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New directions for top quark polarization in the t-channel process

J. A. Aguilar-Saavedra1,2 and S. Amor dos Santos3

  • 1Departamento de Física Teórica y del Cosmos, Universidad de Granada, E-18071 Granada, Spain
  • 2PH-TH Department, CERN, CH-1211 Geneva 23, Switzerland
  • 3LIP, Departamento de Física da Universidade de Coimbra, P-3004-516 Coimbra, Portugal

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Phys. Rev. D 89, 114009 – Published 6 June, 2014

DOI: https://doi.org/10.1103/PhysRevD.89.114009

Abstract

We define three orthogonal axes to investigate the top-quark polarization in the t-channel single-top process. We provide expressions for the polarization in these axes in terms of anomalous Wtb couplings. It is found that the polarizations in the two axes orthogonal to the spectator quark axis are very sensitive to an anomalous coupling involving a b¯LσμνtR dipole term. In particular, an asymmetry based on the polarization normal to the production plane is more sensitive to the imaginary part of this coupling than previously studied observables.

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Phys. Rev. D 89, 114009– Published 6 June, 2014
  • Received 9 April 2014

© 2014 American Physical Society

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