SUSY interpretation of the Egret GeV anomaly, Xenon-10 dark matter search limits and the LHC
| dc.creator | Baer, Howard | |
| dc.creator | Belyaev, Alexander | |
| dc.creator | Summy, Heaya | |
| dc.date | 2008-02-21 | |
| dc.date.accessioned | 2026-07-07T11:56:14Z | |
| dc.date.available | 2026-07-07T11:56:14Z | |
| dc.description | The observation of the Egret experiment of an excess of diffuse gamma rays with energies above E_γ=1 GeV has previously been interpreted in the context of the minimal supergravity model (mSUGRA) as coming from neutralino annihilation into mainly b-quarks in the galactic halo, with neutralino mass in the vicinity of 50-70 GeV. We observe that in order to obtain the correct relic abundance of neutralinos in accord with WMAP measurements, the corresponding neutralino-proton direct detection (DD) rates should be in excess of recent limits from the Xenon-10 collaboration. While it does not appear possible to satisfy the Egret, WMAP and Xenon-10 constraints simultaneously within the mSUGRA model, we find that it is easily possible in models with non-universal Higgs soft masses (NUHM). In either case, gluino pair production from m(gluino)\sim 400-500 GeV should occur at large rates at the CERN LHC, and a gluino pair production signal should be visible with just 0.1 fb^{-1} of integrated luminosity. The NUHM interpretation predicts a rather light spectrum of heavy Higgs bosons with m_A\sim 140-200 GeV over the whole parameter space which would interpret Egret data. Spin-independent DD rates are predicted to be just above 10^{-8} pb, within range of the next round of direct dark matter detection experiments. | |
| dc.description | 17 pages with 13 eps figures | |
| dc.identifier | https://arxiv.org/abs/0802.3127 | |
| dc.identifier | http://arxiv.org/abs/0802.3127 | |
| dc.identifier | Phys.Rev.D77:095013,2008 | |
| dc.identifier | doi:10.1103/PhysRevD.77.095013 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/205514 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | SUSY interpretation of the Egret GeV anomaly, Xenon-10 dark matter search limits and the LHC | |
| dc.type | text |