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Superpotential
About: Superpotential is a research topic. Over the lifetime, 3836 publications have been published within this topic receiving 137867 citations.
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TL;DR: It is shown that all the nonrenormalizable terms in the effective superpotential for any Abelian symmetric orbifold with at least (0,2) world-sheet supersymmetry as well as any blown-up (2, 2) orbifolds are exponentially suppressed by the size R of the compactified space.
Abstract: We show that all the nonrenormalizable terms in the effective superpotential for any Abelian symmetric orbifold with at least (0,2) world-sheet supersymmetry as well as any blown-up (2,2) orbifold are exponentially suppressed by the size R of the compactified space, i.e., proportionalexp(-R/sup 2//..cap alpha..').
48 citations
TL;DR: In this article, the F-term hybrid inflation model in supergravity is revisited and it is shown that tuning of the initial condition, gravitino overproduction and formation of cosmic strings, for both minimal and non-minimal Kahler potentials, can only be avoided in gauge-mediated SUSY breaking models where the gravitsino is relatively light and the constant term in the superpotential is not important.
Abstract: We revisit the F-term hybrid inflation model in supergravity. In particular, we point out that a constant term in the superpotential has significant effects on the inflaton dynamics. It is shown that the hybrid inflation model suffers from several potential problems: tuning of the initial condition, gravitino overproduction and formation of cosmic strings, for both minimal and non-minimal Kahler potentials. These problems can only be avoided in gauge-mediated SUSY breaking models where the gravitino is relatively light and the constant term in the superpotential is not important. Implications on the non-thermal leptogenesis scenario are also described.
48 citations
TL;DR: In this paper, all holomorphic rational curves in a Calabi-Yau threefold X with 3 ⊕ 3 Wilson lines were identified and the instanton numbers in each integral homology class, including torsion, were found.
Abstract: As a first step towards studying vector bundle moduli in realistic heterotic compactifications, we identify all holomorphic rational curves in a Calabi-Yau threefold X with 3 ⊕ 3 Wilson lines. Computing the homology, we find that H2(X,) = 3 ⊕ 3 ⊕ 3. The torsion curves complicate our analysis, and we develop techniques to distinguish the torsion part of curve classes and to deal with the non-toric threefold X. In this paper, we use direct A-model computations to find the instanton numbers in each integral homology class, including torsion. One interesting result is that there are homology classes that contain only a single instanton, ensuring that there cannot be any unwanted cancellation in the non-perturbative superpotential.
48 citations
TL;DR: In this article, a supersymmetric version of DBI (Dirac-Born-Infeld) inflation is discussed, where ultrarelativistic motion is prohibited to cause inflation, which leads to order of unity sound velocity squared and hence small non-Gaussianities of primordial curvature perturbations.
48 citations
TL;DR: In this article, a general bound on the superpotential of theories with broken supersymmetry and broken R-symmetry was proved for weakly coupled and strongly coupled theories.
Abstract: We prove a general bound on the superpotential in theories with broken su- persymmetry and broken R-symmetry, |h W i| < 1 faF, where fa and F are the R-axion and Goldstino decay constants, respectively. The bound holds for weakly coupled as well as strongly coupled theories, thereby providing an exact result in theories with broken supersymmetry. We briefly discuss several possible applications.
48 citations