2009/08/31 by S. Groote, H. Liivat, I. Ots +2
Physics and Astronomy · #Black Holes and Theoretical Physics #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1140/epjc/s10052-010-1237-2
published as Eur.Phys.J.C66:271-281,2010 · 28 pages in LaTeX, including 7 encapsulated PostScript figures, published version
openalex publication_date 2010/01/12 · arxiv created 2010/04/15 · arxiv updated 2010/05/25 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
In searching for indications of new physics scalar particle and unparticle couplings in e+ e- → t t, we consider the role of transversely polarized initial beams at e+ e- colliders. By using a general relativistic spin density matrix formalism for describing the particles spin states, we find analytical expressions for the squared amplitude of the process with t or t polarization measured, including the anomalous coupling contributions. Thanks to the transversely polarized initial beams these contributions are first order anomalous coupling corrections to the Standard Model (SM) contributions. We present and analyse the main features of the SM and anomalous coupling contributions. We show how differences between SM and anomalous coupling contributions provide means to search for anomalous coupling manifestations at future e+ e- linear colliders.