literature

Constraints on four Fermi contact interactions from low-energy electroweak experiments

Jul, 1997
26 pages
Published in:
  • Eur.Phys.J.C 5 (1998) 155-165
e-Print:
Report number:
  • KEK-TH-521,
  • KEK-PREPRINT-97-97

Citations per year

1997200420112018202402468
Abstract: (arXiv)
We investigate the constraints on four-Fermi contact interactions from low-energy lepton-quark and lepton-lepton scattering experiments --- polarization asymmetries in electron (muon)-nucleon scattering experiments, cesium and thallium atom parity violation measurements, neutrino-nuclei and neutrino-electron scattering experiments. These constraints are then combined by assuming the lepton and quark universalities and SU(2)*U(1) gauge invariance of the contact interaction, which leave independent six lepton-quark and three pure-leptonic interactions.Impacts of these constraints on models with an additional Z-boson are briefly discussed. We also present updates of the low-energy constraints on the S and T parameters.
  • four-fermion interaction
  • electroweak interaction: validity test
  • effective Lagrangian
  • helicity: amplitude analysis
  • lepton nucleus: interaction
  • polarization: asymmetry
  • atomic physics
  • parity: violation
  • neutrino quark: scattering
  • neutrino electron: scattering