The results released at Neutrino 2016 are based on this data set, and highlighted here are the measurements of ν μ → ν μ (corresponding to muon-neutrino survival) and ν μ → ν e (electron-neutrino appearance). As of May 2016, the experiment has accumulated 16% of its planned total. NOvA has been collecting data with the NuMI beam since February 2014, and full operations began the following October upon completion of the far detector ( CERN Courier July/August 2014 p30). The detectors are identical in their structure, consisting of 4 × 6 cm liquid scintillator-filled PVC cells in alternating planes in order to provide two orthogonal 2D views of particle trajectories. NOvA’s 300 tonne near detector, which is located 1 km downstream of the neutrino source, measures the rate, energy spectrum and flavour composition of the neutrino beam prior to significant flavour oscillations, while the 14,000 tonne far detector is located 810 km downstream in northern Minnesota. NOvA was conceived to address these unknowns using two detectors together with the intense beam of muon neutrinos provided by Fermilab’s NuMI neutrino source. But is there a new symmetry that underlies this apparent ν μ/ν τ equality? And if the equality breaks down as measurements improve, which flavour will dominate? A third major unknown is whether neutrinos violate CP symmetry, as allowed by the complex phase δ of the leptonic mixing matrix. Past experimental data are consistent with ν 3 being equal parts ν μ and ν τ, in addition to a small amount of ν e. A second set of questions relate to the flavour admixture of the ν 3 state. The basic features of the three-flavour neutrino oscillation framework have been fleshed out, and the NOvA experiment in the US – which presented its latest results at the Neutrino 2016 conference in London earlier this month – is poised to address many of the remaining unknowns related to neutrino masses and their mixing.Īmong these is whether neutrinos obey a “normal” or “inverted” mass hierarchy: that is, whether the mass eigenstate with the least ν e content (called ν 3) is the heaviest or lightest of the three (see “A portal to new physics”). The breakthrough results from the Super-Kamiokande and SNO experiments, which showed that neutrinos oscillate between their three flavours, marked the start of nearly two decades of tremendous progress in neutrino physics. The NuMI horn at Fermilab, which focuses mesons produced in the target into a 675 m-long volume where they can decay to produce neutrinos. participation in international scientific efforts.Results shed light on the ordering of neutrino masses. Those awards include support for cooperative research with industry, Arctic and Antarctic research and operations, and U.S. Each year, NSF receives more than 40,000 competitive proposals and makes about 11,000 new awards. With a fiscal year 2022 budget of $8.8 billion, NSF funds reach all 50 states through grants to nearly 2,000 colleges, universities and institutions. as a global leader in research and innovation. NSF supports research and people by providing facilities, instruments and funding to support their ingenuity and sustain the U.S. National Science Foundation propels the nation forward by advancing fundamental research in all fields of science and engineering. The discovery could offer insight into fundamental neutrino properties such as mass and could help explain the dominance of matter in the universe. Iowa State University physicists are part of the huge NOvA Neutrino Experiment that just published two papers about the first experimental observations of muon neutrinos changing to electron neutrinos. Telephone numbers or other contact information mayīe out of date please see current contact information at media This material is available primarily for archival Office of Small and Disadvantaged Business Utilization (OSDBU).National Center for Science and Engineering Statistics (NCSES).Award Statistics (Budget Internet Info System).Proposal and Award Policies and Procedures Guide (PAPPG).Responsible and Ethical Conduct of Research.
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