Bulletin of the American Physical Society
APS April Meeting 2013
Volume 58, Number 4
Saturday–Tuesday, April 13–16, 2013; Denver, Colorado
Session R11: Mini-Symposium on Neutrino Interactions |
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Sponsoring Units: DPF DNP Chair: Geralyn Zeller, Fermi National Accelerator Laboratory Room: Governor's Square 17 |
Monday, April 15, 2013 1:30PM - 1:57PM |
R11.00001: Overview of and motivations for studying neutrino interactions Invited Speaker: Morgan Wascko The discovery of neutrino mass and mixing is the first confirmed observation of phenomena not allowed by the standard model of particle physics. The ``next next generation'' of accelerator neutrino experiments will be focussed on the dual goals of searching for CP violation in leptons and measuring the neutrino mass hierarchy---but only if we can improve our understanding of neutrino-nucleus interactions. Recent cross-section measurements near 1 GeV have shown the conventional models for neutrino-nucleus scattering differ from nature in rates and kinematics of final state particles, and that discrepancies can be as large as 30\%. Accelerator neutrino oscillation experiments, inherently wide-band, rely on comparisons of event rates at near and far detectors to extract oscillation parameters. Thus it is crucial that any possible differences in event rates or kinematics not due to neutrino oscillations be well understood. Poor modelling of neutrino interactions leads to incorrect predictions of event background rates as well as errors in neutrino energy reconstruction, and these errors will cause biases in the extraction of oscillation parameters. More importantly for the CP violation search, there may be un-modelled differences in $\nu_{\mu}$ and $\nu_e$ cross sections. [Preview Abstract] |
Monday, April 15, 2013 1:57PM - 2:24PM |
R11.00002: Recent Results from Neutrino Experiments Invited Speaker: Gabriel Perdue Recent developments in neutrino-nucleus scattering measurements will be discussed. The emphasis will be on new experimental results, with a special focus on open questions and areas of active research. The discussion will highlight the different challenges and techniques of modern neutrino interaction experiments. Between MINER$\nu$A, T2K, MiniBooNE, SciBooNE, MINOS and ArgoNeut there is a wealth of new data that are available, data which are already improving our understanding of neutrino interactions. [Preview Abstract] |
Monday, April 15, 2013 2:24PM - 2:51PM |
R11.00003: Neutrino interactions in the nuclear environment Invited Speaker: Misak Sargsian I will discuss two aspects of neutrino-nuclei interactions. First, how the knowledge of nuclear structure gained in electro-nuclear processes can help to improve the accuracies of neutrino interaction cross sections both in quasi-elastic and deep-inelastic kinematics. And secondly the potential of neutrino- nuclear scattering processes to study hadrons in the nuclear medium. One new direction of nuclear medium studies is the verification of the recent theoretical observation that protons are more energetic than neutrons in large A asymmetric nuclei. If the nuclear modification is related to the virtuality of bound nucleon then it follows from the above observation that proton structure modification should increase with nuclear asymmetry at large A. The possibility of selecting the protons from nuclear target gives an important advantage of neutrinos for probing such modifications. [Preview Abstract] |
Monday, April 15, 2013 2:51PM - 3:18PM |
R11.00004: Electron Scattering Measurements applied to Neutrino Interactions on Nuclei Invited Speaker: M. Eric Christy The extraction of neutrino mass differences and flavor mixing parameters from oscillation experiments requires models of neutrino-nucleus scattering as input. With the reduction of other systematics, the uncertainties stemming from such models are expected to be one of the larger contributions to the systematic uncertainties for next generation oscillation experiments. The neutrino energy range sensitive to oscillations in long baseline experiments is typically the few GeV range, where the interactions with the nucleus and the subsequent production and propagation of hadrons within the nucleus is in the regime studied by nuclear physics experiments at facilities such as Jefferson Lab. While processes such as resonance production have been well studied in electron scattering, there is currently precious little corresponding data from neutrino scattering. Results from electron scattering experiments, therefore, have an important role to play in both building and constraining models for neutrino scattering. On the other hand, the study of nucleon structure via weak probes is very complementary to the program at Jefferson Lab utilizing electromagnetic probes. Neutrino scattering experiments such at MINERvA are expected to provide new experimental information on axial elastic and resonance transition form factors and on medium modifications via the axial coupling. This talk will focus on the application of electron scattering measurements to neutrino interactions on nuclei, but will also touch on where neutrino scattering measurements can add to our understanding of the nucleus. [Preview Abstract] |
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