3,254 research outputs found
Numerical solutions of the one-dimensional nucleon-meson cascade equations
Numerical integration of meson-nucleon cascade equations for accelerator shielding calculation
NC Data - Nuclear Collision Data for nucleon-nucleus collisions in the energy range 25 to 400 MeV
FORTRAN computer program for cross sections, and particle emission analysis in nucleon-nucleus collision
Analytic representation of nucleon and pion-emission spectra from nucleon-nucleus collisions in the energy range 750-2000 MeV
Analytical representation of nucleon and pion emission spectra from nucleon-nucleus collisions in energy range 750-2000 Me
A radiometer for stochastic gravitational waves
The LIGO Scientific Collaboration recently reported a new upper limit on an
isotropic stochastic background of gravitational waves obtained based on the
data from the 3rd LIGO science Run (S3). Now I present a new method for
obtaining directional upper limits that the LIGO Scientific Collaboration
intends to use for future LIGO science runs and that essentially implements a
gravitational wave radiometer.Comment: 6 pages, 2 figure
Analytic representation of nonelastic cross sections and particle-emission spectra from nucleon-nucleus collisions in the energy range 25 to 400 MeV
Analytic representation of nonelastic cross sections and particle emission spectra from nucleon-nucleus collisions in 25 to 400MeV energy rang
On the theory of large amplitude Alfven waves
Large amplitude Alfvenic disturbances of arbitrary spatial shape and polarization are described by MHD equations, without resort to the usual assumption of planarity. However, because of their nonplanar nature, the direction of propagation of these disturbances cannot, in general, be determined by looking for minima in a variance matrix constructed from observed field fluctuations. When such minima exist, one is observing that subset of interplanetary Alfven waves that is essentially planar
Coherent States and N Dimensional Coordinate Noncommutativity
Considering coordinates as operators whose measured values are expectations
between generalized coherent states based on the group SO(N,1) leads to
coordinate noncommutativity together with full dimensional rotation
invariance. Through the introduction of a gauge potential this theory can
additionally be made invariant under dimensional translations. Fluctuations
in coordinate measurements are determined by two scales. For small distances
these fluctuations are fixed at the noncommutativity parameter while for larger
distances they are proportional to the distance itself divided by a {\em very}
large number. Limits on this number will lbe available from LIGO measurements.Comment: 16 pqges. LaTeX with JHEP.cl
Negatively Charged Strangelet Search using the E864 Spectrometer at the AGS
We provide a status report on the progress of searching for negatively
charged strangelets using the E864 spectrometer at the AGS. About 200 million
recorded events representing approximately 14 billion 10% central interactions
of Au + Pt at 11.5 GeV/c taken during the 1996-1997 run of the experiment are
used in the analysis. No strangelet candidates are seen for charges Z=-1 and
Z=-2, corresponding to a 90% confidence level for upper limits of strangelet
production of ~1 x 10^{-8} and ~4 x 10^{-9} per central collision respectively.
The limits are nearly uniform over a wide range of masses and are valid only
for strangelets which are stable or have lifetimes greater than ~50 ns.Comment: 6 pages, 4 figures; Talk at SQM'98, Padova, Italy (July 20-24, 1998
Shielding Against The Neutrons Produced When 400-mev electrons Are incident On A Thick Copper Target
Measurement of the B Semileptonic Branching Fraction with Lepton Tags
We have used the CLEO II detector and 2.06fb^(-1) of ϒ(4S) data to measure the B-meson semileptonic branching fraction. The B→Xeν momentum spectrum was obtained over nearly the full momentum range by using charge and kinematic correlations in events with a high-momentum lepton tag and an additional electron. We find B(B→Xeν) = (10.49±0.17±0.43)%, with overall systematic uncertainties less than those of untagged single-lepton measurements. We use this result to calculate the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element V_(cb) and to set an upper limit on the fraction of ϒ(4S) decays to final states other than BB̅
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