Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-10-10
JHEP 1112:055,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
18 pages, 3 figures. Minor clarifications added in the text. Typing mistakes and references corrected. Matches published versi
Scientific paper
10.1007/JHEP12(2011)055
We have computed the loop-induced processes of neutralino annihilation into two photons and, for the first time, into a photon and a Z boson in the framework of the NMSSM. The photons produced from these radiative modes are monochromatic and possess a clear "smoking gun" experimental signature. This numerical analysis has been done with the help of the SloopS code, initially developed for automatic one-loop calculation in the MSSM. We have computed the rates for different benchmark points coming from SUGRA and GMSB soft SUSY breaking scenarios and compared them with the MSSM. We comment on how this signal can be enhanced, with respect to the MSSM, especially in the low mass region of the neutralino. We also discuss the possibility of this observable to constrain the NMSSM parameter space, taking into account the latest limits from the FERMI collaboration on these two modes.
Chalons Guillaume
Semenov Alexander
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