1,068,244 research outputs found
CP violation in the B system
The phenomenon of CP violation is crucial to understand the asymmetry between
matter and antimatter that exists in the Universe. Dramatic experimental
progress has been made, in particular in measurements of the behaviour of
particles containing the b quark, where CP violation effects are predicted by
the Kobayashi-Maskawa mechanism that is embedded in the Standard Model. The
status of these measurements and future prospects for an understanding of CP
violation beyond the Standard Model are reviewed.Comment: Invited review for Rep. Prog. Phys. v2 corresponds to published
versio
Lattice Dynamics in the Half-Space, II. Energy Transport Equation
We consider the lattice dynamics in the half-space. The initial data are
random according to a probability measure which enforces slow spatial variation
on the linear scale . We establish two time regimes. For
times of order , , locally the measure
converges to a Gaussian measure which is time stationary with a covariance
inherited from the initial measure (non-Gaussian, in general). For times of
order , this covariance changes in time and is governed by a
semiclassical transport equation.Comment: 35 page
Gravitation interaction with extra dimension and periodic structure of the hadron scattering amplitude
The behavior of the hadron scattering amplitude determined by the gravitation
interaction of hadron at high energies with impact of the KK-modes in d-brane
models of gravity is examined. The possible periodic structure of the
scattering amplitude and its dependence on the number of additional dimensions
are analyzed. The effects of the gravitational hadron form factors obtained
from the hadron eneralized parton distributions (GPDs) on the behavior of the
interaction potential and the scattering amplitude are analyzed. It is shown
that in most part the periodic structure comes from the approximation of our
calculations.Comment: 9 pages, 8 figures, talk on the Intern. Workshop "Bogoliubov
Readings", Dubna (2010); updated reference
Direct measurements of the spin and the cyclotron gaps in a 2D electron system in silicon
Using magnetocapacitance data in tilted magnetic fields, we directly
determine the chemical potential jump in a strongly correlated two-dimensional
electron system in silicon when the filling factor traverses the spin and the
cyclotron gaps. The data yield an effective g-factor that is close to its value
in bulk silicon and does not depend on filling factor. The cyclotron splitting
corresponds to the effective mass that is strongly enhanced at low electron
densities
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