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Title: The fully differential top decay distribution

We write down the four-dimensional fully differential decay distribution for the top quark decay t → Wb → ℓνb. 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.
Authors:
 [1] ;  [2] ;  [3] ;  [2]
  1. Univ. of Granada (Spain). Dept. of Theoretical and Cosmic Physics
  2. Univ. of Pittsburgh, PA (United States). Dept. of Physics and Astronomy
  3. CSIC-Univ. of Valencia, Paterna (Spain). Inst. of Corpuscular Physics
Publication Date:
Grant/Contract Number:
SC0007914; FPA 2016-78220-C3-1-P; FPA2015-65652-C4-1-R; FPA 2013-47836-C3-2-P; FQM-101; PROMETEO/2010/021; PITN-GA-2012-316704
Type:
Published Article
Journal Name:
European Physical Journal. C, Particles and Fields
Additional Journal Information:
Journal Volume: 77; Journal Issue: 3; Journal ID: ISSN 1434-6044
Publisher:
Springer
Research Org:
Univ. of Pittsburgh, PA (United States); Univ. of Granada (Spain); CSIC-Univ. of Valencia, Paterna (Spain)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); Ministry of Economy and Competitiveness (MINECO) (Spain); Regional Government of Andalusia; Generalitat Valenciana; European Commission (EC)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1348965
Alternate Identifier(s):
OSTI ID: 1368400