PT Journal
AU Aguilar-Saavedra, JA
   Boudreau, J
   Escobar, C
   Mueller, J
TI The fully differential top decay distribution
SO European Physical Journal C
JI Eur. Phys. J. C
PY 2017
BP 200
EP 8pp
VL 77
IS 3
DI 10.1140/epjc/s10052-017-4761-5
LA English
AB We write down the four-dimensional fully differential decay distribution for the top quark decay t -> Wb -> l nu b. We discuss how its eight physical parameters can be measured, either with a global fit or with the use of selected one-dimensional distributions and asymmetries. We give expressions for the top decay amplitudes for a general tbW interaction, and show how the untangled measurement of the two components of the fraction of longitudinal W bosons – those with b quark helicities of 1/2 and -1/2, respectively – could improve the precision of a global fit to the tbW vertex.
ER