Axions and the QCD phase transition

Details Axions and the QCD phase transition Axions and the QCD phase transition

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992phrvd..45.1130h&link_type=abstract

Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 45, Issue 4, 15 February 1992, pp.1130-1138

Physics

9

Particle-Theory And Field-Theory Models Of The Early Universe, Quark-Gluon Plasma, Elementary Particle Processes

Scientific paper

Axion dynamics during a first-order QCD phase transition are investigated. If the mass of the axion is different on either side of the phase boundary, low-energy axions are trapped in the shrinking regions of the high-temperature phase. A number of different possibilities present themselves: the axions may escape, resulting in the generation of isocurvature density perturbations; if a substantial population of quark nuggets is produced the axions remain trapped for the lifetime of the nugget; or the pressure of the trapped axions may itself prevent the collapse of the bubble of the high-temperature phase, leading to the formation of ``axion nuggets.''

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