New Tests for Quark and Lepton Substructure

@article{Eichten1983NewTF,
  title={New Tests for Quark and Lepton Substructure},
  author={Estia J. Eichten and Kenneth D. Lane and Michael E. Peskin},
  journal={Physical Review Letters},
  year={1983},
  volume={50},
  pages={811-814}
}
If quarks and leptons are composite at the energy scale ..lambda.., the strong forces binding their constituents induce flavor-diagonal contact interactions, which have significant effects at reaction energies well below ..lambda... Consideration of their effect on Bhabha scattering produces a new, stronger bound on the scale of electron compositeness: ..lambda..>750 GeV. Collider experiments now being planned will be sensitive to ..lambda..approx.1--5 TeV for both electrons and light quarks. 

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