Date: Tuesday, March 11, 2014 - 3:30pm
Perturbative QCD is a powerful tool for calculating the properties of jets at the LHC. However, there are many jet observables for which non-perturbative input from QCD is needed. In this talk, I present three case studies at the boundary between perturbative and non-perturbative QCD---ratio observables, track-based measurements, and hadronization effects---all of which are relevant for new physics searches at the LHC.
Date: Tuesday, March 18, 2014 - 3:30pm
Hadronic many-body theory predicts a strong broadening of the rho-meson spectral
function in hot and dense matter, leading to a melting of its resonance structure
as the pseudo-critical temperature is approached from below. Pertinent calculations
of thermal dilepton spectra in heavy-ion collisions, which additionally include
radiation from the quark-gluon plasma phase, are largely consistent with experimental
measurements which now cover a rather large range of collision energies, from SPS to
Date: Tuesday, March 25, 2014 - 3:30pm
It is shown that the acoustic scaling patterns of anisotropic flow for different event shapes at a fixed collision centrality (shape-engineered events), provide robust constraints for the event-by-event fluctuations in the initial-state density distribution from ultrarelativistic heavy ion collisions. The empirical scaling parameters also provide a dual-path method for extracting the specific shear viscosity eta/s of the quark-gluon plasma (QGP) produced in these collisions.
Date: Wednesday, March 26, 2014 - 1:30am
This two-day / six-unit course will provide students with a basic introduction to Linux and Unix systems in use in many of the biological and computational research departments around campus. Attendees will have access to a Linux computational server to practice various tasks and perform labs in order to familiarize themselves with the environment. The class materials will cover a variety of tasks from those often considered simple, such as logging in, through more advanced tasks like building an application. The course includes lectures, informal Q & A, and hands-on activities/labs.
Date: Monday, March 31, 2014 - 3:30pm
"Topology and Quantum Entanglement in Condensed Matter Systems" - Quantum entanglement significantly enriches states of matter at zero temperature. Quantum many-body systems with a finite spectrum gap can be roughly categorized into two different classes: (1) long range entangled states with bulk topological degeneracy (e.g. fractional quantum Hall states); (2) short range entangled (SRE) states with a trivial bulk spectrum (but they can still have protected gapless edge states), such as the integer quantum Hall states, quantum spin Hall states, topological insulators, etc.
Date: Tuesday, April 1, 2014 - 1:30pm
I will report a complete lattice calculation of the quark and glue components of the proton momentum and angular momenta. Preliminary results on the quark spin contribution from the anomalous Ward identity will also be reported. Hadron mass can be decomposed in terms of the quark kinetic energy, quark condensate, glue component and the trace anomaly. Results of such a division for the pseudoscalar and vector mesons from light to charm quarks will be presented.
Date: Wednesday, April 2, 2014 - 3:30pm
Whether it¿s for applications that exploit the ultra-low energy scales, sensitivity, or complexity of quantum systems, quantum mechanics will play an ever increasing role in engineering. In the past decade, the nascent field of quantum engineering has produced quite good devices and clearer proposals for high level operations. What¿s less clear is what happens in between, in the realm of several interacting, modular quantum devices. In my opinion, tackling this regime will require finding quantum generalizations to electrical engineering concepts and techniques.
Date: Wednesday, April 9, 2014 - 3:30pm
The Memory of Sand: Complex systems are characterized by an abundance of meta-stable states. To describe such systems statistically, one must understand how states are sampled, a difficult task in general when thermal equilibrium does not apply. This problem arises in various fields of science, and here I will focus on a simple example, sand. Sand can flow until one jammed configuration (among the exponentially many possible ones) is reached.
Date: Thursday, April 10, 2014 - 3:30pm
Date: Tuesday, April 15, 2014 - 1:30pm
Date: Thursday, April 17, 2014 - 11:00am
We will discuss a correlation seen between the dark matter content and the ellipticity of elliptical galaxies. The analysis method for this investigation will be described and the origin of the correlation -whether it is physical or an observational/methodological bias- will be discussed. If of physical origin, the correlation found would imply that at equal luminosities, rounder medium-size elliptical galaxies appear to contain less dark matter than flatter elliptical galaxies. This would be puzzling in the context of the conventional model of cosmological structure formation.
Date: Friday, April 18, 2014 - 4:00pm
This course, which has as a prerequisite "Introduction to Unix" offered March 24&26 (or equivalent experience), provides an introduction to scientific computing using the Python programming language. The course covers basic data types, data structures, control flow statements, and commonly used functions from the Python standard library. We will also touch on popular third party libraries that provide facilities for efficient mathematical and statistical function, data visualization and plotting, and domain specific tasks (e.g. bioinformatics, image processing).
Date: Wednesday, April 23, 2014 - 3:30pm
Title and abstract forthcoming.
Faculty Host: Bob Behringer
Date: Tuesday, May 6, 2014 - 3:30pm