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:
- hep-ph/9707334 [hep-ph]
PDG: Limits for other
Report number:
- KEK-TH-521,
- KEK-PREPRINT-97-97
View in:
Citations per year
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
References(36)
Figures(0)