Bulletin of the American Physical Society
Annual Meeting of the APS Four Corners Section
Volume 60, Number 11
Friday–Saturday, October 16–17, 2015; Tempe, Arizona
Session D7: Particle Physics II |
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Chair: William Fairbank, Colorado State University Room: MU207 |
Friday, October 16, 2015 1:50PM - 2:14PM |
D7.00001: MicroBooNE: An exploration of the properties of neutrinos, nucleons, and nuclei Invited Speaker: Stephen Pate MicroBooNE is a brand-new experiment at Fermi National Accelerator Laboratory in Batavia, Illinois, that will explore the phenomena of neutrino oscillations, as well as the structure of nucleons (protons and neutrons) and nuclei. A beam of neutrinos, with an average energy of about 1 GeV, will pass through the MicroBooNE apparatus on the Fermilab campus. The apparatus consists of a large liquid-argon time-projection chamber (LArTPC), with an active volume 10.4 meters in length along the beam direction, $2.3 \times 2.5$ meter$^2$ transverse to the beam, and containing 89 tons of liquid argon. The LArTPC technology allows for extremely detailed charge-particle tracking and calorimetry. In addition to the TPC, there are also 32 photo-multiplier tubes inside the cryostat to observe the very bright ultraviolet scintillation light produced by the passage of charged particles though liquid argon. The interactions recorded between the neutrino beam and the argon nuclei will provide us with new information about the fascinating phenomenon called ``neutrino oscillation" wherein a neutrino of one type (electron, muon, or tau) changes into a neutrino of another type as it travels through space. We will also use the neutrino beam as a probe of the internal structure of the protons and neutrons, exploring in particular the contribution of strange quarks to the intrinsic spin of the nucleon. In addition, it will also be possible to explore short-range correlations in the motion of protons and neutrons inside the argon nucleus. This talk will discuss these physics programs and review the current status of the MicroBooNE experiment. [Preview Abstract] |
Friday, October 16, 2015 2:14PM - 2:26PM |
D7.00002: Stopped Muon Monitoring at DUNE Andrew Loeliger DUNE is a next generation neutrino oscillation experiment with wide reaching physics goals. To monitor DUNE beam characteristics and predict both near and far detector fluxes, the Stopped Muon Monitor (SMM) is being developed to detect stopped tertiary muons. Recent work has established characteristics of the detector in the proposed beamline. Stand-alone monte carlo simulation of the SMM has been used to determine detector stopping efficiency. Further monte carlo simulation in the established DUNE beam monte carlo (G4LBNE), allowed study of distribution and timing of stopping muons within the proposed beamline. From these simulations details about specific detector response at given layers of shielding and distance from beam center has been characterized. Furthermore, information about detector response timing was derived from these results, and provides estimates about when we will see optimal detector response. This information will make it possible, in conjunction with further simulation of muon parent particles to come up with a comprehensive mathematical model to relate SMM response to neutrino flux in both the DUNE near and far detector. [Preview Abstract] |
Friday, October 16, 2015 2:26PM - 2:38PM |
D7.00003: Measuring the muon flux of neutrino beams with a novel Cherenkov detector Peter Madigan Beam-based neutrino experiments rely heavily on accurate estimates of the neutrino flux through multi-kiloton detectors, however these estimates rely heavily on Monte-Carlo models of hadronic interactions. In order to ground flux estimates in physical data, the by-product muon beam can be observed using modest detectors. Measurements of the muon flux can be used in conjunction with hadronic models to improve predictions of neutrino fluxes. This talk will introduce the efforts to measure the muon spectrum and divergence of the NuMI beam at Fermilab using a prototype gas Cherenkov detector system being developed for the future LBNF. [Preview Abstract] |
Friday, October 16, 2015 2:38PM - 3:02PM |
D7.00004: Review of Recent Long baseline Neutrino Oscillation Results Invited Speaker: Walter Toki Neutrino oscillations are the remarkable ability of neutrinos to "shapeshift" or metamorphose from one type or flavor into another as they travel through space. These oscillations are observed as neutrinos travel over hundreds of kilometers in two long baseline neutrino oscillation experiments; the T2K experiment at the Japan Proton Accelerator Research Center in Japan and the Nova experiment at Fermi National Laboratory near Chicago. This talk will review the nu$\_$mu $\rightarrow$ nu$\_$mu disappearance and the nu$\_$mu $\rightarrow$ nu$\_$e appearance oscillation results from T2K and Nova and the anti$\_$numu $\rightarrow$ anti$\_$nue results from T2K. These measurements are used to determine fundamental parameters of neutrino mixing. In addition, with more data, these experiments aim to search for charge-parity violations between neutrino and antineutrino oscillations where the oscillation rates would be different. The basic concepts of neutrino oscillations will be described and the most recent experimental results will be reviewed. [Preview Abstract] |
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