English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

There has been recent debate over the use of the Boltzmann property in thekinetic equations describing dense neutrino systems such as early Universe andSupernova core. A technique developed by Bell, Rawlinson, and Sawyer utilisesthe flavour evolution timescales of the neutrino systems to test the validityof this assumption. The Friedland-McKellar-Okuniewicz (FMO) many-body neutrinomodel was developed to conduct this test. It was concluded by its authors,using the Bell-Rawlinson-Sawyer timescale test, that the model lent support tothe Boltzmann property assumption. We developed kinetic equations for the FMOmodel. By direct analysis of the kinetic equations we find, in stark contrastto Friedland et al., that in fact the Boltzmann property assumption doesbreakdown in the FMO model. We have shown that the Bell-Rawlinson-Sawyertimescale technique can only be used to invalidate the Boltzmann property butnot validate it.

Proof Of The Invalidity Of The Boltzmann Property In The FMO Many-Body Neutrino Model