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January 2021

Special RPM-Berkeley Cosmology Seminar | Sihan Yuan (Harvard University) Tackling the challenges of galaxy-dark matter connection modeling and secondary bias

January 19 @ 1:10 pm - 2:10 pm
Zoom Talk, 50A-5132
Berkeley, ca 94720
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Abstract:  Modeling galaxy-dark matter connection is essential in deriving unbiased cosmological constraints from galaxy clustering observations. We show that a more physically motivated galaxy-dark matter incorporating secondary biases can result in more accurate predictions of galaxy clustering, and that it significantly reduces the tension in galaxy lensing. We further present progress in building a galaxy-dark matter connection framework that is rich in features and highly efficient in evaluation, enabling more robust cosmological analyses with upcoming DESI data. ────────── Troy Cortez…

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Kevin Woods (Stoney Brook University) “Measuring neutrino oscillations with accelerator-based, long-baseline experiments”

January 19 @ 4:00 pm - 5:00 pm
Zoom Talk, 50A-5132
Berkeley, ca 94720
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Abstract:  Accelerator-based, long-baseline neutrino oscillation experiments are uniquely positioned to explore the CP-violating nature of the neutrino sector. This talk will briey discuss the experimental technique before surveying selected topics spanning both current and future generations of such experiments. First, the Bayesian Markov Chain Monte Carlo oscillation analysis of the T2K experiment, which has been accumulating data for the past 10 years, will be presented before discussing the ongoing efforts to extend the analysis framework to be used in a…

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Kathryn Sutton (Columbia University Department of Physics) “MicroBooNE’s Search for a Photon-Like Low Energy Excess”

January 21 @ 4:00 pm - 5:00 pm
Zoom Talk, 50A-5132
Berkeley, ca 94720
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Abstract:  MicroBooNE is a Liquid Argon Time Projection Chamber (LArTPC) detector and is the first of three such detectors to be commissioned as part of the Short Baseline Neutrino (SBN) program at Fermilab (FNAL), and has been taking data since 2015. One of its primary goals is to investigate the unexplained excess of electromagnetic events in the lowest energy ranges observed in the same neutrino beamline at the MiniBooNE experiment. While one leading interpretation of this anomaly is electron neutrino appearance due to sterile neutrino…

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