SUSY interpretation of the Egret GeV anomaly, Xenon-10 dark matter search limits and the LHC
arXiv:0802.3127 · doi:10.1103/PhysRevD.77.095013
Abstract
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.
arXiv comment17 pages with 13 eps figures
References in corpus (59)
- Supersymmetric Dark Matter
- SPheno, a program for calculating supersymmetric spectra, SUSY particle decays and SUSY particle production at e+ e- colliders
- SuSpect: a Fortran Code for the Supersymmetric and Higgs Particle Spectrum in the MSSM
- SOFTSUSY: a program for calculating supersymmetric spectra
- micrOMEGAs2.0: a program to calculate the relic density of dark matter in a generic model
- EGRET Observations of the Extragalactic Gamma Ray Emission
- Search for Neutral MSSM Higgs Bosons at LEP
- First Results from the XENON10 Dark Matter Experiment at the Gran Sasso National Laboratory
- The Neutralino Relic Density in Minimal N=1 Supergravity
- Diffuse Galactic continuum gamma rays. A model compatible with EGRET data and cosmic-ray measurements
- Precision SUSY Measurements at LHC
- Dark Matter and Collider Phenomenology of Universal Extra Dimensions
- Direct, Indirect and Collider Detection of Neutralino Dark Matter In SUSY Models with Non-universal Higgs Masses
- The MSSM Parameter Space with Non-Universal Higgs Masses
- The CMSSM Parameter Space at Large tan beta
- Anomaly-Free Gauged R-Symmetry
- Cosmological Relic Density from Minimal Supergravity with Implications for Collider Physics
- Neutralino Dark Matter in Minimal Supergravity: Direct Detection vs. Collider Searches
- Exploration of the MSSM with Non-Universal Higgs Masses
- Non-Universal Soft SUSY Breaking and Dark Matter
- New Cosmological and Experimental Constraints on the CMSSM
- Constraints on the Minimal Supergravity Model and Prospects for SUSY Particle Production at Future Linear e^+ e^- Colliders
- Yukawa Unified Supersymmetric SO(10) Model: Cosmology, Rare Decays and Collider Searches
- Measurements of Masses in SUGRA Models at LHC
- Neutralino relic density in minimal supergravity with co-annihilations
- SIGNALS FOR MINIMAL SUPERGRAVITY AT THE CERN LARGE HADRON COLLIDER: MULTI-JET PLUS MISSING ENERGY CHANNEL,
- Chi**2 analysis of the minimal supergravity model including WMAP, g(mu)-2 and b -> s gamma constraints
- Neutralino dark matter in supersymmetric models with non--universal scalar mass terms
- Probing the supersymmetric parameter space by WIMP direct detection
- Updated Constraints on the Minimal Supergravity Model
- Updated Constraints on the Minimal Supergravity Model
- Neutralino Cold Dark Matter in a One Parameter Extension of the Minimal Supergravity Model
- Implications of the Pseudo-Scalar Higgs Boson in determining the Neutralino Dark Matter
- Trileptons from Chargino-Neutralino Production at the CERN Large Hadron Collider
- WMAPing the Universe: Supersymmetry, Dark Matter, Dark Energy, Proton Decay and Collider Physics
- Model Independent Approach to Focus Point Supersymmetry: from Dark Matter to Collider Searches
- Direct Detection of Dark Matter in Supersymmetric Models
- EGRET Excess of Diffuse Galactic Gamma Rays as Tracer of Dark Matter
- Comparison of SUSY spectrum calculations and impact on the relic density constraints from WMAP
- Measurements in Gauge Mediated SUSY Breaking Models at LHC
- Aspects of Chargino-Neutralino Production at the Tevatron Collider
- Chargino and Neutralino Decays Revisited
- On the treatment of threshold effects in SUSY spectrum computations
- Compatibility of the new DAMA/NaI data on an annual modulation effect in WIMP direct search with a relic neutralino in supergravity schemes
- A Detailed Study of the Gluino Decay into the Third Generation Squarks at the CERN LHC
- Determining SUSY model parameters and masses at the LHC using cross-sections, kinematic edges and other observables
- The Likely Cause of the EGRET GeV Anomaly and its Implications
- Indirect, Direct and Collider Detection of Neutralino Dark Matter
- Is the dark matter interpretation of the EGRET gamma excess compatible with antiproton measurements?
- Light Heavy MSSM Higgs Bosons at Large tan_beta
- The supersymmetric interpretation of the EGRET excess of diffuse Galactic gamma rays
- Searching for the Higgs Bosons of Minimal Supersymmetry with Muon Pairs and Bottom Quarks
- Excess of EGRET Galactic Gamma Ray Data interpreted as Dark Matter Annihilation
- Early SUSY discovery at LHC without missing E_T: the role of multi-leptons
- Discovering the Higgs Bosons of Minimal Supersymmetry with Muons and a Bottom Quark
- Indirect Searches For Dark Matter: Signals, Hints and Otherwise
- Probing Neutralino Resonance Annihilation via Indirect Detection of Dark Matter
- Is the Dark Matter interpretation of the EGRET gamma ray excess compatible with antiproton measurements?
- Little Higgs Models and T Parity