Axionic suppression of plasma wakefield acceleration

D A Burton, A Noble, T J Walton

Research output: Contribution to journalArticle

3 Citations (Scopus)
72 Downloads (Pure)

Abstract

Contemporary attempts to explain the existence of ultra-high energy cosmic rays using plasma-based wakefield acceleration deliberately avoid non-Standard Model particle physics. However, such proposals exploit some of the most extreme environments in the Universe and it is conceivable that hypothetical particles outside the Standard Model have significant implications for the effectiveness of the acceleration process. Axions solve the strong CP problem and provide one of the most important candidates for Cold Dark Matter, and their potential significance in the present context should not be overlooked. Our analysis of the field equations describing a plasma augmented with axions uncovers a dramatic axion-induced suppression of the energy gained by a test particle in the wakefield driven by a particle bunch, or an intense pulse of electromagnetic radiation, propagating at ultra-relativistic speeds within the strongest magnetic fields in the Universe.
Original languageEnglish
Article number385501
Number of pages16
JournalJournal of Physics A: Mathematical and Theoretical
Volume49
Issue number38
DOIs
Publication statusPublished - 26 Aug 2016

Keywords

  • ultra-high energy cosmic rays
  • plasma
  • wakefield acceleration
  • axions
  • cold dark matter
  • field equations
  • electromagnetic radiation
  • magnetic fields
  • cosmic rays
  • astrophysics

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