Against Tachyophobia
| dc.creator | Ellis, John | |
| dc.creator | Giedt, Joel | |
| dc.creator | Lebedev, Oleg | |
| dc.creator | Olive, Keith | |
| dc.creator | Srednicki, Mark | |
| dc.date | 2008-06-23 | |
| dc.date.accessioned | 2026-07-07T11:51:55Z | |
| dc.date.available | 2026-07-07T11:51:55Z | |
| dc.description | We examine the possible extension of the parameter space of the minimal supersymmetric extension of the Standard Model (MSSM), as expressed via the renormalization-group equations in terms of universal soft supersymmetry-breaking terms at the unification scale, to include tachyonic input scalar masses. Many models with negative masses-squared for scalars at the unification scale may be viable because the small sizes of the masses-squared allow them to change signs during the renormalization-group evolution to the electroweak scale. However, in many cases, there is, in addition to the electroweak vacuum, a much deeper high-scale vacuum located along some F- and D-flat direction in the effective potential for the MSSM. We perform a numerical search for such vacua in both the CMSSM and the NUHM. We discuss the circumstances under which the existence of such a deep charge- and color-breaking vacuum is consistent with standard cosmology. A crucial role is played by the inflation--induced scalar masses, whereas thermal effects are often irrelevant. | |
| dc.description | 24 pages, 4 figures | |
| dc.identifier | https://arxiv.org/abs/0806.3648 | |
| dc.identifier | http://arxiv.org/abs/0806.3648 | |
| dc.identifier | Phys.Rev.D78:075006,2008 | |
| dc.identifier | doi:10.1103/PhysRevD.78.075006 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/204060 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Against Tachyophobia | |
| dc.type | text |