Joint Theory Seminar
Speaker:
Title:
Host:
Room: 432
Abstract:
User:
High-Energy Seminars
Time:
9:00am - 10:00am
Description:
HE Seminar
Speaker:
Title:
Host:
Room: 432
Abstract:
User:
High-Energy Seminars
Time:
8:10am - 9:00am
Send Reminder:
Yes - 2 days 4 hour 0 minutes before start
Description:
Colloquium
Speaker: Leonardo Rastelli
Title: Charting the space of quantum field theories
Host: Luty
Room: 432
Abstract: Quantum field theory (QFT) is the mathematical language of all of fundamental physics (bar gravity). Despite its tremendous success, the conventional framework of QFT (based on Lagrangians and Feynman diagrammatics) does not do justice to the beautiful underlying structure of the theory, hiding many symmetries and non-perturbative dualities. In this colloquium I will outline some recent advances that point towards deeper and more effective reformulations of QFT. I will emphasize the idea of theory space and the power of a more abstract algebraic viewpoint. I will give two (related) illustrations of these general principles: the modern bootstrap approach to conformal field theories, and the surprising dualities tied to the existence of a mysterious six- dimensional theory known as the (2, 0) theory.
User:
High-Energy Seminars
Time:
5:10am - 6:10am
Description:
Special Joint Theory Seminar
Speaker: Leonardo Rastelli
Title: The Superconformal Bootstrap Program
Host: Luty
Room: 432
Abstract: I will outline the modern bootstrap program for four- and six-dimensional theories with extended superconformal symmetry. The bootstrap equations neatly split into two classes. There are minibootstrap equations for supersymmetric quantities, which can be solved analytically, and full-fledged bootstrap equations for non-protected quantities, which can be studied numerically. The entire program relies on general symmetry principles, with no need for "fields" or Lagrangians.
User:
High-Energy Seminars
Time:
8:00am - 9:00am
Description:
HE Seminar
Speaker: Scott Stephenson
Title: Searching for dark matter with the PandaX experiment
Host: Mani Tripathi
Room: 432
Abstract: Much evidence has amassed for the existence of a large nonbaryonic component of matter in the universe, termed dark matter (DM). The dark matter content of our own Milky Way galaxy allows for the possibility of direct detection of DM particles using sensitive earth-borne detectors. In search of DM, the PandaX collaboration has operated a low background, high sensitivity liquid xenon detector at China JinPing Laboratory in the Sichuan province of south-west China. The location of PandaX-I in the world's deepest underground lab protects the detector from cosmic radiation while the target of scintillating liquid xenon probes the existence of a large class of weakly interacting massive particle (WIMP) dark matter candidates. I will discuss the first dark matter search result from the PandaX-I detector, achieved during 17.4 live days operation with a target of 37 kg fiducial mass, and compare it with existing world-data.
User:
High-Energy Seminars
Time:
4:10am - 5:10am
Send Reminder:
Yes - 1 day 1 hour 0 minutes before start
Description:
LHC Lunch
Informal lunch with occasional talks
Host: Ennio Salvioni
Speaker: Ralph Edezhath (UC Davis)
Title: Dimension-6 Operator Constraints from Boosted VBF Higgs
Room: 432
Abstract: At energies below the heavy scale of new physics, it can be described in a model-independent way through an effective field theory composed of dimension-6 operators that preserve SM gauge symmetries. I will discuss the constraints on these operators from Higgs production through vector boson fusion, and compare it to the constraints from WW production. The sensitivity to these operators is significantly improved by examining VBF at high Higgs transverse momentum. Projected limits for both at the 14 TeV LHC will be presented.
User:
High-Energy Seminars
Time:
3:00am - 4:00am
Description:
Terning group meeting
Description:
Martin Luther King Day
User:
High-Energy Seminars
Time:
5:30am - 6:30am
Send Reminder:
Yes - 3 days 4 hour 0 minutes before start
Description:
Joint Theory Seminar
Speaker:
Title:
Host:
Room: 432
Abstract:
User:
High-Energy Seminars
Time:
8:00am - 9:00am
Send Reminder:
Yes - 0 days 4 hour 0 minutes before start
Description:
HE Seminar: Brajesh Choudhary
User:
High-Energy Seminars
Time:
3:00am - 4:00am
Description:
Terning group meeting
User:
High-Energy Seminars
Time:
8:10am - 9:10am
Send Reminder:
Yes - 0 days 4 hour 0 minutes before start
Description:
A THREE-DIMENSIONAL BRIDGE BETWEEN PHYSICS AND MATHEMATICS
Speaker: Tudor Dimofte, Institute for Advanced Study, Princeton
Location: 1147 MSB
Start time: Fri, Jan 23 2015, 4:10PM
I will discuss aspects of a "3d-3d correspondence" that assigns a three-dimensional supersymmetric gauge theory T[M] to any three-manifold M. The assignment is of a functorial nature, and has connected the study of 3d gauge theories to some beautiful mathematics, including "quantum" topological invariants of 3-manifolds, their categorification via a new analogue of Khovanov homology, the combinatorics of ideal triangulations (as first developed by Thurston and Neumann-Zagier), and the study of cluster algebras and their morphisms. In all these cases, the interplay between mathematics and physics has led to new insights, structure, and results.
