Speaker: Tim Tait
Title: An Early Cosmological Phase of QCD Confinement
Host: Da Liu
Zoom: https://zoom.us/j/186024391
Abstract:
I will investigate BSM physics which enables the possibility that there is an early epoch in the cosmological evolution of the Universe in which QCD is confined at a high scale. Some possible applications to explain the baryon asymmetry of the Universe and/or the freeze-out of dark matter will also be mentioned.
Description:
Cinco de Mayo
User:
High-Energy Seminars
Time:
1:30pm - 2:30pm
Send Reminder:
Yes - 0 days 4 hour 0 minutes before start
Description:
Speaker: Jack Collins
Title: Representation Learning for Collider Events
Host: Da Liu
Zoom: https://zoom.us/j/186024391
Abstract:
Collider events, when imbued with a metric which characterizes the 'distance' between two events, can be thought of as populating a data manifold in a metric space. The geometric properties of this manifold reflect the physics encoded in the distance metric. I will show how the geometry of collider events can be probed using a class of machine learning architectures called Variational Autoencoders.
User:
High-Energy Seminars
Time:
1:30pm - 2:30pm
Send Reminder:
Yes - 0 days 4 hour 0 minutes before start
Description:
Speaker:
Title:
Host: Da Liu
Zoom: https://zoom.us/j/186024391
Speaker: Bob Wilson, Colorado State University
Host: Bob Svoboda
Abstract:Forty years ago as an undergraduate contemplating graduate school in high energy physics, I declined a research assistantship to work on a neutrino experiment because neutrinos weren't interesting ... massless, weakly interacting so barely any events to analyze even in massive detectors, and all you got for your effort were structure functions. How things have changed. The more we learn, the more we realize that there is more to know about neutrinos, the most abundant matter particle in the universe. In the decades since my naïve snubbing of this intriguing particle we have developed a well-established three-flavor paradigm that may help explain the matter-antimatter asymmetry of the universe. But beyond that, a few intriguing measurement "anomalies" hint at the existence of something stranger still, a neutrino that does not interact via any known forces except gravity, a sterile neutrino.
I will give a brief introduction to measurements from mega-Curie radioactive sources, nuclear reactors, and accelerators that motivated a definitive search for sterile neutrinos with a mass in the 1 eV range – the Short-Baseline Neutrino program at Fermi National Accelerator Laboratory. I will describe the two detectors that will provide a measurement of the appearance of electron-type neutrinos in a muon-type neutrino beam using massive liquid argon time-projection chambers with an emphasis on the 760-ton far detector developed by the ICARUS collaboration. This detector first demonstrated the viability of the technology for large-scale experiments such as the Deep Underground Neutrino Experiment (DUNE) mega-project.
