Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1994-03-22
Phys.Rev.D50:R39,1994; Erratum-ibid.D51:3974,1995
Physics
High Energy Physics
High Energy Physics - Phenomenology
PRL-TH-94/8 and TIFR/TH/94-7, 15 pages, LaTeX
Scientific paper
10.1103/PhysRevD.50.R39 10.1103/
The 1-loop evolution of couplings in the minimal supersymmetric standard model, extended to include baryon nonconserving $(B\!\!\!/)$ operators through explicit $R$-parity violation, is considered keeping only $B\!\!\!/$ superpotential terms involving the maximum possible number of third generation superfields. If all retained Yukawa couplings $Y_i$ are required to remain in the perturbative domain $(Y_i < 1)$ upto the scale of gauge group unification, upper bounds ensue on the magnitudes of the $B\!\!\!/$ coupling strengths at the supersymmetry breaking scale, independent of the model of unification. They turn out to be similar to the corresponding fixed point values reached from a wide range of $Y_i$ (including all $Y_i$ greater than unity) at the unification scale. The coupled evolution of the top and $B\!\!\!/$ Yukawa couplings results in a reduction of the fixed point value of the former.
Brahmachari Biswajoy
Roy Probir
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