DØ Diboson Subgroup


Conveners: John Ellison, Taka Yasuda

The self-interaction of the gauge bosons (the W, the Z, and the photon) is a consequence of the non-Abelian gauge symmetry of the Standard Model. The gauge boson self-interactions appear as vertices involving three gauge bosons, and result in the production of pairs of bosons. The study of diboson production thus directly tests the predicted Standard Model couplings. Observations of anomalous couplings would be an indication of new physics. DØ sets limits on anomalous couplings using W-gamma, Z-gamma, WW and WZ final states.

DØ Results / Plots

The following is a table of our results in each of the diboson production channels.
Shown in the second column are the trilinear couplings measured in ecah channel.

Our most recent results are the WZ -> e nu ll search, the study of WW/WZ -> mu nu jj and new combined limits on the anomalous couplings (see the relevant web page in the table below).

 
Wgamma results WWgamma coupling
Z gamma results ZZgamma and Zgammagamma coupings
WW/WZ (l nu j j) results WWgamma and WWZ couplings
WW (l nu l nu) results WWgamma and WWZ couplings
WZ (l nu l l) results WZ coupling
WWgamma/WWZ Combined Fit WWgamma and WWZ couplings
from fit to all channels
DØ  + LEP combined results

Results of the combination of DØ and LEP limits on anomalous WWg and WWZ couplings (Winter 98) can be found here: DØ Note 3437 .  These were updated in Summer 98, see DØ Note 3532 . The latest plots (prepared for Moriond 99) can be found here:
Delta kappa (D0 + LEP)
lambda (D0 + LEP)
 

Publications

Here is the latest list of D0 publications on diboson production and anomalous couplings:

  1. Limits on the Anomalous ZZgamma and Zgammagamma Couplings in pbarp Collisions at sqrt s = 1.8 TeV

    2. Phys. Rev. Letters {75} 1028 (1995) PDF (Copyright by the APS)
    FERMILAB PUB-95/042-E PS
     
  2. Search for W Boson Pair Production in pbarp Collisions at sqrt s = 1.8 TeV

    3. Phys. Rev. Letters {75} 1023 (1995) PDF (Copyright by the APS)
    FERMILAB PUB-95/044-E PS
     
  3. Measurement of the WWgamma Gauge Boson Couplings in pbarp Collisions at sqrt s = 1.8 TeV

    4. Phys. Rev. Letters {75} 1034 (1995) PDF (Copyright by the APS)
    FERMILAB PUB-95/101-E PS
     
  4. Search for Anomalous WW and WZ Production in pbarp Collisions at sqrt s=1.8 TeV

    5. Phys. Rev. Letters {77} 3303 (1996). PDF (Copyright by the APS)
    FERMILAB-PUB-96/115-E PS
     
  5. Limits on Anomalous WWgamma Couplings from pbar --> W gamma + X Events at sqrt s = 1.8 TeV

    6. Phys. Rev. Lett. 78, 3634 (1997) PDF (Copyright by the APS)
    FERMILAB-PUB-96/434-E, hep-ex/9612002 PS
     
  6. Study of the ZZg and Zgg Couplings in Z(nunu)g Production.

    7. Phys. Rev. Letters 78, 3640 (1997) PDF (Copyright by the APS)
    FERMILAB PUB-97/047-E, hep-ex/9702011 PS
     
  7. Studies of Gauge Boson Pair Production and Trilinear Couplings.

    8. Phys. Rev. D56, 6742 (1997) PDF (Copyright by the APS)
    Fermilab-Pub-97/088-E, hep-ex/9704004 PS
     
  8. Limits on WWZ and WWgamma couplings from pbarp-> e nu j j X events at sqrt s = 1.8 TeV

    9. Phys. Rev. Letters {79} 1441 (1997) PDF (Copyright by the APS)
    FERMILAB PUB-97/136-E, hep-ex/9705010 PS
     
  9. Zgamma Production in pbarp Collisions at sqrt(s)=1.8TeV and Limits on Anomalous ZZgamma and Zgammagamma Couplings.

    10. Phys. Rev. D {57} 3817 (1998) PDF (Copyright by the APS)
    FERMILAB PUB-97/363-E, hep-ex/9710031. PS
     
  10. Limits on WWgamma and WWZ Couplings from W Boson Pair Production.

    11. Phys. Rev D58, Rapid Communications 051101 (1998) PDF (Copyright by the APS)
    FERMILAB PUB-98-076-E, hep-ex/9803004. PS
     
  11. Limits on Anomalous WWg and WWZ Couplings.

    12. Phys. Rev. D Rapid Communications {D58} 31102 (1998) PDF (Copyright by the APS)
    FERMILAB PUB-98-094-E, hep-ex/9803017. PS
     
  12. Studies of WW and WZ Production and Limits on Anomalous WWgamma and WWZ Couplings.

    13. Phys. Rev. D {60} 072002 (1999) PDF (Copyright by the APS)
    FERMILAB PUB-99/139-E, hep-ex/9905005. PS
     
  13. Limits on Anomalous WWgamma and WWZ Couplings from WW/WZ ->evjj Production

    14. Phys. Rev. D {62}, 052005 (2000) PDF (Copyright by the APS)
    hep-ex/9912033. PS
Review article

Study of Trilinear Gauge Boson Couplings at the Tevatron Collider
by John Ellison and Jose Wudka, hep-ph/9804322, published in Annual Review of Nuclear and Particle Science 48:33 (1998)

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Last modified: Tue May 25 09:09:59 PDT 1999