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On the Classical and Quantum Stability of a Cosmic Ghost by Alexander, Stephon; Cormack, Sam; Lowe, David; Sims, Robert is a scholarly article available to read on EtoBox.

What is On the Classical and Quantum Stability of a Cosmic Ghost about?

Ghost fields have reemerged in a handful of phenomenologically motivated cosmological and particle physics scenarios, and most recently in a cyclic mechanism to address the fine-tuning of gauge couplings in the standard model. We study the classical and quantum stability of a ghost-dilaton system coupled to a gauge sector and find that this system is classically stable due to the existence of limit cycles in phase space. We also analyze the coupled gauge invariant classical perturbations and find a range of phenomenologically viable parameters where the system is stable. We also discuss ways to avoid both quantum and vacuum instabilities by either having a ghost condensate or Classicon configurations.

Author

Alexander, Stephon; Cormack, Sam; Lowe, David; Sims, Robert

Published

2017

Language

EN