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- Title
Cosmological constant in a model with superstring-inspired E<sub>6</sub> unification and shadow θ-particles.
- Authors
Das, C. R.; Laperashvili, L. V.; Tureanu, A.
- Abstract
We have developed the concept of parallel existence of the ordinary (O-) and mirror (M-), or shadow (Sh-) worlds. In the first part of the paper we consider a mirror world with broken mirror parity and the breaking E6→SU(3)3 in both worlds. We show that in this case the evolutions of coupling constants in the O- and M-worlds are not identical, having different parameters for similar evolutions. E6 unification, inspired by superstring theory, restores the broken mirror parity at the scale ∼1018 GeV. With the aim to explain the tiny cosmological constant, in the second part we consider the breakings: E6→SO(10)×U(1) Z in the O-world, and E′6→SU(6)′×SU(2)′ θ in the Sh-world. We assume the existence of shadow θ-particles and the low-energy symmetry group SU(3)′ C×SU(2)′ L×SU(2)′ θ×U(1)′ Y in the shadow world, instead of the Standard Model. The additional non-Abelian SU(2)′ θ group with massless gauge fields, “thetons”, has a macroscopic confinement radius 1/ Λ′ θ. The assumption that Λ′ θ≈2.3⋅10−3 eV explains the tiny cosmological constant given by recent astrophysical measurements. In this way the present work opens the possibility to specify a grand unification group, such as E6, from cosmology.
- Subjects
METAPHYSICAL cosmology; STRING models (Physics); NUCLEAR reactions; PARTICLES (Nuclear physics); GAUGE field theory
- Publication
European Physical Journal C -- Particles & Fields, 2010, Vol 66, Issue 1/2, p307
- ISSN
1434-6044
- Publication type
Article
- DOI
10.1140/epjc/s10052-009-1229-2