# Particle Physics

This series consists of talks in the areas of Particle Physics, High Energy Physics & Quantum Field Theory.

## Seminar Series Events/Videos

Currently there are no upcoming talks in this series.

## Very Light Axigluons and the Top Asymmetry

Monday Dec 12, 2011
Speaker(s):

Both Tevatron experiments have recently reported an anomalous forward-backward asymmetry in top-antitop production. Their inclusive results are roughly 3 standard deviations larger than the standard model prediction and may be evidence of new physics that couples to the top quark. In this talk, I will present a weakly-coupled light axigluon model (

Collection/Series:
Scientific Areas:

## Supersymmetric QCD Corrections to b g → b h

Monday Dec 12, 2011
Speaker(s):

The dominant production mechanism for Standard Model (SM) Higgs boson is g g → h. However, in certain beyond the SM scenarios, Higgs production

Collection/Series:
Scientific Areas:

## On Black Holes in Massive Gravity

Friday Dec 09, 2011
Speaker(s):

In massive gravity the so-far-found black hole solutions on Minkowski space happen to convert horizons into a certain type of singularities. I will discuss whether these singularities can be avoided if space-time is not asymptotically Minkowskian.

Collection/Series:
Scientific Areas:

## R-Symmetry and Non-Perturbative QFT

Friday Dec 09, 2011
Speaker(s):

In this talk, I will discuss various aspects of UV-complete R-symmetric QFTs. In particular, I will focus on a small set of operators that are well-defined in many such theories, and I will argue that one can use these operators to get a (partial) non-perturbative handle on the deep IR physics, including, possibly, a handle on certain aspects of the emergent symmetries. Throughout, I will highlight applications to particle physics.

Collection/Series:
Scientific Areas:

## Decoupling the Gravity Multiplet from Supergravity

Thursday Dec 08, 2011
Speaker(s):

The full machinery of supergravity (SUGRA) is required to fully understand many supersymmetric models. For the purpose of understanding phenomenology at colliders and in cosmology, the main concern is to ascertain the effects of SUGRA on the vacuum structure and particle spectrum. Practical calculations often require cumbersome manipulations of component field terms involving the full gravity multiplet. In this talk I will present an alternative gauge fixing for conformal SUGRA which decouples these gravity complications from SUGRA computations.

Collection/Series:
Scientific Areas:

## A Systematic Approach to Rapidity Divergences

Thursday Dec 08, 2011
Speaker(s):

I will discuss how to construct a consistent effective field theory when the differing modes of the theory have the same invariant mass scale. I will sketch some phenomenological applications of the formalism relevant for the LHC.

Collection/Series:
Scientific Areas:

## Superconformally Covariant OPE and General Gauge Mediation

Wednesday Dec 07, 2011
Speaker(s):

After a short introduction to general gauge mediation, we use the operator product expansion (OPE) to explore the dynamics of the hidden sector of SUSY breaking, much like the OPE is used in e+e- scattering to hadrons in QCD. Along the way we derive consequences that the N=1 superconformal symmetry puts on three-point functions of two current superfields with an arbitrary superconformal primary operator. Using those constraints we construct a supermultiplet'' of OPEs.

Collection/Series:
Scientific Areas:

## Flavored Dark Matter: Direct Detection and Collider Signals

Wednesday Dec 07, 2011
Speaker(s):

I will present a class of models in which the dark matter particle carries flavor quantum numbers, and has renormalizable contact interactions with Standard Model fields. In particular, I will focus on models where the dark matter flavor is identified with lepton flavor in the Standard Model. The region of parameter space where the dark matter has the right abundance to be a thermal relic is accessible at current direct detection experiments.

Collection/Series:
Scientific Areas:

## Search for New Non-standard Decay Modes of SM-like Higgs at the LHC

Tuesday Dec 06, 2011
Speaker(s):

We present strategies of searching for supersymmetric non-standard decays of Standard Model (SM)-like Higgs bosons (h2) at the Large Hadron Collider (LHC), motivated by ''Dark Light Higgs'' (DLH) scenario. The DLH sccenario represents a limit of the nearly-Peccei-Quinn-symmetric Next-to-Minimal Supersymmetric Standard Model, where there naturally co-exist two light singlet-like particles: a scalar (h1), a pseudoscalar (a1), and a light singlino-like DM candidate (\chi_1), all with masses of order 10 GeV or below.

Collection/Series:
Scientific Areas:

## Channeling and Directional Features in Direct Dark Matter Detection

Tuesday Dec 06, 2011
Speaker(s):

The channeling of the ion recoiling after a collision with a WIMP produces a larger ionization/scintillation signal in direct dark matter detection experiments than otherwise expected. I will present estimates of the channeling fractions and their impact on data fits. I will also discuss the possibility of having a daily modulation of the signal due to channeling. Since this modulation depends on the recoil directions and thus on the orientation of the detector with respect to the galaxy, it would be a background free signature.

Collection/Series:
Scientific Areas:

## RECENT PUBLIC LECTURE

### Amber Straughn: A New Era in Astronomy: NASA’s James Webb Space Telescope

Speaker: Amber Straughn