A Stringy Mechanism for A Small Cosmological Constant
arXiv:1204.5177 · doi:10.1088/1475-7516/2012/08/032
Abstract
Based on the probability distributions of products of random variables, we propose a simple stringy mechanism that prefers the meta-stable vacua with a small cosmological constant. We state some relevant properties of the probability distributions of functions of random variables. We then illustrate the mechanism within the flux compactification models in Type IIB string theory. As a result of the stringy dynamics, we argue that the generic probability distribution for the meta-stable vacua typically peaks with a divergent behavior at the zero value of the cosmological constant. However, its suppression in the single modulus model studied here is modest.
36 pages, 8 figures
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- A Stringy Mechanism for A Small Cosmological Constant - Multi-Moduli Cases -
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- Preference for a Vanishingly Small Cosmological Constant in Supersymmetric Vacua in a Type IIB String Theory Model
- Perturbative Stability along the Supersymmetric Directions of the Landscape
- Compactifying de Sitter Naturally Selects a Small Cosmological Constant
- Early-Time Measure in Eternal Inflation
- A Tractable Product Channel Model for Line-of-Sight Scenarios
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- Tensor modes on the string theory landscape
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- The String Origin of SUSY Flavor Violation
- Probing The Neutrino Sector via A Statistical Approach
- Preferred hierarchy scales from the product landscape