2,014 research outputs found
Can CP-violation be observed in heavy-ion collisions?
We demonstrate that, at least at present, there is no convincing way to
detect CP-violation in heavy-ion collisions.Comment: 3 pages, 1 figure; reference added, misprint correcte
Analytic Model of the Universal Structure of Turbulent Boundary Layers
Turbulent boundary layers exhibit a universal structure which nevertheless is
rather complex, being composed of a viscous sub-layer, a buffer zone, and a
turbulent log-law region. In this letter we present a simple analytic model of
turbulent boundary layers which culminates in explicit formulae for the
profiles of the mean velocity, the kinetic energy and the Reynolds stress as a
function of the distance from the wall. The resulting profiles are in close
quantitative agreement with measurements over the entire structure of the
boundary layer, without any need of re-fitting in the different zones.Comment: 5 pages, 4 figs, JETP Letters, submitted. Comparison with the latest
DNS dat
Evolution of thick domain walls in inflationary and universe
We study the evolution of thick domain walls in the different models of
cosmological inflation, in the matter-dominated and radiation-dominated
universe, or more generally in the universe with the equation of state
. We have found that the domain wall evolution crucially depends on
the time-dependent parameter , where is the
Hubble parameter and is the thickness of the wall in flat
space-time. For the physical thickness of the wall, ,
tends with time to , which is microscopically small. Otherwise, when
, the wall steadily expands and can grow up to a cosmologically
large size.Comment: 15 pages, 9 figure
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