2013/05/31 by Anindya Datta, Ujjal Kumar Dey, Amitava Raychaudhuri +1
Physics and Astronomy · #Boson #Compactification (mathematics) #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Extra dimensions #Fermion #Gauge boson #Gauge theory #Parity (physics) #Particle physics #Particle physics theoretical and experimental studies #Physics #Universal extra dimension #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.88.016011
published as Phys. Rev. D 88, 016011 (2013) · 23 pages including Appendix, 6 figures, Minor typographical improvements,Publish version
openalex publication_date 2013/07/29 · arxiv created 2013/07/30 · arxiv updated 2013/07/31 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In universal extra dimension (UED) models with one compactified extra dimension, a Z2 symmetry, termed KK parity, ensures the stability of the lightest Kaluza-Klein particle (LKP) which could be a viable dark matter candidate. This symmetry leads to two fixed points. In nonminimal versions of UED boundary-localized (kinetic or mass) terms (BLT) for different fields are included at these fixed points and KK parity may be violated. However, BLTs with same strength at both points induce a new Z2 symmetry which restores the stability of the LKP. We show that the BLTs serve to relax the bounds set on the compactification scale in UED by the observed dark matter relic density. At the same time, the precision of the dark matter measurements severely correlates the BLT parameters of gauge bosons and fermions. Depending on the parameter values, the LKP can be chosen to be the level-1 photon, which is essentially the B(1), or the level-1 Z boson, basically the W3(1). We find that in the latter case the relic density is too small if the W3(1) has a mass \ensuremath∼1 TeV. We also explore the prospects of direct detection of an LKP which matches the observed dark matter relic density.