2005/12/31 by Marco Cirelli, Nicolao Fornengo, N. Fornengo +2 · 9 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #astro-ph #hep-ph
paper · pdf · doi:10.1016/j.nuclphysb.2006.07.012
published as Nucl.Phys.B753:178-194,2006 · 16 pages, 2 figures. (v2: comments added, details of DM freeze-out compared with hep-ph/0601041, such that our revised version agrees with their revised version. v3: reference and comment on direct detection added, v3 matches published version in NPB. v4: some misprints in equations corrected.)
openalex publication_date 2006/08/03 · arxiv created 2007/07/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
A few multiplets that can be added to the SM contain a lightest neutral component which is automatically stable and provides allowed DM candidates with a non-standard phenomenology. Thanks to coannihilations, a successful thermal abundance is obtained for well defined DM masses. The best candidate seems to be a SU(2)L fermion quintuplet with mass 4.4 TeV, accompanied by a charged partner 166 MeV heavier with life-time 1.8 cm, that manifests at colliders as charged tracks disappearing in pi^± with 97.7% branching ratio. The cross section for usual NC direct DM detection is sigmaSI = f2 1.0 10-43 cm2 where f ~ 1 is a nucleon matrix element. We study prospects for CC direct detection and for indirect detection.