Event Category: 4D Seminar

4D Seminar series:
Monday at 2:30 on campus

–

Abstract: What does a collection of interacting rigid tops have in common with the gauge theories that describe our fundamental theories of nature? The answer is: their Hilbert space! In this talk I will go over a basic exercise in quantum mechanics, which is finding the energies and eigenfunctions of a free rigid top. This alone is of interest in … Read More

–

We propose a new method to regulate the motion of test masses in GR as the point particle limit of classical field equations. First, we explore the inter-relations between classical field solutions in a background metric and the Hamilton-Jacobi action for geodesic motion. We then show how to directly extract the scattering angle for a point particle from the partial wave expansion for field scattering, by … Read More

–

Abstract: As requested, I’ll start my talk with a “brief” introduction to myself, and my past and current research interests, and then transition to focusing on one specific project about millicharged DM. The abstract for that second part is: The possibility of having DM (or a fraction of it) charged under a dark U(1) which mixes with the U(1)EM has … Read More

–

Abstract: Axion dark matter which couples to fermions can act as an effective magnetic field, the “axion wind”, inducing spin precession in condensed matter systems. I will describe a new proposal for axion wind detection using an unusual phase of superfluid helium-3, the homogeneous precession domain (HPD). In the HPD, spins precess coherently over a macroscopic volume even in the … Read More

–

Constraints on decaying dark matter are extremely strong. However, if one relaxes the condition that a given species of particle makes up all of dark matter, existing searches for decaying dark matter can be converted into searches for other BSM particles which make up only a fraction of the dark matter relic abundance. For many light BSM particles there exists a freeze-in relic … Read More

–

Abstract: Dark Photon Dark matter and Millicharged particle dark matter are two of the simplest and popular models of dark matter and are looked for in various experiments. Yet, there continue to exist inaccessible regions in interaction and mass parameter space for these models. In this talk I propose a new way to detect the dark electric fields produced by … Read More

–

Abstract: After a quick introduction about my self I will discuss neutral gauge boson (Z’) extensions of the SM in the context of neutral current B decays and the Electroweak Precision Observables. Z’ bosons are naturally predicted within several extensions of the SM and the current tensions between theoretical predictions and experimental observations, in different sectors of physics, strongly motivate … Read More

–

  Radha Mastandrea Abstract: Resonant anomaly detection is a promising framework for model-independent searches for new particles. Weakly supervised resonant anomaly detection methods compare data with a potential signal against a template of the Standard Model (SM) background inferred from sideband regions. We propose a means to generate this background template that uses a normalizing flow to create a mapping between … Read More