Predictions of Neutralino Dark Matter Event Rates in Minimal Supergravity Unification
| dc.creator | Arnowitt, R. | |
| dc.creator | Nath, Pran | |
| dc.date | 1995-09-09 | |
| dc.date | 1995-09-13 | |
| dc.date.accessioned | 2026-07-07T11:47:44Z | |
| dc.date.available | 2026-07-07T11:47:44Z | |
| dc.description | A detailed analysis of dark matter event rates in minimal supergravity models (MSGM) is given. It is shown analytically that the lightest neutralino the ${{\tilde {Z}_{1}}}$ is the LSP over almost all of the parameter space, and hence the natural candidate for cold dark matter (CDM). The radiative breaking of $SU(2)\times U(1)$ constraints are shown to be crucial in determining the expected event rates. Approximate analytic formulae are obtained to determine the gaugino-higgsino content of the ${{\tilde{Z}_{1}}}$ particle.From this one can deduce the behavior of the event rates as one varies the SUSY soft breaking parameters and tan $β$. The constraint on the event rates due to the recently measured $b\rightarrow s+γ$ decay is calculated. It is seen that this data eliminates most of the parameter space where $μ$ (the Higgs mixing parameter) and $A_t$ (the t-quark cubic soft breaking parameter) have the same sign. Since the t-quark is close to its Landau pole, $A_t$ is restricted to be mostly positive, and so most of the $μ>0$ part of the parameter space is eliminated... | |
| dc.description | Revised version for easier TeXing, with some typos corrected. 25 pages + 12 figs.The figs can be faxed on request. | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9509260 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9509260 | |
| dc.identifier | Phys.Rev.D54:2374-2384,1996 | |
| dc.identifier | doi:10.1103/PhysRevD.54.2374 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/202675 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Predictions of Neutralino Dark Matter Event Rates in Minimal Supergravity Unification | |
| dc.type | text |