Real and imaginary mass generation in the presence of external fields and axions

Eduardo I. Guendelman, Stefano Ansoldi, Euro Spallucci

Research output: Contribution to journalArticlepeer-review

Abstract

Small fluctuations around a constant electric or constant magnetic field F are analyzed in a theory with pseudo scalar Φ with a coupling gΦFF̃. It is found that a magnetic external field leads to mass generation for the small perturbations, while an electric field suffers from a tachyonic mass generation in the case in which the field strength is higher than a critical value (related to the pseudo scalar mass). The vacuum energy can be exactly evaluated and it is found that an imaginary part is present when the external electric field exceeds its critical value.

Original languageEnglish
Pages (from-to)969-990
Number of pages22
JournalJournal of High Energy Physics
Volume7
Issue number9
DOIs
StatePublished - 1 Sep 2003

Keywords

  • Nonperturbative Effects
  • Spontaneous Symmetry Breaking

Fingerprint

Dive into the research topics of 'Real and imaginary mass generation in the presence of external fields and axions'. Together they form a unique fingerprint.

Cite this