Göttingen 2012 – scientific programme
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T: Fachverband Teilchenphysik
T 20: Astroteilchenphysik und Kosmologie (Theorie)
T 20.1: Talk
Monday, February 27, 2012, 16:45–17:00, VG 3.101
Loop-induced photon spectral lines from neutralino annihilation in the NMSSM. — •Guillaume Chalons1 and Andreï Semenov2 — 1Karlsruher Institut für Technologie (KIT), Institut für Theoretische Teilchenphysik — 2Laboratoire d'Annecy-le-Vieux de Physique Théorique (LAPTH)
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.