Use of W-Boson Longitudinal-Transverse Interference in Top Quark Spin-Correlation Functions: II

Abstract

This continuation of the derivation of general beam-referenced stage-two spin-correlation functions is for the analysis of top-antitop pair-production at the Tevatron and at the Large Hadron Collider. Both the gluon-production and the quark-production contributions are included for the charged-lepton-plus-jets reaction p p or p bar{p} --> t bar{t} --> (W^+ b)(W^- bar{b}) --> (l^{+} nu b)(W^- bar{b}). There is a simple 4-angle beam-referenced spin-correlation function for determination of the relative sign of, or for measurement of a possible non-trivial phase between the two dominant helicity amplitudes for t --> W^{+} b decay. There is an analogous function and tests for bar{t} --> W^{-} bar{b} decay. This signature requires use of the (t bar{t}) c.m.-energy of the hadronically decaying W-boson, or the kinematically equivalent cosine of the polar-angle of W-boson emission in the anti-top (top) decay frame. Spinors and their outer-products are constructed so that the helicity-amplitude phase convention of Jacob & Wick can be used throughout for the fixing of the signs associated with this large W-boson longitudinal-transverse interference effect.

arXiv commentContinuation of hep-ph/0506240 to include gluon-production contribution; 3 "postscript" figures. Equation numbers as in published-on-line EPJC

References in corpus (11)

• Observation of Top Quark Production in Pbar-P Collisions
• Top quark pair production and decay at hadron colliders
• Finite-Width Effects in Top Quark Production at Hadron Colliders
• Helicity of the W Boson in Lepton+Jets ttbar Events
• Top Quark Production and Decay at Next-to-leading Order in $e^{+}{e}^{-}$ Annihilation
• General Tests for t ---> W+ b couplings at Hadron Colliders
• Measurement of the W Boson Polarization in Top Decay at CDF at s**(1/2) = 1.8 TeV
• On Measurement of Helicity Parameters in Top Quark Decay
• Use of W-Boson Longitudinal-Transverse Interference in Top Quark Spin-Correlation Functions
• Use of Lambda_b Polarimetry in Top Quark Spin-Correlation Functions
• Three Numerical Puzzles and the Top Quark's Chiral Weak-Moment

Cited by in corpus (1)

• Lepton distribution as a probe of new physics in production and decay of the t quark and its polarization