Probing Anomalous Top-Couplings through the Final Lepton Angular and Energy Distributions at Polarized NLC

2001/04/11 by Zenro Hioki, Hioki, Zenro
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #hep-ex #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/0104105

9 pages, Latex, one latex-figure + two eps-figures, Talk at Theory Meeting on Physics at Linear Colliders, March 15 - 17, 2001, KEK, Japan

arxiv created 2001/04/11 · arxiv updated 2009/11/30

Abstract

The angular and energy distributions of the final lepton in e ebar t tbar --> l^+- X at next linear colliders (NLC) are analyzed a model-independent way for arbitrary longitudinal beam polarizations as sensitive tests of possible anomalous top-quark couplings. The angular-energy distribution is expressed as a combination of independent functions of the angle and the energy, where each anomalous parameter is the coefficient of an individual term. Every parameter could be thereby determined simultaneously via the optimal-observable procedure. On the other hand, anomalous tbW couplings totally decouple from the angular distribution, which enables us to study t-tbar-gamma/Z couplings exclusively.

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