918 research outputs found
The FPRS Student Chapter- An Important Foundation for your future
On behalf of the Executive Board and members of the Forest Products Research Society, I wish to extend our sincere congratulations to the students and faculty of the Iowa State Department of Forestry in this 70th year of publication of the Ames Forester
Coulomb corrections to the three-body correlation function in high-energy heavy ion reactions
Starting from an asymptotically correct three-body Coulomb wave-function, we
determine the effect of Coulomb final state interaction on the three-particle
Bose-Einstein correlation function of similarly charged particles. We
numerically estimate that the Riverside approximation is not precise enough to
determine the three-body Coulomb correction factor in the correlation function,
if the characteristic HBT radius parameter is 5 - 10 fm, which is the range of
interest in high-energy heavy ion physics.Comment: 14 pages, 4 figure
Erratum: Identification of responsive cells in the developing somite supports a role for β‐catenin‐dependent Wnt signaling in maintaining the DML myogenic progenitor pool
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/90355/1/23720_ftp.pd
Helical ordering in the ground state of spin-one color superconductors as a consequence of parity violation
We investigate spin-one color superconductivity of a single quark flavor
using the Ginzburg-Landau theory. First we examine the classic analysis of
Bailin and Love and show that by restricting to the so-called inert states, it
misses the true ground state in a part of the phase diagram. This suggests the
use of the more general, noninert states in particular within three-flavor
quark matter where the color neutrality constraint imposes stress on the
spin-one pairing and may disfavor the symmetric color-spin-locked state. In the
second part of the paper we show that, in analogy to some ferromagnetic
materials, lack of space-inversion symmetry leads to a new term in the
Ginzburg-Landau functional, which favors a spatially nonuniform long-range
ordering with a spiral structure. In color superconductors, this new
parity-violating term is a tiny effect of weak-interaction physics. The
modified phase diagram is determined and the corresponding ground states for
all the phases constructed. At the end, we estimate the coefficient of the new
term in the free energy functional, and discuss its relevance for the
phenomenology of dense quark matter.Comment: 20 pages, REVTeX4, 6 eps figures; v2: references added, version to
appear in Phys. Rev.
Searching for Radio Pulsars in 3EG Sources at Urumqi Observatory
Since mid-2005, a pulsar searching system has been operating at 18 cm on the
25-m radio telescope of Urumqi Observatory. Test observations on known pulsars
show that the system can perform the intended task. The prospect of using this
system to observe 3EG sources and other target searching tasks is discussed.Comment: a training project about MSc thesi
Electron-impact ionization of atomic hydrogen at 2 eV above threshold
The convergent close-coupling method is applied to the calculation of fully
differential cross sections for ionization of atomic hydrogen by 15.6 eV
electrons. We find that even at this low energy the method is able to yield
predictive results with small uncertainty. As a consequence we suspect that the
experimental normalization at this energy is approximately a factor of two too
high.Comment: 10 page
Magneto-optics of massive Dirac fermions in bulk Bi2Se3
We report on magneto-optical studies of Bi2Se3, a representative member of
the 3D topological insulator family. Its electronic states in bulk are shown to
be well described by a simple Dirac-type Hamiltonian for massive particles with
only two parameters: the fundamental bandgap and the band velocity. In a
magnetic field, this model implies a unique property - spin splitting equal to
twice the cyclotron energy: Es = 2Ec. This explains the extensive
magneto-transport studies concluding a fortuitous degeneracy of the spin and
orbital split Landau levels in this material. The Es = 2Ec match differentiates
the massive Dirac electrons in bulk Bi2Se3 from those in quantum
electrodynamics, for which Es = Ec always holds.Comment: 5 pages, 3 figures and Supplementary materials, to be published in
Physical Review Letter
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