1,535,267 research outputs found
Quantization of bosonic fields with two mass and spin states
We investigate bosonic fields possessing two mass and spin states. The
density matrix in the first order formalism is obtained. The quantization of
fields in the first order formulation is performed and propagators are found.Comment: 9 page
Transition Probability to Turbulent Transport Regime
Transition phenomena between thermal noise state and turbulent state observed
in a submarginal turbulent plasma are analyzed with statistical theory.
Time-development of turbulent fluctuation is obtained by numerical simulations
of Langevin equation which contains hysteresis characteristics. Transition
rates between two states are analyzed. Transition from turbulent state to
thermal noise state occurs in entire region between subcritical bifurcation
point and linear stability boundary.Comment: 9 pages, 6 figures, to be published in Plasma Phys. Control. Fusio
Hamilton-Jacobi quantization of singular Lagrangians with linear velocities
In this paper, constrained Hamiltonian systems with linear velocities are
investigated by using the Hamilton-Jacobi method. We shall consider the
integrablity conditions on the equations of motion and the action function as
well in order to obtain the path integral quantization of singular Lagrangians
with linear velocities.Comment: late
Analysis of the second order exchange self energy of a dense electron gas
We investigate the evaluation of the six-fold integral representation for the
second order exchange contribution to the self energy of a three dimensional
electron gas at the Fermi surface.Comment: 6 page
Can the flyby anomaly be attributed to earth-bound dark matter?
We make preliminary estimates to assess whether the recently reported flyby
anomaly can be attributed to dark matter interactions. We consider both elastic
and exothermic inelastic scattering from dark matter constituents; for
isotropic dark matter velocity distributions, the former decrease, while the
latter increase, the final flyby velocity. The fact that the observed flyby
velocity anomaly shows examples with both positive and negative signs, requires
the dominance of different dark matter scattering processes along different
flyby trajectories. The magnitude of the observed anomalies requires dark
matter densities many orders of magnitude greater than the galactic halo
density. Such a large density could result from an accumulation cascade, in
which the solar system-bound dark matter density is much higher than the
galactic halo density, and the earth-bound density is much higher than the
solar system-bound density. We discuss a number of strong constraints on the
hypothesis of a dark matter explanation for the flyby anomaly. These require
dark matter to be non-self-annihilating, with the dark matter scattering cross
section on nucleons much larger, and the dark matter mass much lighter, than
usually assumed.Comment: Latex, 21 pages. v3: substantially revised and expanded; v4: version
to appear in Phys. Rev.
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