1995/09/13 by Carlos Muñoz, C. Muñoz, Muñoz, C.
Computer Science · Physics and Astronomy · #Constraint Satisfaction and Optimization #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th) #hep-ph #hep-th
paper · pdf · doi:10.48550/arxiv.hep-ph/9509290
13 pages, latex using World Scientific macro: sprocl.sty (appended at the end of the file), talk given at the International Workshop on "Elementary Particle Physics Present and Future", Valencia (Spain) June 5-9, 1995
arxiv created 1995/09/13 · openalex publication_date 1995/09/13 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study the structure of the soft SUSY-breaking terms obtained from large classes of 4-D Strings under the assumption of dilaton/moduli dominance in the process of SUSY-breaking. In particular, we first analyze in detail the dilaton-dominated limit because of its finiteness properties and phenomenological predictivity, and second, we consider the new features appearing when several moduli fields contribute to SUSY breaking. Although some qualitative features indeed change in the multimoduli case with respect to the dilaton dominance one, the most natural mass relations at low-energy ml < mq ≃ Mg are still similar. We also study the presence of tachyons pointing out that their possible existence may be, in some cases, an interesting advantage in order to break extra gauge symmetries. Finally, we find that the mechanism for generating a ``μ-term'' by the Kähler potential, as naturally implemented in orbifolds, leads to the prediction |tgβ|=1 at the String scale, independently of the Goldstino direction. In this connection, it is worth noticing that in the dilaton-dominated case we obtain the remarkable result that the whole SUSY spectrum is completely determined with no free parameters.