Persistent Fine-Tuning in Supersymmetry and the NMSSM
| dc.creator | Schuster, Philip C. | |
| dc.creator | Toro, Natalia | |
| dc.date | 2005-12-15 | |
| dc.date.accessioned | 2026-07-07T06:54:15Z | |
| dc.date.available | 2026-07-07T06:54:15Z | |
| dc.description | We examine the use of modified Higgs sectors to address the little hierarchy problem of supersymmetry. Such models reduce weak-scale fine-tuning by allowing lighter stops, but they retain some fine-tuning independent of the Higgs. The modified Higgs sector can also introduce model-dependent tunings. We consider the model-independent constraints on naturalness from squark, gluino, chargino and neutralino searches, as well as the model-dependent tuning in the PQ- and R-symmetric limits of the NMSSM, where cascade decays or additional quartic interactions can hide a Higgs without relying on heavy stops. Obtaining viable electroweak symmetry breaking requires a tuning of $\sim 1-10%$ in the PQ limit. A large A-term is also necessary to make charginos sufficiently heavy, and this introduces an additional weak-scale tuning of $\sim 10%$. The R-symmetric limit requires large marginal couplings, a large singlet soft mass, and a tuning of $\sim 5-10%$ to break electroweak symmetry. Hiding MSSM-like Higgs states below $\approx 112$ GeV requires additional tunings of A-terms at the $\sim 1-10%$ level. Thus, although the NMSSM has rich discovery potential, it suffers from a unique fine-tuning problem of its own. | |
| dc.description | 10 pages, 6 figures, 2 tables | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0512189 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0512189 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/105871 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Persistent Fine-Tuning in Supersymmetry and the NMSSM | |
| dc.type | text |