Stronger neutrino interactions at extremely high energies and the muon anomalous magnetic moment
III. Physikalisches Institut, RWTH Aachen, 52056 Aachen, Germany
Revised: 13 November 2001
Published online: 11 January 2002
A specific model of parity-conserving lepton substructure is considered. We show that a positive-definite contribution to the muon (g - 2)/2 at the possible level of about 4 × 10-9 can be related to a significant increase in the interaction cross section for cosmic-ray neutrinos with energies above about 1019 eV. The additional cross section at ~ 1020 eV is calculated to be ~ 10-29 cm2, which is about 100 times the standard weak-interaction cross section. The model involves an extremely massive, neutral lepton, with mL ≅ 2 × 106 GeV fixed by the new contribution to (g - 2)/2.
© Società Italiana di Fisica, Springer-Verlag, 2002