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High Energy Physics - Phenomenology

arXiv:1311.6823 (hep-ph)
[Submitted on 26 Nov 2013 (v1), last revised 31 Mar 2014 (this version, v2)]

Title:Composite Higgsino

Authors:Masaki Asano, Ryosuke Sato
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Abstract: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 gamma Z can be large.
Comments: 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
Subjects: High Energy Physics - Phenomenology (hep-ph); Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Report number: KEK-TH-1688
Cite as: arXiv:1311.6823 [hep-ph]
  (or arXiv:1311.6823v2 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.1311.6823
Related DOI: https://doi.org/10.1007/JHEP07%282014%29134

Submission history

From: Masaki Asano [view email]
[v1] Tue, 26 Nov 2013 21:18:32 UTC (248 KB)
[v2] Mon, 31 Mar 2014 17:32:51 UTC (251 KB)
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