28 research outputs found

    Low exposure long-baseline neutrino oscillation sensitivity of the DUNE experiment

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    The Deep Underground Neutrino Experiment (DUNE) will produce world-leading neutrino oscillation measurements over the lifetime of the experiment. In this work, we explore DUNE\u27s sensitivity to observe charge-parity violation (CPV) in the neutrino sector, and to resolve the mass ordering, for exposures of up to 100 kiloton-megawatt-calendar years (kt-MW-CY), where calendar years include an assumption of 57% accelerator uptime based on past accelerator performance at Fermilab. The analysis includes detailed uncertainties on the flux prediction, the neutrino interaction model, and detector effects. We demonstrate that DUNE will be able to unambiguously resolve the neutrino mass ordering at a 4σ (5σ) level with a 66 (100) kt-MW-CY far detector exposure, and has the ability to make strong statements at significantly shorter exposures depending on the true value of other oscillation parameters, with a median sensitivity of 3σ for almost all true δCP values after only 24 kt-MW-CY. We also show that DUNE has the potential to make a robust measurement of CPV at a 3σ level with a 100 kt-MW-CY exposure for the maximally CP-violating values δCP=±π/2. Additionally, the dependence of DUNE\u27s sensitivity on the exposure taken in neutrino-enhanced and antineutrino-enhanced running is discussed. An equal fraction of exposure taken in each beam mode is found to be close to optimal when considered over the entire space of interest

    Light Dark Matter in the NO{ν\nu}A Near Detector: First Look at the New Data

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    The neutrino oscillations experiment NO{ν\nu}A is the flagship of Fermi National Laboratory. The neutrino source NuMI is delivering record numbers of protons-on-target surpassing the most stringent dark matter production upper limits of current models in the under-10 GeV mass range. We take advantage of the sophisticated particle identification algorithms of the experiment to interrogate the data from the 300-ton, off-axis, low-Z, Near Detector of NOvA during the first physics runs. We search for signatures of sub-GeV or Light Dark Matter (LDM), Axion-like-particles, and Heavy or Sterile Neutrinos that may scatter or decay in the volume of the detector

    Reflections on the Physics and Astronomy Student Reading Society (PhASRS) at San Jos\'e State University

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    The COVID-19 pandemic imposed profound changes on the way we engage in undergraduate physics education. Online courses became mainstream. Exam formats were re-imagined. Classroom demonstrations were swapped out in favor of video clip showings. Digital whiteboards replaced face-to-face discussions. Laboratory classes were outfitted with home-delivered supply kits. And all of us developed a more intimate knowledge of Greek letters and symbols (delta, omicron, etc.) than we might comfortably like to admit. Having weathered these transformations from the point of view of both an undergraduate student (S.L.J.) and classroom instructor (A.H. and C.L.S.), we have found that among the most challenging aspects of the in-person learning experience to replicate in an online environment have been the relational ones. To highlight some of the ways in which this issue can be mitigated, we report here on the activities of the San Jos\'e State University (SJSU) Physics and Astronomy Student Reading Society (PhASRS), which was an online reading group at SJSU founded by ourselves and others running from the summer of 2020 until the end of the fall 2020 semester. Elements of the reading group's structure and guiding principles are described, as well as student and faculty reflections on what worked well and what did not. Our hope is that this summary of activities will inspire faculty members and students at colleges and perhaps high schools to imagine new possibilities for developing communities of people in science that might not otherwise be able to exist.Comment: 5 pages, 2 figures. Submitted to The Physics Teache

    Search for Hidden Sector and Dark Matter Particles produced at Fermilab's NuMI Target

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    In the long tradition of exotic searches at fixed-target experiments, we plan to use the NuMI beam-target and the NOvA Near Detector to observe potential signatures of Hidden Sector or Dark Matter particles, either directly produced within the target or through theoretically postulated mediators. Expecting mostly scattering events on electrons or nucleons as their signatures, an example of a mediator generated scalar dark matter particles is used to discuss the target production profile of a dark matter beam. This channel explores the capabilities of the detector to observe neutral-current events from electron-neutrino scattering interactions

    The present and future status of heavy neutral leptons

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    The existence of nonzero neutrino masses points to the likely existence of multiple Standard Model neutral fermions. When such states are heavy enough that they cannot be produced in oscillations, they are referred to as heavy neutral leptons (HNLs). In this white paper, we discuss the present experimental status of HNLs including colliders, beta decay, accelerators, as well as astrophysical and cosmological impacts. We discuss the importance of continuing to search for HNLs, and its potential impact on our understanding of key fundamental questions, and additionally we outline the future prospects for next-generation future experiments or upcoming accelerator run scenarios
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