4,025 research outputs found
A Sterile Neutrino Search with Kaon Decay-at-rest
Monoenergetic muon neutrinos (235.5 MeV) from positive kaon decay-at-rest are
considered as a source for an electron neutrino appearance search. In
combination with a liquid argon time projection chamber based detector, such a
source could provide discovery-level sensitivity to the neutrino oscillation
parameter space indicative of a sterile neutrino. Current and future intense >3
GeV kinetic energy proton facilities around the world can be employed for this
experimental concept.Comment: 6 pages, 6 figure
Annual Modulation of Cosmic Relic Neutrinos
The cosmic neutrino background (CvB), produced about one second after the Big
Bang, permeates the Universe today. New technological advancements make
neutrino capture on beta-decaying nuclei (NCB) a clear path forward towards the
detection of the CvB. We show that gravitational focusing by the Sun causes the
expected neutrino capture rate to modulate annually. The amplitude and phase of
the modulation depend on the phase-space distribution of the local neutrino
background, which is perturbed by structure formation. These results also apply
to searches for sterile neutrinos at NCB experiments. Gravitational focusing is
the only source of modulation for neutrino capture experiments, in contrast to
dark-matter direct-detection searches where the Earth's time-dependent velocity
relative to the Sun also plays a role.Comment: 6 pages, 2 figure
Conventional Versus Nuclear Power for CVA-67: A Study of Defense Management
In recent years Robert McNamara and the revolutionary methods he brought with him to DOD have been the focus of considerable dissatisfaction voiced by military men as well as civilian critics of the Defense Establishment
Coherent Neutrino Scattering in Dark Matter Detectors
Coherent elastic neutrino- and WIMP-nucleus interaction signatures are
expected to be quite similar. This paper discusses how a next generation
ton-scale dark matter detector could discover neutrino-nucleus coherent
scattering, a precisely-predicted Standard Model process. A high intensity
pion- and muon- decay-at-rest neutrino source recently proposed for oscillation
physics at underground laboratories would provide the neutrinos for these
measurements. In this paper, we calculate raw rates for various target
materials commonly used in dark matter detectors and show that discovery of
this interaction is possible with a 2 tonyear GEODM exposure in an
optimistic energy threshold and efficiency scenario. We also study the effects
of the neutrino source on WIMP sensitivity and discuss the modulated neutrino
signal as a sensitivity/consistency check between different dark matter
experiments at DUSEL. Furthermore, we consider the possibility of coherent
neutrino physics with a GEODM module placed within tens of meters of the
neutrino source.Comment: 8 pages, 4 figure
Cyclotrons as Drivers for Precision Neutrino Measurements
As we enter the age of precision measurement in neutrino physics, improved
flux sources are required. These must have a well-defined flavor content with
energies in ranges where backgrounds are low and cross section knowledge is
high. Very few sources of neutrinos can meet these requirements. However,
pion/muon and isotope decay-at-rest sources qualify. The ideal drivers for
decay-at-rest sources are cyclotron accelerators, which are compact and
relatively inexpensive. This paper describes a scheme to produce decay-at-rest
sources driven by such cyclotrons, developed within the DAEdALUS program.
Examples of the value of the high precision beams for pursuing Beyond Standard
Model interactions are reviewed. New results on a combined DAEdALUS--Hyper-K
search for CP-violation that achieve errors on the mixing matrix parameter of 4
degrees to 12 degrees are presented.Comment: This paper was invited by the journal Advances in High Energy Physics
for their upcoming special issue on "Neutrino Masses and Oscillations," which
will be published on the 100th anniversary of Pontecorvo's birt
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