The Cosmological Constant in Calabi-Yau 3-fold Compactifications of the Horava-Witten Theory
S.P. de Alwis, Nikolaos Irges
TL;DR
This paper examines the challenges of achieving a small or zero cosmological constant in Horava-Witten theory compactified on Calabi-Yau threefolds, highlighting limitations in parameter freedom after supersymmetry breaking.
Contribution
It analyzes the parameter space in Calabi-Yau compactifications of Horava-Witten theory, demonstrating the difficulty in tuning the cosmological constant to zero.
Findings
Limited adjustable parameters hinder zero cosmological constant
Supersymmetry breaking complicates cosmological constant tuning
Parameter constraints reduce viability of brane world solutions
Abstract
Brane world scenarios offer a way of setting the cosmological constant to zero after supersymmetry breaking provided there is a sufficient number of adjustable integration constants/parameters. In the case of the Horava-Witten theory compactified on a Calabi-Yau threefold, we argue that it is difficult to find enough freedom to get a zero (or small) cosmological constant after supersymmetry breaking.
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