Spin Effects in Processes of Single Top Quark Production at Hadron Colliders

Abstract

We investigate spin properties of single top quark production at hadron colliders. Based on an analogy with single top production and polarized top quark decay, we reproduce in a simple way the results by G.Mahlon and S.Parke on the existence of preferred axes for the decomposition of the top quark spin. For the W*- and W-g fusion production modes these axes are related to the down-type quark momentum. The proposed method allows finding kinematical conditions for the observation of top quark polarization in a third process that contributes to single top production and is important at LHC energies, the tW-process, in which spin effects are smeared out by the contribution of diagrams with a QCD gtt-vertex. A simple Monte-Carlo analysis of spin correlations for the tW-process with subsequent top decay is given as an illustration.

14 pages, latex

References in corpus (4)

• Single Top Production as a Window to Physics Beyond the Standard Model
• The t W- Mode of Single Top Production
• Single Top Quark Production at the LHC: Understanding Spin
• Single top quark tW+X production at the LHC: a closer look

Cited by in corpus (14)

• Physics Interplay of the LHC and the ILC
• Review of Top Quark Physics
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• Multivariate searches for single top quark production with the D0 detector
• A study of top polarization in single-top production at the LHC
• Angular correlations in t-channel single top production at the LHC
• Review of Properties of the Top Quark from Measurements at the Tevatron
• The Single Top Quark Physics
• Single production of sleptons with polarized tops at the Large Hadron Collider
• Modeling of anomalous Wtb interactions using subsidiary fields
• Observation of Single Top Quark Production
• Symbolic expressions for fully differential single top quark production cross section and decay width of polarized top quark in the presence of anomalous Wtb couplings
• Probing top quark anomalous moments in $W$ boson associated single top quark production at the LHC using polarization and spin correlation