====== TTP12-044 Neutralino dark matter and the Fermi gamma-ray lines ======
 
 
   <hidden TTP12-044  Neutralino dark matter and the Fermi gamma-ray lines > Motivated by recent claims of lines in the Fermi gamma-ray spectrum, we critically examine means of enhancing neutralino annihilation into neutral gauge bosons. The signal can be boosted while remaining consistent with continuum photon constraints if a new singlet-like pseudoscalar is present. We consider singlet extensions of the MSSM, focusing on the NMSSM, where a `well-tempered' neutralino can explain the lines while remaining consistent with current constraints. We adopt a complementary numerical and analytic approach throughout in order to gain intuition for the underlying physics. The scenario requires a rich spectrum of light neutralinos and charginos leading to characteristic phenomenological signatures at the LHC whose properties we explore. Future direct detection prospects are excellent, with sizeable spin-dependent and spin-independent cross-sections.  </hidden>
|**Guillaume Chalons, Matthew J. Dolan, Christopher McCabe**  | 
|** JCAP 1302 016 2013  **  |
| {{preprints:2012:ttp12-044.pdf|PDF}} {{preprints:2012:ttp12-044.ps|PostScript}} [[http://arxiv.org/abs/1211.5154|arXiv]]   |
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