2.

    JADE Collab. W. Bartel et al.: Phys. Lett.115B, 338 (1982)

    Google Scholar 

  3. 3.

    M.B. Einhorn, B.G. Weeks: Nucl. Phys. B146, 445 (1978); K. Shizuya, S.-H-H. TYe: Phys. Rev. Lett.41, 787 (1978)

    Google Scholar 

  4. 4.

    JADE Collab. W. Bartel et al.: Phys. Lett.101B, 129 (1981)

    Google Scholar 

  5. 5.

    JADE Collab. W. Bartel et al.: Phys. Lett.123B, 460 (1983)

    Google Scholar 

  6. 6.

    JADE Collab. W. Bartel et al.: Phys. Lett.88B, 171 (1979)

    Google Scholar 

  7. 7.

    S. Brandt, H. Dahmen: Z. Phys. C — Particles and Fields1, 61 (1979); S.L. Wu, G. Zobernig: Z. Phys. C — Particles and Fields2, 107 (1979)

    Google Scholar 

  8. 8.

    JADE Collab. W. Bartel et al.: Phys. Lett.119B, 239 (1982)

    Google Scholar 

  9. 9.

    P. Hoyer et al.: Nucl. Phys. B161, 349 (1979)

    Google Scholar 

  10. 10.

    D. Field, R.P. Feynman: Nucl. Phys. B136, 1 (1978)

    Google Scholar 

  11. 11.

    B. Andersson, G. Gustafson, C. Peterson: Z. Phys. C — Particles and Fields1, 105 (1978); B. Andersson, G. Gustafson: Z. Phys. C — Particles and Fields3, 223 (1980); B. Anderson, G. Gustafson, T. Sjöstrand: Z. Phys. C — Particles and Fields6, 235 (1980); B. Andersson, G. Gustafson, T. Sjöstrand: Phys. Lett.94B, 211 (1980); T. Sjöstrand: Comput. Phys. Comm.27, 243 (1982)

    Google Scholar 

  12. 12.

    A. Ali, E. Pietarinen, G. Kramer, J. Willrodt: Phys. Lett.93B, 155 (1980); A. Ali: Phys. Lett.110B, 67 (1982)

    Google Scholar 

  13. 13.

    F.A. Behrends, R. Kleiss: Nucl. Phys. B178, 141 (1981)

    Google Scholar 

  14. 14.

    C. Peterson, D. Schlatter, I. Schmitt, P.M. Zerwas: SLAC-PUP-2912 (1982), submitted to Phys. Rev. D.

  15. 15.

    JADE Collab. W. Bartel et al.: DESY 83-079 (1983), to be submitted to Phys. Lett.

  16. 16.

    JADE Collab. W. Bartel et al.: Z. Phys. C — Particles and Fields6, 296 (1980)

    Google Scholar 

  17. 17.

    JADE Collab. W. Bartel et al.: Z. Phys. C — Particles and Fields20, 187 (1983)

    Google Scholar 

  18. 18.

    T. Sjöstrand: Private communication

Download references

Author information

Affiliations

Authors

Consortia

Rights and permissions

Reprints and Permissions

About this article

Cite this article

JADE Collaboration., Bartel, W., Becker, L. et al. Particle distribution in 3-jet events produced bye e -annihilation. Z. Phys. C - Particles and Fields 21, 37–52 (1983). https://doi.org/10.1007/BF01648774

Download citation

Keywords

  • Transverse Momentum
  • Particle Acceleration
  • Energy Flow
  • Fragmentation Model
  • Large Probability