Stephon Alexander, Antonino Marciano, David Spergel
We propose a model of inflation where the Chern-Simons interaction and vector
fields play a central role in generating an inflationary epoch. As a result, in
accord with the APS mechanism, the Sakharov conditions for baryogenesis are
self-consistently satisfied, and we calculate the net baryon asymmetry index in
terms of the gauge configuration necessary for inflation, based on the chiral
anomaly. Inflation begins with a large plasma density of interacting gauge
fields and fermions, which interact through gravity and the Chern Simons term.
The Chern-Simons term drives power from an initial white-noise spectrum of
gauge fields into a narrow-band of superhorizon wave vectors. At the same time,
the fermionic current and metric coupling amplifies the gauge field on
superhorizon scales. This phase-correlation and amplification of the gauge
field produces the correct conditions to maintain more than 60 e-folds of
inflation. Eventually the gauge field dissipates by producing the observed
baryon asymmetry $\frac{n_{b}}{s} \sim 10^{-10}$, through the chiral anomaly
and inflation ends.
View original:
http://arxiv.org/abs/1107.0318
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