https://doi.org/10.1140/epjc/s10052-017-4761-5
Regular Article - Theoretical Physics
The fully differential top decay distribution
1
Departamento de Física Teórica y del Cosmos, Universidad de Granada, 18071, Granada, Spain
2
Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA, USA
3
Instituto de Física Corpuscular, CSIC-Universitat de València, 46890, Paterna, Spain
* e-mail: jaas@ugr.es
Received:
16
February
2017
Accepted:
16
March
2017
Published online:
29
March
2017
We write down the four-dimensional fully differential decay distribution for the top quark decay . 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
, respectively – could improve the precision of a global fit to the tbW vertex.
© The Author(s), 2017