Contact interaction explanation of HERA events and SU(3)C × SU(2)L × U(1)Y invariance Academic Article uri icon


  • We reexamine the contact interaction hypothesis for excess high-Q 2 events seen at HERA in e + p - → e + X 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 e + e - → 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. © 1997 Elsevier Science B.V.

published proceedings

  • Physics Letters B

author list (cited authors)

  • Deshpande, N. G., Dutta, B., & He, X

citation count

  • 10

complete list of authors

  • Deshpande, NG||Dutta, B||He, Xiao-Gang

publication date

  • September 1997