[SUNY BING 10/24/04] hep-ph/0400000 ON AN INTENSITY-RATIO EQUIVALENCE FOR TWO TOP-QUARK DECAY COUPLINGS

For the t → W+b decay mode, an intensity-ratio equivalence for two distinct Lorentzinvariant couplings is shown to be a consequence of symmetries of tWb-transformations. Explicit tWb-transformations, A+ = M ASM , P ASM , B ASM connect the four standard model’s (SM) helicity amplitudes, ASM (λW+, λb), and the amplitudes A+ (λW+ , λb) in the case of an additional chiral-tensorial-coupling of relative strength Λ+ = EW/2 ∼ 53GeV . Such a coupling will arise if there is a large tR → bL chiral weak-transition-moment. Two commutator plus anti-commutator symmetry algebras are generated from M,P,B. Using these transformations, the associated mass scales are related to the SM’s electroweak scale vEW ∼ 246GeV .