LEPTOQUARKS

• Basics

  will be available soon!

• H1 papers
  • 1. Search for Lepto-Quarks, Lepto-Gluons and excited leptons at HERA
    N. P. B396 (1993) 3.

    2. A Search for Leptoquarks and Squarks at HERA

    DESY-94-154 / Z.Phys. C64(1994)545

    3. Leptoquarks and Compositeness Scales from a Contact Interaction Analysis of Deep Inelastic e(+-)p Scattering at HERA

    DESY-95-079 / P.L. B353(1995)578

    4. A Search for Leptoquarks at HERA

    DESY-95-233 / P.L. B369 (1996) 173

    5. Observation of Events at Very High Q^2 in ep Collisions at HERA

    DESY-97-024 / submitted to Zeit f. Phys.

• ZEUS papers
  • 1. Search for Leptoquarks with the ZEUS Detector
    DESY-93-017, Published in Phys.Lett.B306 (1993) 173

    2. Search for Lepton Flavor Violation in ep Collisions at 300 GeV Center of Mass Energy

    DESY-96-161, Published in Z.Phys. C73 (1997) 613

    3. Comparison of ZEUS Data with Standard Model Predictions for $e^+ P \rightarrow e^+ X$ Scattering at High x and Q^2

    DESY-97-025, Published in Z.Phys.C74 (1997) 207

• TeVatron (recent) papers
  • COMBINED LIMITS ON FIRST GENERATION LEPTOQUARKS FROM THE CDF AND D0 EXPERIMENTS,
    CDF and D0 Collaborations, Oct 1998. 9 pp
    (hep-ex/9810015)

    SEARCH FOR CHARGE 1/3 THIRD GENERATION LEPTOQUARKS IN P ANTI-P COLLISIONS AT S**(1/2) = 1.8-TEV

    D0 Collaboration (B. Abbott et al.) Mar 1998. 6pp.

    (hep-ex/9803009)

    SEARCH FOR FIRST GENERATION SCALAR LEPTOQUARK PAIRS IN P ANTI-P COLLISIONS AT S**(1/2) = 1.8-TEV.

    D0 Collaboration (B. Abbott et al.) Oct 1997. 14pp

    (hep-ex/9710032)

    Published in Phys.Rev.Lett.80:2051-2056,1998

    SECOND GENERATION LEPTOQUARK SEARCH IN P ANTI-P COLLISIONS AT S**(1/2) = 1.8-TEV

    D0 Collaboration (S. Abachi et al.) Jul 1995. 18pp

    (hep-ex/9507002)

    Published in Phys.Rev.Lett.75:3618-3623,1995

    SEARCH FOR FIRST GENERATION LEPTOQUARK PAIR PRODUCTION IN P ANTI-P COLLISIONS AT S**(1/2) = 1.8-TEV

    CDF Collaboration (F. Abe et al.) Aug 1997. 15pp

    (hep-ex/9708017)

    Published in Phys.Rev.Lett.79:4327-4332,1997

    SEARCH FOR THIRD GENERATION LEPTOQUARKS IN ANTI-P P COLLISIONS AT S**(1/2) = 1.8-TEV

    CDF Collaboration (F. Abe et al.) Dec 1996. 16pp

    Published in Phys.Rev.Lett.78:2906-2911,1997

    A SEARCH FOR SECOND GENERATION LEPTOQUARKS IN P ANTI-P COLLISIONS AT S**(1/2) = 1.8-TEV

    CDF Collaboration (F. Abe et al.) Mar 1995. 17pp

    Published in Phys.Rev.Lett.75:1012-1016,1995

• Indirect limits

• NLO calculations

     The cross sections for the formation of scalar resonances, 
     leptoquarks or squarks, in lectron/positron-proton collisions 
     at HERA are presented including next-to-leading order QCD
     corrections. Depending mildly on the mass of the resonances, the
     K-factors increase the production cross sections by up to 30% 
     if the target quarks are valence quarks. The QCD corrections to the
     partial decay widths of leptoquarks/squarks to leptons and quarks
     are small. The electron spectrum in the decays is softened
     nevertheless by perturbative gluon radiation at a level of 3.4 GeV
     for a leptoquark/squark mass of 200 GeV.