Elsevier

Physics Letters B

Volume 97, Issues 3–4, 15 December 1980, Pages 453-458
Physics Letters B

Evidence for a spin-1 gluon in three-jet events

https://doi.org/10.1016/0370-2693(80)90639-5Get rights and content

Abstract

High-energy e+e--annihilation events obtained in the TASSO detector at PETRA have been used to determine the spin of the gluon in the reaction e+eqq¯g. We analysed angular correlations between the three jet axes. While vector gluons are consistent with the data (55% confidence limit), scalar gluons are disfavoured by 3.8 standard deviations, corresponding to a confidence level of about 10−4. Our conclusion is free of possible biases due to uncertainties in the fragmentation process or in determining the qq¯g kinematics from the observed hadrons.

References (18)

  • BergerCh.

    Phys. Lett.

    (1979)
  • EllisJ. et al.

    Nucl. Phys.

    (1976)
    DeGrandT.A. et al.

    Phys. Rev.

    (1977)
    De RújulaA. et al.

    Nucl. Phys.

    (1978)
  • BrandelikR.

    Phys. Lett.

    (1980)
  • HoyerP. et al.

    Nucl. Phys.

    (1979)
  • FieldR.D. et al.

    Nucl. Phys.

    (1978)
  • HansonG.

    Phys. Rev. Lett.

    (1975)
  • EllisJ. et al.

    Nucl. Phys.

    (1979)
  • BrandelikR.

    Phys. Lett.

    (1979)

    Particles and Fields (Z. Phys. C)

    (1980)
  • WuS.L. et al.

    Particles and Fields (Z. Phys. C)

    (1979)
There are more references available in the full text version of this article.

Cited by (0)

1

On leave from Cornell University, Ithaca, NY, USA.

2

On leave from FNAL, Batavia, IL, USA.

3

On leave from Weizmann Institute, Rehovot, Israel.

4

On leave from the University of Michigan, Ann Arbor, MI, USA.

5

Now at SLAC, Stanford, CA, USA.

6

Now at mop Bremen, Germany.

7

Supported by the Deutsches Bundesministerium für Forschung und Technologie.

8

Supported by the UK Science Research Council.

9

Supported by the Minerva Gesellschaft für die Forschung mbH, Munich, Germany.

10

Supported in part by the US Department of Energy contract WY-76-C-02-0881.

View full text