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# 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.

## Goldstone Fermion Dark Matter

Vendredi jan 06, 2012
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We propose that the fermionic superpartner of a weak-scale Goldstone boson can be a nat- ural WIMP candidate. The p-wave annihilation of this Goldstone fermion' into pairs of Gold- stone bosons automatically generates the correct relic abundance, whereas the XENON100 direct detection bounds are evaded due to suppressed couplings to the Standard Model. Further, it is able to avoid indirect detection constraints because the relevant s-wave annihi- lations are small.

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## Warm Baryogenesis

Mardi déc 13, 2011
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We show that a baryon asymmetry can be generated by dissipative effects during warm inflation via a supersymmetric two-stage mechanism, where the inflaton is coupled to heavy mediator fields that then decay into light species through B- and CP-violating interactions. In contrast with thermal GUT baryogenesis models, the temperature during inflation is always below the heavy mass threshold, simultaneously suppressing thermal and quantum corrections to the inflaton potential and the production of dangerous GUT relics.

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## Little Warped Spaces and the Radion

Mardi déc 13, 2011
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A little warped space is a truncated slice of AdS5 with a warped metric as per Randall-Sundrum, and energy scales much less than the 4D Planck mass.

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## Very Light Axigluons and the Top Asymmetry

Lundi déc 12, 2011
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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 (

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## Supersymmetric QCD Corrections to b g → b h

Lundi déc 12, 2011
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The dominant production mechanism for Standard Model (SM) Higgs boson is g g → h. However, in certain beyond the SM scenarios, Higgs production

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## On Black Holes in Massive Gravity

Vendredi déc 09, 2011
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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.

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## R-Symmetry and Non-Perturbative QFT

Vendredi déc 09, 2011
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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.

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## Decoupling the Gravity Multiplet from Supergravity

Jeudi déc 08, 2011
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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.

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## A Systematic Approach to Rapidity Divergences

Jeudi déc 08, 2011
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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.

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## Superconformally Covariant OPE and General Gauge Mediation

Mercredi déc 07, 2011
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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.

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