17,941 research outputs found
Theoretical constraints on masses of heavy particles in Left-Right Symmetric Models
Left-Right symmetric models with general gauge couplings which
include bidoublet and triplet scalar multiplets are studied. Possible scalar
mass spectra are outlined by imposing Tree-Unitarity, and Vacuum Stability
criteria and also using the bounds on neutral scalar masses
which assure the absence of Flavour Changing Neutral Currents (FCNC). We are
focusing on mass spectra relevant for the LHC analysis, i.e., the scalar masses
are around TeV scale. As all non-standard heavy particle masses are related to
the vacuum expectation value (VEV) of the right-handed triplet (), the
combined effects of relevant Higgs potential parameters and
regulate the lower limits of heavy gauge boson masses. The complete set of
Renormalization Group Evolutions for all couplings are provided at the 1-loop
level, including the mixing effects in the Yukawa sector. Most of the scalar
couplings suffer from the Landau poles at the intermediate scale GeV, which in general coincides with violation of the Tree-Unitarity
bounds.Comment: 9 pages, 5 figures, pdflatex, Matches published versio
Assessment of Effectiveness of Buffer Zones in Removing Impurities in Runoff from Areas Treated with Poultry Litter. Part II: Source Areas to Buffer Areas Ratio Effects
Vegetative filter strips (VFS) are known to reduce runoff losses of nutrients. solids. and other materials from land areas treated with fertilizers . Although VFS effectiveness is known to depend partially on the relative lengths of filter and pollutant source areas. there is little experimental evidence available to quantify this dependence. This is particularly the case when VFS are implemented down-slope of pasture areas treated with animal manures such as poultry litter. This study assessed the influences of pollutant source area (treated with poultry litter) and VFS lengths on VFS removal of total Kjeldahl nitrogen (TKN). ammonia nitrogen (NH3 -N ). nitrate nitrogen (N03-N). ortho-phosphorus (P04-P). total phosphorus (TP). total organic carbon (TOC). total suspended solids (TSS). and fecal coliform (FC) fromincoming runoff for a silt loam soil with fescue cover. Litter-treated lengths of 6.1. 12.2. and 18.3 m with corresponding VFS lengths of up to 18.3 m. 12.2 m. and 6.1 m. respectively, were examined. Runoff was produced from simulated rainfall applied at 50 mm/h for 1 h of runoff. Concentrations of the parameters analyzed were unaffected by litter treated length but demonstrated a first-order decrease with increasing VFS length except in the cases of TSS and FC. Mass transport of TKN. NH3-N. P04-P. and TP increased with increasing litter-treated length (due to increased runoff) and decreased (approximately first-order) with increasing VFS length. Effectiveness of the VFS in terms of TKN. NH3-N. P04 -P. and TP removal from runoff ranged from 6.5 to 96.3% depending on the particular parameter. litter-treated length. and VFS length. The data collected during this study can be helpful in developing and testing simulation models of VFS performance and can thus aid in design of VFS for pasture areas treated with poultry litter
The wavelength of neutrino and neutral kaon oscillations
Neutral kaons, and probably also neutrinos, exhibit oscillations between
flavor eigenstates, as a result of being produced in a superposition of mass
eigenstates. Several recent papers have addressed the question of the energies
and momenta of the components of these states, and their effect on the
coherence of the states and on the wavelength of the oscillations. We point out
that the mass eigenstates need have neither equal momentum nor equal energy,
but can nevertheless be coherent, and that a correct treatment of the
kinematics recovers the usual result for the wavelength of the flavor
oscillations.Comment: 7 pages, Latex, no figures. Added references. Formatted for Phys.
Lett. B (needs elsart.cls
Interpolation function of the genocchi type polynomials
The main purpose of this paper is to construct not only generating functions
of the new approach Genocchi type numbers and polynomials but also
interpolation function of these numbers and polynomials which are related to a,
b, c arbitrary positive real parameters. We prove multiplication theorem of
these polynomials. Furthermore, we give some identities and applications
associated with these numbers, polynomials and their interpolation functions.Comment: 14 page
Differentially Private Publication of Sparse Data
The problem of privately releasing data is to provide a version of a dataset
without revealing sensitive information about the individuals who contribute to
the data. The model of differential privacy allows such private release while
providing strong guarantees on the output. A basic mechanism achieves
differential privacy by adding noise to the frequency counts in the contingency
tables (or, a subset of the count data cube) derived from the dataset. However,
when the dataset is sparse in its underlying space, as is the case for most
multi-attribute relations, then the effect of adding noise is to vastly
increase the size of the published data: it implicitly creates a huge number of
dummy data points to mask the true data, making it almost impossible to work
with.
We present techniques to overcome this roadblock and allow efficient private
release of sparse data, while maintaining the guarantees of differential
privacy. Our approach is to release a compact summary of the noisy data.
Generating the noisy data and then summarizing it would still be very costly,
so we show how to shortcut this step, and instead directly generate the summary
from the input data, without materializing the vast intermediate noisy data. We
instantiate this outline for a variety of sampling and filtering methods, and
show how to use the resulting summary for approximate, private, query
answering. Our experimental study shows that this is an effective, practical
solution, with comparable and occasionally improved utility over the costly
materialization approach
Probing Gauge String Formation in a Superconducting Phase Transition
Superconductors are the only experimentally accessible systems with
spontaneously broken gauge symmetries which support topologically nontrivial
defects, namely string defects. We propose two experiments whose aim is the
observation of the dense network of these strings thought to arise, via the
Kibble mechanism, in the course of a spontaneous symmetry breaking phase
transition. We suggest ways to estimate the order of magnitude of the density
of flux tubes produced in the phase transition. This may provide an
experimental check for the theories of the production of topological defects in
a spontaneously broken gauge theory, such as those employed in the context of
the early Universe.Comment: 16 pages (Latex), 4 figures included, change in title, some minor
changes, published versio
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