2005/06/30 by Mariana Frank, İsmail Turan, Ismail Turan · 40 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Chargino #Geometry #Gluino #Gluon #Neutralino #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quark #Scalar (mathematics) #Supersymmetry #hep-ph
paper · pdf · doi:10.1103/physrevd.72.035008
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 72(3) (American Physical Society) · 40 pages, 11 figures, uses axodraw.sty, references added, a paragraph about large tanbeta values added, published version
openalex publication_date 2005/08/18 · arxiv created 2005/08/29 · arxiv updated 2011/03/23 · openalex created_date 2017/03/16 · openalex updated_date 2026/08/05
We analyze top-quark flavor violating decays into a charm quark and a gluon, photon, or Z boson in a supersymmetric model incorporating left-right symmetry. We include loop calculations involving contributions from scalar quarks, gluinos, charginos, and neutralinos. We perform the calculations first assuming the minimal (flavor-diagonal) scalar quark scenario and then allowing for arbitrary mixing between the second and the third generation of scalar quarks, in both the up and the down sectors. In each case we present separately the contributions from gluino, chargino, and neutralino loops and compare their respective strengths. In the flavor-diagonal case, the branching ratio cannot exceed 10^\ensuremath-5 (10^\ensuremath-6) for the gluon (photon/Z boson); while for the unconstrained (flavor-nondiagonal) case the same branching ratios can reach almost 10^\ensuremath-4 for the gluon, 10^\ensuremath-6 for the photon, and 10^\ensuremath-5 for the Z boson, all of which are slightly below the expected reach of LHC.