| Monday, October 16, 2023 |
| Nelson-Barr Models and Their Cosmology | |
| Qianshu Lu, New York University | |
| Event Type: CCPP Brown Bag | |
| Time: 12:30 PM - 1:30 PM | |
| Location: 726 Broadway, 940, CCPP Seminar | |
| Constraining supernovae models using gamma-ray deposition histories | |
| Amir Sharon, Weizmann Institute of Science | |
| Event Type: Informal Astro Talk | |
| Time: 2:00 PM - 3:15 PM | |
| Location: 726 Broadway, 940, CCPP Seminar | |
| Abstract: Supernovae explosions pose numerous challenges when modeling their complex and dynamic nature. I will propose a method to overcome one of the main obstacles in this regard - modeling the observed light through radiation transfer, which is inherently uncertain. The method capitalizes on the fact that the primary energy source of most supernovae consists of high-energy gamma rays emitted by the decay products of Ni56. By studying the incomplete energy deposition of these gamma-ray photons, we can calculate observables that can be derived easily from models utilizing basic, well-known physics. This approach can effectively limit and, in some cases, eliminate certain explosion models more robustly than conventional radiation transfer techniques. We have applied this methodology to various types of supernovae, and have found that in many instances, there are significant disparities between the models and the observations. Notably, this holds true for Type Ia supernovae, where all currently known models are in tension with the observed characteristics. | |
| Paper Review: "Monopoles, Scattering, and Generalized Symmetries" | |
| Zare | |
| Event Type: HEP Discussion Sessions | |
| Time: 2:00 PM - 3:50 PM | |
| Location: 726 Broadway, 902, Lg Conf | |
| Abstract: Link to article: https://arxiv.org/pdf/2306.07318.pdf Related papers: Monopole Catalysis of Skyrmion Decay (https://www.sciencedirect.com/science/article/pii/0550321384900889) ABJ Anomaly and Fermion-number Breaking in the Presence of a Magnetic Monopole (https://web.archive.org/web/20190303130030id_/http://pdfs.semanticscholar.org/b5f5/1493c61539558649ceb2d328f6058e6fa2f6.pdf) | |
| Double Scaled SYK and De Sitter Space | |
| Zoom Talk by Herman Verlinde, Princeton University | |
| Event Type: Informal HEP Talk | |
| Time: 5:00 PM - 6:00 PM | |
| Location: 726 Broadway, 940, CCPP Seminar | |