929 research outputs found
DUNE sensitivities to the mixing between sterile and tau neutrinos
Light sterile neutrinos can be probed in a number of ways, including
electroweak decays, cosmology and neutrino oscillation experiments. At
long-baseline experiments, the neutral-current data is directly sensitive to
the presence of light sterile neutrinos: once the active neutrinos have
oscillated into a sterile state, a depletion in the neutral-current data sample
is expected since they do not interact with the boson. This channel offers
a direct avenue to probe the mixing between a sterile neutrino and the tau
neutrino, which remains largely unconstrained by current data. In this work, we
study the potential of the DUNE experiment to constrain the mixing angle which
parametrizes this mixing, , through the observation of
neutral-current events at the far detector. We find that DUNE will be able to
improve significantly over current constraints thanks to its large statistics
and excellent discrimination between neutral- and charged-current events.Comment: 18 pages, 5 figure
Qualitative Study of Current and Prospective Student Perceptions of a University Website
Building a sustainable system that goes beyond myopic interests and short-term policies is an arduous task for any school leader. In the U.S., our education system has been criticized for being too shallow in curriculum and unsustainable in the long run. In fact, a 2007 report by UNICEF concerning children’s well-being in 22 countries ranked the U.K. and the U.S. at the bottom of the industrialized nations in the survey. Hargreaves (2007) laments that these two countries, in their single-minded pursuit of economic competitiveness and development at all costs, are destroying the planet, while “eating their young.
DUNE sensitivities to the mixing between sterile and tau neutrinos
FAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOLight sterile neutrinos can be probed in a number of ways, including electroweak decays, cosmology and neutrino oscillation experiments. At long-baseline experiments, the neutral-current data is directly sensitive to the presence of light sterile neutrinos: once the active neutrinos have oscillated into a sterile state, a depletion in the neutral-current data sample is expected since they do not interact with the Z boson. This channel offers a direct avenue to probe the mixing between a sterile neutrino and the tau neutrino, which is currently only weakly constrained by current data from SuperK, IceCube and NOvA, however, these constrains will continue to improve as more data is collected by these experiments. In this work, we study the potential of the DUNE experiment to constrain the mixing angle which parametrizes this mixing, theta(34), through the observation of neutral-current events at the far detector. We find that DUNE will be able to improve significantly over current constraints thanks to its large statistics and excellent discrimination between neutral- and charged-current events.7122FAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOFAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO2014/19164-62017/01749-6Agências de fomento estrangeiras apoiaram essa pesquisa, mais informações acesse artig
EURONU WP6 2009 yearly report: Update of the physics potential of Nufact, superbeams and betabeams
Many studies in the last ten years have shown that we can measure the unknown
angle theta13, discover leptonic CP violation and determine the neutrino
hierarchy in more precise neutrino oscillation experiments, searching for the
subleading channel nue -> numu in the atmospheric range. In this first report
of WP6 activities the following new results are reviewed: (1) Re-evaluation of
the physics reach of the upcoming generation of experiments to measure theta13
and delta; (2) New tools to explore a larger parameter space as needed beyond
the standard scenario; (3) Neutrino Factory: (a) evaluation of the physics
reach of a Nufact regards sterile neutrinos; (b) evaluation of the physics
reach of a Nufact as regards non-standard interactions; (c) evaluation of the
physics reach of a Nufact as regards violation of unitarity; (d) critical
assessment on long baseline tau-detection at Nufact; (e) new physics searches
at a near detector in a Nufact; (4) Beta-beams: (a) choice of ions and location
for a gamma = 100 CERN-based beta-beam; (b) re-evaluation of atmospheric
neutrino background for the gamma = 100 beta-beam scenario; (c) study of a two
baseline beta-beam; (d) measuring absolute neutrino mass with beta-beams; (e)
progress on monochromatic beta-beams; (5) Update of the physics potential of
the SPL super-beam. Eventually, we present an updated comparison of the
sensitivity to theta13, delta and the neutrino mass hierarchy of several of the
