Stringy Hidden Valleys
Mirjam Cveti\v{c}, James Halverson, Hernan Piragua

TL;DR
This paper explores string-inspired gauge theories with hidden sectors, revealing generic features like anomalous U(1) symmetries, rich Z' boson phenomenology, and implications for dark matter and supersymmetry breaking.
Contribution
It introduces a class of quiver gauge theories motivated by string compactifications, highlighting their unique phenomenological and theoretical features.
Findings
Presence of anomalous U(1)_V symmetry affecting superpotential couplings
Rich spectrum of heavy and light Z' bosons with observable consequences
Dark matter candidates with weak interactions and potential annihilation channels
Abstract
We study gauge theories where quasi-hidden sectors are added to the MSSM for the sake of string consistency conditions which would otherwise not be satisfied. We focus on quiver gauge theories motivated by weakly coupled type II orientifold compactifications. Model independent features in this class include an anomalous U(1)_V symmetry which protects messenger masses and has strong consequences for superpotential couplings, a rich phenomenology of heavy and light Z' bosons, and axionic couplings required for anomaly cancellation via the Green-Schwarz mechanism. We discuss possibilities for dark matter and supersymmetry breaking in light of these generic features. Dark matter is necessarily non-baryonic, though many dark matter candidates have weak interactions. Most models have a U(1)_V Y Y anomaly whose cancellation requires couplings which allow for dark matter annihilation into…
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