Dark matter and localised fermions from spherical orbifolds?

  • Giacomo Cacciapaglia
  • Aldo Deandrea
  • Nicolas Deutschmann
Open Access
Regular Article - Theoretical Physics


We study a class of six-dimensional models based on positive curvature surfaces (spherical 2-orbifolds) as extra-spaces. Using the Newman-Penrose formalism, we discuss the particle spectrum in this class of models. The fermion spectrum problem, which has been addressed with flux compactifications in the past, can be avoided using localised fermions. In this framework, we find that there are four types of geometry compatible with the existence of a stable dark matter candidate and we study the simplest case in detail. Using the complementarity between collider resonance searches and relic density constraints, we show that this class of models is under tension, unless the model lies in a funnel region characterised by a resonant Higgs s-channel in the dark matter annihilation.


Phenomenology of Field Theories in Higher Dimensions 


Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.


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Copyright information

© The Author(s) 2016

Authors and Affiliations

  • Giacomo Cacciapaglia
    • 1
    • 2
  • Aldo Deandrea
    • 1
    • 2
    • 4
  • Nicolas Deutschmann
    • 1
    • 2
    • 3
  1. 1.Université de LyonLyonFrance
  2. 2.Université Lyon 1, CNRS/IN2P3, UMR5822 IPNLVilleurbanne CedexFrance
  3. 3.Centre for Cosmology, Particle Physics and Phenomenology (CP3)Université catholique de LouvainLouvain-la-NeuveBelgium
  4. 4.Institut Universitaire de FranceParisFrance

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