different proposed facilities.Comment: 2009 Yearly report of the Working Package 6 (Physics) of the EUROnu
FP7 EU project. 55 pages, 21 figures
Analysis of the calculation of the amplitude of accommodation
The push-up method is routinely used to measure the amplitude of accommodation. In this method the diopter value corresponding to the nearest point that the eye can focus is determined, wearing his neutralizing lens, but not the value of the maximum diopter variation that makes the eye. The aim of this paper is to review the calculation described in the push-up method taking into account the real position of the near point of the eye. In the subjective push-up method, it is calculated the reciprocal of the distance from the lens until the test object at this position of first, slight, sustained blur. We calculated the differences between this value and the ocular amplitude of accommodation, taking into account that the eye is really looking at the image of first blur through the neutralizing lens. Experimental measurements were also taken to determine whether they were similar to theoretical values. The results obtained by the two calculation methods compared were in general significantly different and the difference was greater for young people with high ametropy. The theoretical results were in agreement with the experimental ones. According to the optometric information required must select the appropriate calculation method, since the values obtained in each of them are not comparable
An Early Cretaceous, medium-sized carcharodontosaurid theropod (Dinosauria, Saurischia) from the Mulichinco Formation (upper Valanginian), Neuquén Province, Patagonia, Argentina
A new carcharodontosaurid taxon, Lajasvenator ascheriae gen. et sp. nov. is described. The new taxon is based on two specimens: MLL-PV-Pv-005 is a partial skeleton represented by a portion of the snout, partially articulated presacral vertebral series, four articulated caudal vertebra and fragments of the pelvic girdle; MLL-PV-Pv-007 includes the anterior ends of both dentaries, a quadratojugal, and fragments of cervical vertebrae, ribs and a possible tarsal bone. Lajasvenator is unique in having anterior projections on cervical prezygapophyses, lip-like crests on the lateral surfaces of cervical postzygapophyses, and bilobed anterior processes on cervical ribs. Lajasvenator material was collected from the terrestrial sandstones of the Valanginian Mulichinco Formation. It is the oldest carcharodontosaurid record from South America. This medium sized theropod was found associated with remains of the dicraeosaurid sauropod Pilmatueia, indeterminate diplodocid remains, and a yet unidentified iguanodontian-like ornithopod.Fil: Coria, Rodolfo Anibal. Provincia del Neuquén. Municipalidad de Plaza Huincul. Museo "Carmen Funes"; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Currie, Philip J.. University of Alberta; CanadáFil: Ortega Coloma, Francisco. Universidad Nacional de Educación a Distancia; EspañaFil: Baiano, Mattia Antonio. Provincia del Neuquén. Municipalidad de Plaza Huincul. Museo "Carmen Funes"; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; Argentin
The potential economic development opportunities of Tren Urbano
Thesis (M.C.P.)--Massachusetts Institute of Technology, Dept. of Urban Studies and Planning, 1998; and, Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1988.Includes bibliographical references (p. 227-234).by Daniel J. Freire Coloma.M.S.M.C.P
Analysis of Technological Innovation Contribution to Gross Domestic Product Based on Neutrosophic Cognitive Maps and Neutrosophic Numbers
GeV-scale neutrinos: interactions with mesons and DUNE sensitivity
The simplest extension of the SM to account for the observed neutrino masses
and mixings is the addition of at least two singlet fermions (or right-handed
neutrinos). If their masses lie at or below the GeV scale, such new fermions
would be produced in meson decays. Similarly, provided they are sufficiently
heavy, their decay channels may involve mesons in the final state. Although the
couplings between mesons and heavy neutrinos have been computed previously,
significant discrepancies can be found in the literature. The aim of this paper
is to clarify such discrepancies and provide consistent expressions for all
relevant effective operators involving mesons with masses up to 2 GeV.
Moreover, the effective Lagrangians obtained for both the Dirac and Majorana
scenarios are made publicly available as FeynRules models so that fully
differential event distributions can be easily simulated. As an application of
our setup, we numerically compute the expected sensitivity of the DUNE near
detector to these heavy neutral leptons.Comment: v4: Minor updates and text modifications. Published in EPJC.
FeynRules models performance improved, B mesons include
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