Events Daily

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

Link to the Event Video

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"
Event Type: HEP Discussion Sessions
Time: 2:00 PM - 3:50 PM
Location: 726 Broadway, 902, Lg Conf
Abstract: Link to article: Related papers: Monopole Catalysis of Skyrmion Decay ( ABJ Anomaly and Fermion-number Breaking in the Presence of a Magnetic Monopole (

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