Events at Physics

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Events on Thursday, February 3rd, 2022

Public Research Seminar
Life in the Light: Photochemical Insights Towards Life as a Planetary Phenomenon
Time: 9:00 am - 10:00 am
Place: Wisconsin Institute of Discovery, Orchard Room
Speaker: Dr. Sukrit Ranjan, Northwestern University
Abstract: Advances in origins-of-life chemistry are transforming our understanding of how life emerged on Earth, while upcoming space missions and telescopes offer the prospect of detecting life on other worlds. Fundamental to both quests is interaction of UV radiation with molecular systems (photochemistry). Photochemistry controls the chemical context for the origin of life on Earth and influences the molecular signposts with which we hope to detect life elsewhere. I will share photochemical work which refines our understanding of early Earth environments, and demonstrate how such understanding enables assessment and improvement of theories of origins-of-life chemistry. I will discuss photochemical efforts to elucidate potential atmospheric biosignatures of life on other worlds, and show how the search for life on other worlds may enable tests of theories of the origin of life. In sum, I will review theoretical, experimental, and observational work towards understanding the origin and distribution of life in the universe through the lens of photochemistry.

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Host: Coco Zhang, UW Astronomy Department
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R. G. Herb Condensed Matter Seminar
Time: 10:00 am - 11:00 am
Speaker: Andrei Derevianko, University of Nevada, Reno
Abstract: CANCELLED.
Host: Mark Saffman
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NPAC (Nuclear/Particle/Astro/Cosmo) Forum
Recent Results from MicroBooNE Addressing the MiniBooNE Anomaly Using Deep-Learning-Based Reconstruction
Time: 2:30 pm - 3:30 pm
Place: Chamberlin 4274 (or
Speaker: Lauren Yates, Fermilab
Abstract: The MicroBooNE experiment uses a liquid argon time projection chamber (LArTPC) located on-axis in the Booster Neutrino Beam at Fermilab to perform a wide variety of physics measurements. Recently, MicroBooNE released its first results addressing the nature of the anomalous excess of low-energy interactions previously observed by the MiniBooNE collaboration. This seminar will focus on an approach that isolates electron neutrino interactions consistent with the kinematics of charged-current quasi-elastic (CCQE) events. The topology of such signal events has a final state with one electron and one proton (1e1p). Multiple novel techniques are employed to identify a 1e1p final state, including particle identification that uses two methods of deep-learning-based LArTPC image analysis and event selection using a boosted decision-tree ensemble trained to recognize two-body scattering kinematics.
Host: Lu Lu
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R. G. Herb Condensed Matter Seminar
Time: 4:00 pm - 5:00 pm
Place: Cancelled
Speaker: Justyna Zwolak, NIST
Abstract: Cancelled
Host: Mark Eriksson
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