Joint Theory Seminar
Speaker:Simon Knapen
Title: A COmpact DEtector for eXotics at LHCb
Host:Verhaaren
Room: 432
Abstract:I will discuss CODEX-b, a proposal for a new LHCb sub-detector for long-lived particles and will show how this detector would have complementary reach compared to ATLAS, CMS and LHCb.
Joint Theory Seminar
Speaker: Brian Henning (Yale)
Title: Decomposing strongly coupled states: conformal bases and Hamiltonian truncation
Host: Xiaochuan Lu
Room: 432
Abstract: Wouldn't it be lovely if we could use the same variational approaches familiar from quantum mechanics to study quantum field theories? We can, of course; the real question is how do we do this efficiently? In this talk I will discuss the recent revival of approximate Hamiltonian diagonalization as a means to numerically study field theories, both of the strong and weak variety, and of Euclidean and Lorentzian signature. Underlying present successes compared to similar attempts last century is a judicious choice of a basis for the unperturbed Hilbert space. One such basis, that has demonstrated promise, is organized according to the conformal symmetry of the UV fixed point.
Motivated by developing ingredients necessary to implement Hamiltonian truncation, we present a new method—using spinors in momentum space—to explicitly construct conformal representations in d=2, 3, and 4 dimensions. This turns out to be interesting in its own right; for example, intriguing structures emerge, notably a U(N) action which generalizes the N-particle U(1)^N action of the little group is found to completely characterize primary operators.
Nuclear Seminar Series
Speaker: Szymon Manecki, Queens University
Title: The SNO+ Neutrinoless Double Beta Decay Experiment
Host: Svoboda
Room: 185
User:
High-Energy Seminars
Time:
6:30am - 7:30am
Send Reminder:
Yes - 1 day 4 hour 0 minutes before start
Description:
Joint Theory Seminar
Speaker: Tim Cohen (U of Oregon)
Title: Two for the Price of One: The Hyperbolic Higgs / What is the Machine Learning?
Host: Terning
Room: 432
Abstract: I will present two (completely unrelated) half hour seminars. "The Hyperbolic Higgs" is a model of neutral naturalness with Standard Model neutral gauge top parters. I will present the underlying mechanism in general terms followed by a description of a complete model. "What is the Machine Learning?" frames the question posed by the title in terms of a new method -- data planing -- for uncovering what features of a data set are being utilized by a machine learning algorithm (in this case neural networks) to discriminate signal from background. I will explain how this procedure works and will demonstrate its efficacy for an LHC signature that emerges when simply extending the Standard Model with a new heavy gauge boson.
<p>Joint Theory Seminar Speaker: mail: Title: Host: Room: 432 Abstract:</p>
User:
High-Energy Seminars
Time:
9:10am - 10:10am
Send Reminder:
Yes - 1 day 4 hour 0 minutes before start
Description:
High Energy Seminar
Speaker: Albert de Roeck
Title: Searches for Long Lived Particles at the Large Hadron Collider
Host: Robin Erbacher
Room: 285
Abstract: The Large Hadron Collider (LHC) is the highest energy particle collider operational in the world. One of its main scientific goals is the quest for signals beyond the Standard Model of particle physics. In this seminar, we will discuss a special kind of searches conducted recently at several of the LHC experiments: the search for long lived particles. Particles such as heavy neutral scalars, long-lived supersymmetric particles, monopoles etc., do not decay at the interaction vertex, but will traverse the detectors and can produce detectable signals in the detector volume. We will review the recent results and what we can learn from these searches for physics beyond the Standard Model. We will also discuss emerging opportunties at the LHC for new "small-scale" experiments that can cover in the near future additional searches for such new exotic particles, in a complementary way to the capabilites of the present LHC detectors.
User:
High-Energy Seminars
Time:
6:30am - 7:30am
Send Reminder:
Yes - 1 day 4 hour 0 minutes before start
Description:
Joint Theory Seminar
Speaker: Zackaria Chacko (UMD)
Title: Cosmological Signatures of a Mirror Twin Higgs
Host: Verhaaaren
Room: 432
Abstract:I explore the cosmological signatures associated with the twin baryons, electrons, photons and neutrinos in the Mirror Twin Higgs framework. I consider a scenario in which the twin baryons constitute a subcomponent of dark matter, and the contribution of the twin photon and neutrinos to dark radiation is suppressed due to late time asymmetric reheating, but remains large enough to be detected in future cosmic microwave background (CMB) experiments. I show that this framework leads to distinctive signals in large and small scale structure and the CMB that may allow it to be discovered, and distinguished from other dark sectors.
April Fool's Day