2013/11/30 by Masaki Asano, Ryosuke Sato
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Electroweak interaction #Higgs boson #Higgsino #Lightest Supersymmetric Particle #Minimal Supersymmetric Standard Model #Particle physics #Particle physics theoretical and experimental studies #Physics #astro-ph.CO #hep-ph
paper · pdf · doi:10.1007/jhep07(2014)134
16 pages, 3 figures, v2: added references and comments, fixed typos and modified comments, in particular, the value of the annihilation cross section is modified and we explicitly describe the coeffeicient which depends on SUSY breaking and origin of the magnetic moment terms to avoid misunderstandings
arxiv created 2014/03/31 · openalex publication_date 2014/07/01 · arxiv updated 2015/06/18 · openalex created_date 2020/07/02 · openalex updated_date 2026/08/05
Several supersymmetric models in which there is a (partially) composite Higgs boson arising from (coupled to) a strong sector have been proposed. Such strong dynamics would help to cause the electroweak symmetry breaking naturally. In this paper, we focus on the compositeness of the Higgsinos in such models. We show that such a Higgsino compositeness can induce the characteristic decay branching fraction of the neutralinos. In such scenarios, the decay branching fraction of the second lightest neutral Higgsino into the lightest neutral Higgsino with photon can be large due to a dipole interaction. We also discuss the Higgsino dark matter feature. The annihilation cross section into γZ can be large.