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Events at Physics

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Events on Thursday, February 20th, 2020

Atomic Physics Seminar
QC Cluster Seminar
Time: 10:00 am
Place: 5310 Chamberlin Hall
Speaker: Jake Covey, California Institute of Technology
Abstract: tbd
Host: Mark Saffman
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NPAC (Nuclear/Particle/Astro/Cosmo) Forum
The TeV-PeV Diffuse Neutrino Background
Time: 2:00 pm
Place: 4274 Chamberlin Hall
Speaker: Nathan Whitehorn, UCLA
Abstract: In 2014, the IceCube Neutrino Observatory announced the discovery of an isotropic, isoflavor diffuse background of neutrinos with energies extending from 10 TeV to well above 1 PeV, presumably associated with the unknown emitters of high-energy cosmic rays. Six years later, the origin of these neutrinos remains a mystery. The background is, within measurement uncertainties, uncorrelated with any of the standard catalog of high-energy sources (our galaxy, blazars, gamma-ray bursts, etc.), challenging explanations involving simple models. The 2017 detection of neutrino emission from the distant blazar TXS 0506+056 has only deepened this mystery. In this talk, I will discuss the current state of our knowledge of the high-energy neutrino sky and outline the next steps in the experimental program to resolve these questions.
Host: Albrecht Karle
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PGSC Professional Development Seminar
How to Get the Most out of Academic Articles
Time: 2:30 pm
Place: 5310 Chamberlin Hall
Speaker: Alex Pizzuto, Physics Graduate Student
Abstract: Getting all the information out of a dense academic article is a challenge no matter what point you’re at in your physics career. Even if you’re reading a paper very close to your field, language, figures, and presentation style can act as barriers to understanding the take-home message of the work. I’ll cover strategies for approaching articles geared towards overcoming these barriers. You’ll improve your research efficiency by being able to interpret the motivations, methods, results, and implications of an article after a 5-minute read.
Host: Rob Morgan, graduate student
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Theory Seminar (High Energy/Cosmology)
Future cosmology with CMB lensing and galaxy clustering
Time: 4:00 pm
Place: 5280 Chamberlin
Speaker: Marcel Schmittfull, Institute for Advanced Study
Abstract: Next-generation Cosmic Microwave Background experiments such as the Simons Observatory, CMB-S4 and PICO aim to measure gravitational lensing of the Cosmic Microwave Background an order of magnitude better than current experiments. The lensing signal will be highly correlated with measurements of galaxy clustering from next-generation galaxy surveys such as LSST. This will help us understand whether cosmic inflation was driven by a single field or by multiple fields. It will also allow us to accurately measure the growth of structure as a function of time, which is a powerful probe of dark energy and the sum of neutrino masses. I will discuss the prospects for this, as well as recent progress on the theoretical modeling of galaxy clustering, which is key to realize the full potential of these anticipated datasets.
Host: Dan Chung
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