ar X iv : h ep - p h / 97 05 23 6 v 2 8 M ay 1 99 7 OITS - 630 Contact Interaction
نویسنده
چکیده
We reexamine the contact interaction hypothesis for excess high-Q events seen at HERA in ep → eX scattering. We consider the most general structure of contact interactions insisting on SU(3)C×SU(2)L×U(1)Y invariance. Apart from constraints for ee → qq̄ , Drell-Yan and atomic parity violation experiments, we find stringent constraints from neutrino deep inelastic data, provided one assumes lepton universality. A possible choice of contact terms that escape present bounds is still possible, althought new data from FERMILAB and LEP should further constrain such a possibility. PACS numbers: Typeset using REVTEX
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ar X iv : h ep - p h / 97 05 45 5 v 1 2 8 M ay 1 99 7 LECTURE 1 Spectral Fluctuations of the QCD Dirac Operator
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