Some issues in soft SUSY-breaking terms from dilaton/moduli sectors
| dc.creator | Brignole, A. | |
| dc.creator | Ibanez, L. E. | |
| dc.creator | Munoz, C. | |
| dc.creator | Scheich, C. | |
| dc.date | 1995-08-08 | |
| dc.date | 1996-07-26 | |
| dc.date.accessioned | 2026-07-07T12:03:14Z | |
| dc.date.available | 2026-07-07T12:03:14Z | |
| dc.description | We study the structure of the soft SUSY-breaking terms obtained from some classes of 4-D strings under the assumption of dilaton/moduli dominance in the process of SUSY-breaking. We generalize previous analysis in several ways and in particular consider the new features appearing when several moduli fields contribute to SUSY breaking (instead of an overall modulus $T$). Some qualitative features indeed change in the multimoduli case.A general discussion for symmetric Abelian orbifolds as well as explicit examples are given. Certain general sum-rules involving soft terms of different particles are shown to apply to large classes of models. Unlike in the overall modulus $T$ case, gauginos may be lighter than scalars even at the tree-level. However, if one insists in getting that pattern of soft terms, these sum rules force some of the scalars to get negative mass$^2$. These tachyonic masses could be a problem for standard model 4-D strings but an advantage in the case of string-GUTs.We also discuss the possible effects of off-diagonal metrics for the matter fields which may give rise to flavour-changing neutral currents. Different sources for the bilinear $B$ soft term are studied. It is found that the Giudice-Masiero mechanism for generating a ``$μ$-term'', as naturally implemented in orbifolds, leads to the prediction $|tgβ|=1$ at the string scale, independently of the Goldstino direction. | |
| dc.description | 27 pages, no figures, Latex; version to appear in Z. Phys. C (some changes in the discussion on gaugino versus scalar masses in sections 2 and 5, minor corrections elsewhere) | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9508258 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9508258 | |
| dc.identifier | Z.Phys.C74:157-170,1997 | |
| dc.identifier | doi:10.1007/s002880050379 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/207711 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Some issues in soft SUSY-breaking terms from dilaton/moduli sectors | |
| dc.type | text |