1995/11/29 by Herbi K. Dreiner, Herbi Dreiner, Dreiner, Herbi +3
Physics and Astronomy · #Black Holes and Theoretical Physics #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9511444
18 pages, figures are available by fax from H. Dreiner at [email protected] or [email protected]
arxiv created 1995/11/29 · openalex publication_date 1995/11/29 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present the complete 2-loop renormalization group equations of the supersymmetric standard model. We thus explicitly include the full set of R -parity violating couplings, including κiLiH2. We use these equations to do a first study of (a) gauge coupling unification, (b) bottom-tau unification, (c) the fixpoint structure of the top quark Yukawa coupling, and (d) two-loop bounds from perturbative unification. We find significant shifts which can be larger than the effect from the top quark Yukawa coupling. The value of α3(MZ) can change by ±5%. The tanβ region for bottom-tau unification and for the top quark IR quasi fixed point structure is significantly increased. For heavy scalar fermion masses \calO(1\tev) the limits on the ΔL\not=0 operators from perturbative unification are competitive with the indirect laboratory bounds. The two-loop correction to the bound on the ΔB\not=0 opertor is +15% .