DOI 10.1007/s100529901082
Measurement of helicity parameters in top quark decay
Ch.A. Nelson - A.M. Cohen
Department of Physics, State University of New York at Binghamton, Binghamton, NY 13902-6016, USA
Received: 12 November 1998 / Published online: 27 April 1999
Abstract
It is important to be able to quantitatively assay future
measurements of competing observables consistent with the
gV-A coupling predictions for
decay, so plots of the values of
these helicity parameters are given in terms of a " (V-
A) + Additional Lorentz Structure". Three phase-type
ambiguities are shown to exist, but measurement of the
sign of the large interference between the W
longitudinal/transverse amplitudes will resolve two
of them. The large mb effects in both bL and bR
amplitudes from some couplings demonstrate that it is
less model dependent to measure helicity parameters,
instead of setting limits on some arbitrary subset of
coupling constants.
Author for correspondance: cnelson@bingvmb.cc.binghamton.edu
Copyright Springer-Verlag