Refreshments will be served in the room 20 minutes before the talk.
User:
High-Energy Seminars
Time:
6:30am - 7:30am
Send Reminder:
Yes - 3 days 4 hour 0 minutes before start
Description:
Joint Theory Seminar
Speaker:
Title:
Host:
Room: 432
Abstract:
User:
High-Energy Seminars
Time:
7:10am - 8:00am
Send Reminder:
Yes - 0 days 4 hour 0 minutes before start
Description:
Special Math/Phys Seminar: Abhijit Gadde (Institute for Advance Study, Princeton)
Location: 1147 MSB
Title: EXACT SOLUTIONS OF 2D SUPERSYMMETRIC GAUGE THEORIES
Abstract: We study dynamics of two-dimensional non-abelian gauge theories with N=(0,2) supersymmetry that include N=(0,2) supersymmetric QCD and its generalizations. For a range of parameters where supersymmetry is not dynamically broken at low energies, we give a complete description of the low-energy physics in terms of 2d N=(0,2) SCFTs using anomaly matching and modular invariance.
Refreshments will be served in the room 20 minutes before the talk.
User:
High-Energy Seminars
Time:
8:00am - 9:00am
Description:
HE Seminar
Speaker: Jenny Thomas, University College London
Title: CHIPS : CHerenkov detectors In mine PitS
Host: Svoboda
Room: 432
Abstract:An R&D project has started to develop an innovative approach for building very large water Cherenkov detectors in a neutrino beam. The longer-term goal is to construct a ~100 kT CHIPS detector to be deployed first in the NuMI and later in the LBNE beam, which will significantly extend the discovery potential for CP violation.
The latest measurement of the smallest of the mixing angles, theta_13, has presented the community with an embarrassment of riches. Physicists were preparing to measure a vanishingly small mixing angle, and therefore the design of new facilities and experiments was focused on providing exquisite background rejection. We now know that this mixing angle, and therefore the number of electron neutrino events which can be observed in a long baseline experiment, is large, meaning background rejection may not be the central challenge to the consequent study of CP violation. Instead, we need to collect larger data sets. We find ourselves with a clear set of fundamental quantities to measure, but lacking enough money to do it well. We are faced with a simple question: how do we make neutrino detectors cheaper?
The NuMI beam at FNAL is presently the most powerful neutrino beam in the world and will be ramping up to deliver 600 kW (6 x 10^20 p/year) over the coming 2 years. The NuMI beam is expected to run for the rest of the decade at least: the NOVA experiment will still be statistically limited by then and large improvements will continue to be made by running for longer. However, NOVA is off-axis and while this is perfect for studying the oscillation maximum, it does bring with it the downside of very low neutrino flux. Measurements of dcp require large statistics while the baseline is more forgiving compared to the measurement of mass hierarchy that calls for the longest baseline possible to maximize the matter effects. If more of the NuMI neutrinos could be measured in the coming decade, the knowledge base on which LBNE will build will be significantly improved.
An operational early-prototype was deployed this summer in the Wentworth 2W mine pit in Northern Minnesota, and I will discuss progress, lessons learned, plans and physics reach of the CHIPS series and describe the prognosis for physics on a short but realistic timescale.
User:
High-Energy Seminars
Time:
5:10am - 6:00am
Description:
Speaker: David Simmons-Duffin (Princeton IAS)
Title: Bootstrapping Conformal Field Theories
Room: Physics 432
Abstract: Conformal Field Theory (CFT) describes the long distance limit of numerous systems in particle and condensed matter physics. Often, the dynamics in this limit is strongly-coupled, making it hard to calculate observables precisely. However, in the last few years, a new technique for exploring CFTs has emerged based on the idea of the Conformal Bootstrap. I will explain how the Bootstrap lets us calculate critical exponents in the 3d Ising Model to world-record precision, how it explains similarities between magnets and boiling water, and how it can be applied to questions across theoretical physics.
Kwanzaa ends