The Tau Lepton and the Search for New Elementary Particle Physics

Abstract

This Fifth International WEIN Symposium is devoted to physics beyond the standard model. This talk is about tau lepton physics, but I begin with the question: do we know how to find new physics in the world of elementary particles? This question is interwoven with the various tau physics topics. These topics are: searching for unexpected tau decay modes; searching for additional tau decay mechanisms; radiative tau decays; tau decay modes of the W , B, and D; decay of the Z 0 to tau pairs; searching for CP violation in tau decay; the tau neutrino, dreams and odd ideas in tau physics; and tau research facilities in the next decades.

τ weak magnetic dipole moment

“…However, for q 2 ≃ M 2 Υ at B-factories, some promising ideas may help to establish bounds on the magnetic form factor at B-factories at levels where BSM effects could appear. As Martin Perl [18] stated many decades ago in Dreams and odd ideas in tau research: "... It would be very nice to measure µ τ with enough precision to check this (the Schwinger term α/2π), as it was checked for the e and the µ years ago.…”