On Measurement of Helicity Parameters in Top Quark Decay

Abstract

To enable an evaluation of future measurements of the helicity parameters for " t --> W b " decay in regard to " T_FS violation", this paper considers the effects of an additional pure-imaginary coupling, (i g/2 Lambda) or (i g), associated with a specific, single additional Lorentz structure, i = S, P, S + P, ... Sizable " T_FS violation" signatures can occur for low-effective mass scales (< 320 GeV), but in most cases can be more simply excluded by 10% precision measurement of the probabilities P(W_L) and P(b_L). Signatures for excluding the presence of " T_FS violation" associated with the two dynamical phase-type ambiguities are investigated.

15 pages, 1 table, 7 figures, no macros

Cited by in corpus (6)

• The Top Quark Decay Vertex in Standard Model Extensions
• Supersymmetric effects in top quark decay into polarized W-boson
• Studying top quark decay into the polarized W-boson in the TC2 model
• Use of W-Boson Longitudinal-Transverse Interference in Top Quark Spin-Correlation Functions
• Three Numerical Puzzles and the Top Quark's Chiral Weak-Moment
• Use of W-Boson Longitudinal-Transverse Interference in Top Quark Spin-Correlation Functions: II