SUSY's Ladder: Reframing Sequestering at Large Volume
Matthew Reece, Wei Xue

TL;DR
This paper explores the hierarchy of mass scales in large volume supersymmetric theories, called SUSY's Ladder, highlighting its phenomenological advantages and deriving its effective field theory from higher-dimensional supergravity models.
Contribution
It introduces SUSY's Ladder as a new hierarchy structure in no-scale models, and demonstrates its origin from specific higher-dimensional theories, providing a novel phenomenological perspective.
Findings
SUSY's Ladder suppresses gaugino masses relative to scalar masses.
The scenario avoids common supersymmetric problems like the gravitino and flavor issues.
Four-dimensional no-scale theories originate from five- and ten-dimensional supergravity.
Abstract
Theories with approximate no-scale structure, such as the Large Volume Scenario, have a distinctive hierarchy of multiple mass scales in between TeV gaugino masses and the Planck scale, which we call SUSY's Ladder. This is a particular realization of Split Supersymmetry in which the same small parameter suppresses gaugino masses relative to scalar soft masses, scalar soft masses relative to the gravitino mass, and the UV cutoff or string scale relative to the Planck scale. This scenario has many phenomenologically interesting properties, and can avoid dangers including the gravitino problem, flavor problems, and the moduli-induced LSP problem that plague other supersymmetric theories. We study SUSY's Ladder using a superspace formalism that makes the mysterious cancelations in previous computations manifest. This opens the possibility of a consistent effective field theory understanding…
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