1998/10/20 by M. K. Parida
Physics and Astronomy · #Black Holes and Theoretical Physics #Noncommutative and Quantum Gravity Theories #Particle physics theoretical and experimental studies #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.58.115006
published as Phys.Rev. D58 (1998) 115006 · 41 pages, Latex, with five figures, To appear in Phys.Rev.D58(1998)
openalex publication_date 1998/10/20 · arxiv created 1998/10/27 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In the context of a viable, supersymmetric, preon model, it has been shown by Babu and Pati that the unity of forces can well occur at the level of preons near the Planck scale. This preonic approach to unification is explored further in this paper with the inclusion of threshold effects which arise due to the spreading of masses near the scale of supersymmetry (MS=1TeV) and the metacolor scale (\ensuremathΛM=1011GeV). These effects, which were ignored in earlier work, are found to have marked consequences on the running and unification of the relevant couplings, leading to new possibilities for flavor color as well as metacolor gauge symmetries. In particular, allowing for seemingly reasonable threshold effects, it is found that the metacolor gauge symmetry, GM is either SU(6)M or SU(4)M [rather than SU(5)M] and the corresponding flavor-color gauge symmetry is either SU(2)L\ifmmode×\else\texttimes\fiU(1)R\ifmmode×\else\texttimes\fiSU(4)L+RC [for GM=SU(6)M] or even just the standard model symmetry SU(2)L\ifmmode×\else\texttimes\fiU(1)Y\ifmmode×\else\texttimes\fiSU(3)C [for GM=SU(6)M or SU(4)M]. The prospects of other preonic gauge symmetries are also investigated.