Infra – red soft universality
نویسندگان
چکیده
We show that in a special class of theories the commonly assumed universal form of the soft supersymmetry–breaking terms is approached in the infra–red limit. The resulting universal scalar mass and trilinear coupling are predicted in terms of the gaugino mass.
منابع مشابه
Universality and the sparticle spectrum
We calculate the particle spectrum of the SSM which follows from the assumption that the commonly assumed universal form of the soft supersymmetry–breaking terms is invariant under renormalisation. It is argued that this " strong " universality might be approached as an infra–red fixed point for the unified theory above the unification scale.
متن کاملLth 350 Dred, Universality and the Superparticle Spectrum *
Recent work on the use of dimensional reduction for the regularisation of non– supersymmetric theories is reviewed. It is then shown that there exists a class of theories for which a universal form of the soft supersymmetry breaking terms is invariant under renormalisation. It is argued that this universal form might be approached as an infra–red fixed point for the unified theory above the uni...
متن کاملDiffusion into infra - red and unitarization of the BFKL pomeron
The BFKL pomeron in perturbative QCD is plagued by the lack of unitarity and diffusion into the infra-red region of gluon virtualities. These two problems are intimately related. We perform numerical studies of the evolution equation proposed by Balitsky and Kovchegov which unitarizes the BFKL pomeron. We show how diffusion into the infra-red region is suppressed due to the emergence of a satur...
متن کاملInfra - red stability of Yukawa and soft - breaking fixed points
We investigate the infra-red stability of the fixed points in the evolution of the Yukawa couplings, A-parameters and soft scalar masses in a broad class of supersymmetric theories. We show that the issue of stability is essentially determined in all three cases by the eigenvalues of the same matrix. In a very wide range of physically interesting theories it follows that, in the asymptotically ...
متن کاملQuasi-infra-red fixed points and renormalisation group invariant trajectories for non-holomorphic soft supersymmetry breaking
In the MSSM the quasi-infra-red fixed point for the top-quark Yukawa coupling gives rise to specific predictions for the soft-breaking parameters. We discuss the extent to which these predictions are modified by the introduction of additional “non-holomorphic” soft-breaking terms. We also show that in a specific class of theories, there exists an RGinvariant trajectory for the “non-holomorphic”...
متن کامل