LHC Lunch
Speaker: Liam Fitzpatrick (Boston University)
Title: Effective Conformal Theory and the Flat-Space Limit of AdS
Room: 432 PHY
Duration: 60 minutes
User:
High-Energy Seminars
Time:
5:30am - 6:30am
Send Reminder:
Yes - 0 days 4 hour 0 minutes before start
Description:
Joint Theory Seminar
Speaker: Jared Kaplan
Title: Predictions from a Tevatron Anomaly
Host: Markus Luty
Room: 432
We examine the implications of the recent CDF measurement of the top-quark forward-backward asymmetry, focusing on a scenario with a new color octet vector boson at 1-3 TeV. We study several models, as well as a general effective field theory, and determine the parameter space which provides the best simultaneous fit to the CDF asymmetry, the Tevatron top pair production cross section, and the exclusion regions from LHC dijet resonance and contact interaction searches. Flavor constraints on these models are more subtle and less severe than the literature indicates. We find a large region of allowed parameter space at high axigluon mass and a smaller region at low mass; we match the latter to an SU(3)xSU(3)/SU(3) coset model with a heavy vector-like fermion. Our scenario produces discoverable effects at the LHC with only 1-2 inverse femtobarns of luminosity at 7-8 TeV. Lastly, we point out that a Tevatron measurement of the b-quark forward-backward asymmetry would be very helpful in characterizing the physics underlying the top-quark asymmetry.
User:
High-Energy Seminars
Time:
8:10am - 9:40am
Description:
Speaker: Dr. Corrinne Mills: (Harvard)
Title: W Physics at ATLAS
Abstract: <a href="http://www.physics.ucdavis.edu/Abstracts/2011-03-08_Mills.pdf">Abstract</a>
User:
High-Energy Seminars
Time:
4:10am - 5:10am
Send Reminder:
Yes - 1 day 4 hour 0 minutes before start
Description:
LHC Lunch
Speaker: John Conway, Max Chertok
Title: New Physics Searches in taus and trileptons at CMS
Room: 432 PHY
Duration: 60 minutes
User:
High-Energy Seminars
Time:
6:30am - 7:30am
Send Reminder:
Yes - 0 days 4 hour 0 minutes before start
Description:
Joint Theory Seminar
Speaker:
Title:
Host:
Room: 432
User:
High-Energy Seminars
Time:
9:10am - 10:10am
Send Reminder:
Yes - 1 day 8 hour 0 minutes before start
Description:
HE Seminar
Speaker: Michael Mulhearn
Title:Symmetry and the Search for New Particles
Abstract:Broken symmetries provide clues for discoveries. More than one hundred years ago, electric and magnetic forces were unified into one electromagnetic interaction with a broken symmetry: there is only electric charge, but no magnetic charge. This is a clue that there might be new fundamental particles with magnetic charge waiting to be discovered. More recently, the unification of electromagnetism with the nuclear weak force into one electroweak interaction revealed yet another broken symmetry: the electromagnetic boson (photon) is massless, while the weak boson (W and Z) are massive. One explanation for this broken symmetry introduces a new fundamental particle, the Higgs boson, which has not been discovered. We will explore how the Fermilab Tevatron collider is used as a tool to hunt for new fundamental particles, by examining recent searches for a magnetic monopole and the Higgs boson.
Host:
Room: 416
User:
High-Energy Seminars
Time:
5:10am - 6:10am
Send Reminder:
Yes - 1 day 4 hour 0 minutes before start
Description:
LHC Lunch
Speaker: Josh Ruderman (Princeton)
Title: Asymmetric Dark Matter from Leptogenesis
Host: Chang
Room: 432 PHY
Duration: 60 minutes
User:
High-Energy Seminars
Time:
7:00am - 8:30am
Description:
Speaker: Toyoko Orimoto
Title: Diphotons with the CMS Detector: Early Searches with 7 TeV LHC Data
Abstract:The Compact Muon Solenoid (CMS) Experiment is a general purpose particle detector experiment at the Large Hadron Collider (LHC) at CERN. The CMS detector is instrumented with a high precision, high granularity electromagnetic crystal calorimeter, which will allow for a wide range of physics studies with photons. Such studies include the search for the Higgs boson in the diphoton decay channel, as well as the quest for new physics beyond the Standard Model, such as extra dimensions. I will describe a few early CMS physics searches with di-photons with 7 TeV LHC data, also highlighting the strengths of the CMS electromagnetic calorimeter and the use of photons as an important diagnostic and calibration tool in the LHC start-up phase.
Room 432
User:
High-Energy Seminars
Time:
6:30am - 7:30am
Send Reminder:
Yes - 0 days 4 hour 0 minutes before start
Description:
Joint Theory Seminar
Speaker: David Poland
Title: Bounds on 4D Conformal and Superconformal Field Theories
Host: Luty
Room: 432
Near-conformal dynamics may play an important role in beyond the standard model physics, but many scenarios rely crucially on assumptions about the behavior of strongly-coupled field theories that are difficult to check. I will present recent work aimed at getting a better understanding the range of behavior that is possible in 4D conformal field theories. In particular, I will discuss how unitarity combined with crossing symmetry of four-point functions leads to general bounds on operator dimensions, central charges, and OPE coefficients in both supersymmetric and non-supersymmetric CFTs.
User:
High-Energy Seminars
Time:
9:10am - 10:10am
Send Reminder:
Yes - 1 day 8 hour 0 minutes before start
Description:
HE Seminar
Speaker:
Title:
Host:
Room: 416
Abstract:
Many beyond the standard model scenarios predict that the LHC will produce new heavy particles with decay channels involving top quarks, W/Z bosons, and Higgs bosons. If these top quarks and electroweak bosons are sufficiently boosted, then their decays can be misreconstructed as a single fat jet. In this talk, I describe a new jet shape, N-subjettiness, designed to tag boosted hadronically-decaying objects and reject the background of QCD jets with large invariant mass. I will argue that N-subjettiness combines the advantages of jet shapes with the discriminating power seen in previous jet substructure algorithms. I will also suggest that techniques learned from N-subjettiness may be applicable to entire events, pointing toward new algorithms for jet reconstruction.
User:
High-Energy Seminars
Time:
6:30am - 7:30am
Send Reminder:
Yes - 0 days 4 hour 0 minutes before start
Description:
Joint Theory Seminar
User:
High-Energy Seminars
Time:
9:10am - 10:10am
Send Reminder:
Yes - 1 day 1 hour 0 minutes before start
Description:
HE Seminar
Speaker: John Mason (Harvard)
Title: Higgs Decays to Neutralinos in Gauge Mediation
Host: Spencer Chang
Room: 416
8:10am» HE Seminar