13,943 research outputs found
Velocity-dependent energy gaps and dynamics of superfluid neutron stars
We show that suppression of the baryon energy gaps, caused by the relative
motion of superfluid and normal liquid components, can substantially influence
dynamical properties and evolution of neutron stars. This effect has been
previously ignored in the neutron-star literature.Comment: 6 pages, 5 figures, accepted by MNRAS Let
Precision Measurement of sin^2 theta_W at a Reactor
This paper presents a strategy for measuring sin^2 theta_W to ~1% at a
reactor-based experiment, using antineutrinos electron elastic scattering. This
error is comparable to the NuTeV, SLAC E158, and APV results on sin^2 theta_W,
but with substantially different contributions to the systematics. An improved
method for identifying antineutrino proton events, which serve both as a
background and as a normalization sample, is described. The measurement can be
performed using the near detector of the presently proposed reactor-based
oscillation experiments. We conclude that an absolute error of delta(sin^2
theta_W)=0.0019 may be achieved.Comment: To be Submitted to Phys. Rev.
Veterinary treatment in organic husbandry
The organic farming regulations put emphasis on the preservation of animal health by prophylaxis in the agriculture. The No 5 of the regulation EC 1804/99 (EC organic regulation) Appendix I B defines the veterinary treatments in organic animal husbandry. The veterinarian can use any medicine, which is effective for the indication and the animal species. If possible, effective homeopathics, phytotherapeutics or the like should have priority.
Problems of implementing the EC organic regulation into the daily farm practice arise mostly from the doubling of the withdrawal period and the restriction of the numbers of treatments. The strict ban on prophylactic treatments is not mentioned any longer in the new regulation 834/2007, which shall apply as from 1st January 2009.
Clarification of the guidelines for animal treatments in organic farming seems to be useful for farmers, veterinarians and boards of control
Using Reactors to Measure
A next-generation neutrino oscillation experiment using reactor neutrinos
could give important information on the size of mixing angle . The
motivation and goals for a new reactor measurement are discussed in the context
of other measurements using off-axis accelerator neutrino beams. The reactor
measurements give a clean measure of the mixing angle without ambiguities
associated with the size of the other mixing angles, matter effects, and
effects due to CP violation. The key question is whether a next-generation
experiment can reach the needed sensitivity goals to make a measurement for
at the 0.01 level. The limiting factors associated with
a reactor disappearance measurement are described with some ideas of how
sensitivities can be improved. Examples of possible experimental setups are
presented and compared with respect to cost and sensitivity
Protecting Rights, Preventing Windfalls: A Model for Harmonizing State and Federal Laws on Floating Liens
This Article examines the conflict between state law which permits the creation of security interests in a debtor\u27s after-acquired property--or floating liens --and federal bankruptcy law\u27s potential cutoff of many of those security interests. This conflict arises in virtually every bankruptcy case. However, because of ambiguous statutory language and a failure of the jurisprudence conceptual center. This Article argues that using a model of a debtor in liquidation to analyze the cutoff of floating liens would balance the underlying policy considerations and make judicial outcomes more predictable
Searching for BSM neutrino interactions in dark matter detectors
Neutrino interactions beyond the Standard Model (BSM) are theoretically well
motivated and have an important impact on the future precision measurement of
neutrino oscillation. In this work, we study the sensitivity of a
multi-ton-scale liquid Xenon dark matter detector equipped with an intense
radiative neutrino source to various BSM neutrino-electron interactions. We
consider the conventional Non-Standard Interactions (NSIs), other more
generalized four-fermion interactions including scalar and tensor forms, and
light-boson mediated interactions. The work shows that with realistic
experimental setups, one can achieve unprecedented sensitivity to these BSM
neutrino-electron interactions.Comment: fig. 7 added, matches the published versio
Combining dark matter detectors and electron-capture sources to hunt for new physics in the neutrino sector
In this letter we point out the possibility to study new physics in the
neutrino sector using dark matter detectors based on liquid xenon. These are
characterized by very good spatial resolution and extremely low thresholds for
electron recoil energies. When combined with a radioactive source, both
features in combination allow for a very competitive sensitivity to neutrino
magnetic moments and sterile neutrino oscillations. We find that, for realistic
values of detector size and source strength, the bound on the neutrino magnetic
moment can be improved by an order of magnitude with respect to the present
value. Regarding sterile neutrino searches, we find that most of the gallium
anomaly could be explored at the 95% confidence level just using shape
information.Comment: 5 pages, 2 figures. Minor modifications, references added. Version
accepted for publication in JHE
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