Amplification of hypercharge electromagnetic fields by a cosmological pseudoscalar - art. no. 023508

Citation
R. Brustein et Dh. Oaknin, Amplification of hypercharge electromagnetic fields by a cosmological pseudoscalar - art. no. 023508, PHYS REV D, 6002(2), 1999, pp. 3508
Citations number
50
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
0556-2821 → ACNP
Volume
6002
Issue
2
Year of publication
1999
Database
ISI
SICI code
0556-2821(19990715)6002:2<3508:AOHEFB>2.0.ZU;2-A
Abstract
If, in addition to the standard model fields, a new pseudoscalar field exis ts and couples to the hypercharge topological number density, it can expone ntially amplify hyperelectric and hypermagnetic fields in the symmetric pha se of the electroweak plasma, while coherently rolling or oscillating. We p resent equations describing the coupled system of a pseudoscalar field and hypercharge electromagnetic fields in an electroweak plasma at temperatures above the electroweak phase transition, and discuss approximations to the equations and their validity. We then solve the approximate equations using assorted analytical and numerical methods, and determine the parameters fo r which hypercharge electromagnetic fields can be exponentially amplified. [S0556-2821(99)03012-X].