Top squarks and bottom squarks in the minimal supersymmetric standard model with complex parameters

Alfred Bartl, Stefan Hesselbach, Keisho Hidaka, Thomas Kernreiter, Werner Porod

    Veröffentlichungen: Beitrag in FachzeitschriftArtikelPeer Reviewed

    Abstract

    We present a phenomenological study of top squarks (t~1,2) and bottom squarks (b~1,2) in the minimal supersymmetric standard model (MSSM) with complex parameters At, Ab, œ, and M1. In particular we focus on the CP phase dependence of the branching ratios of t¯1,2 and b¯1,2 decays. We give the formulas of the two-body decay widths and present numerical results. We find that the effect of the phases on the t~1,2 and b~1,2 decays can be quite significant in a large region of the MSSM parameter space. This could have important implications for t~1,2 and b~1,2 searches and the MSSM parameter determination in future collider experiments. We have also estimated the accuracy expected in the determination of the parameters of t~i and b~i by a global fit of the measured masses, decay branching ratios, and production cross sections at e+e- linear colliders with polarized beams. Analyzing two scenarios, we find that the fundamental parameters apart from At and Ab can be determined with errors of 1% to 2%, assuming an integrated luminosity of 1 ab-1 and a sufficiently large center of mass system (c.m.s.) energy to produce also the heavier t~2 and b~2 states. The parameter At can be determined with an error of 2-3%, whereas the error on Ab is likely to be of the order of 50%.
    OriginalspracheEnglisch
    Aufsatznummer035003
    Seitenumfang18
    FachzeitschriftPhysical Review D
    Jahrgang70
    Ausgabenummer3
    DOIs
    PublikationsstatusVeröffentlicht - 2004

    ÖFOS 2012

    • 103036 Theoretische Physik

    Zitationsweisen