Statistical mechanics of soft-boson phase transitions

Details Statistical mechanics of soft-boson phase transitions Statistical mechanics of soft-boson phase transitions

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991smsb.rept.....g&link_type=abstract

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Physics

Condensed Matter

Statistical Mechanics

Bosons, Phase Transformations, Red Shift, Statistical Mechanics, Stellar Mass, Stellar Structure, Anisotropy, Background Radiation, Dark Matter, Extraterrestrial Matter, Microwaves, Neutrinos, Recombination Reactions, Scalars, Stellar Models, Temperature Effects

Scientific paper

The existence of structure on large (100 Mpc) scales, and limits to anisotropies in the cosmic microwave background radiation (CMBR), have imperiled models of structure formation based solely upon the standard cold dark matter scenario. Novel scenarios, which may be compatible with large scale structure and small CMBR anisotropies, invoke nonlinear fluctuations in the density appearing after recombination, accomplished via the use of late time phase transitions involving ultralow mass scalar bosons. Herein, the statistical mechanics are studied of such phase transitions in several models involving naturally ultralow mass pseudo-Nambu-Goldstone bosons (pNGB's). These models can exhibit several interesting effects at high temperature, which is believed to be the most general possibilities for pNGB's.

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