In a two-brane model, brane asymmetry produces different fermion masses, allowing superheavy leptons on the second brane to act as dark matter without fine-tuning.
Compactifying de Sitter Naturally Selects a Small Cosmological Constant
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abstract
We study compactifications of $D$-dimensional de Sitter space with a $q$-form flux down to $D-Nq$ dimensions. We show that for $(N-1)(q-1)\geq 2$ there are double-exponentially or even infinitely many compact de Sitter vacua, and that their effective cosmological constants accumulate at zero. This population explosion of $\Lambda \ll 1$ de Sitters arises by a mechanism analogous to natural selection.
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Reexamination of the SO(16)xSO(16)' nonsupersymmetric model for implications on dark energy, vacuum stabilization, dark matter candidates, and gauge-Higgs unification in light of LHC and dark energy data.
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Formation of Asymmetrical Two-Brane Structure and its Possible Manifestation
In a two-brane model, brane asymmetry produces different fermion masses, allowing superheavy leptons on the second brane to act as dark matter without fine-tuning.
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Dark Horse, Dark Matter: Revisiting the SO(16)x SO(16)' Nonsupersymmetric Model in the LHC and Dark Energy Era
Reexamination of the SO(16)xSO(16)' nonsupersymmetric model for implications on dark energy, vacuum stabilization, dark matter candidates, and gauge-Higgs unification in light of LHC and dark energy data.