Le contenu de cette page n’est pas disponible en français. Veuillez nous en excuser.

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.

 

Mardi déc 03, 2013
Speaker(s): 

I consider the effects of exotic production modes of the 125 GeV Higgs and their impact on Higgs searches and the Higgs discovery. I emphasize that new production modes have been largely overlooked in contemporary tests of the Standard Model nature of the Higgs boson but experimental tests of exotic production modes are viable now or will be soon. I present a couple explicit examples of exotic production arising from chargino-neutralino associated production in the MSSM.

Collection/Series: 
Scientific Areas: 

 

Lundi déc 02, 2013
Speaker(s): 

Gluinos are expected to be light for a natural electroweak scale, but the LHC has not seen them yet. Many possibilities have been proposed to hide natural gluinos in the LHC data, but are these methods really effective? In this talk, I will discuss the current status of kinematically accessible gluinos. By noting the most common features - MET, tops, and high multiplicity - which pervade natural gluino decays, I will argue that there are few places left to hide. I will briefly discuss the remaining weaknesses in LHC coverage and how to bolster them.

Collection/Series: 
Scientific Areas: 

 

Mardi nov 26, 2013
Speaker(s): 

Progress
in calculating S matrix elements have shown that
the malicious redundancies in non-linear

gauge
theories can be circumvented by utilizing unitarity methods in
conjunction

with BCFW recursion relations. When calculating in this fashion all
of the interaction vertices

beyond the three point function can be ignored. This simplification is
especially useful in gravity

Collection/Series: 
Scientific Areas: 

 

Mardi nov 19, 2013
Speaker(s): 

The effective number of neutrino species in our universe, Neff, is capable of probing the presence of new light or massless species in our universe. I will first review relevant facts about both CMB measurements of new light species and thermodynamics in the early universe.

Collection/Series: 
Scientific Areas: 

 

Mardi nov 12, 2013

We propose a robust, unified framework, in which the similar baryon and dark matter cosmic abundances both arise from the physics of weakly interacting massive particles (WIMPs), with the rough quantitative success of the so-called “WIMP miracle”. In particular the baryon asymmetry arises from the decay of a meta-stable WIMP after its thermal freezeout at or below the weak scale. A minimal model and its embedding in R-parity violating (RPV) natural SUSY are studied as examples. The new mechanism saves RPV SUSY from the potential crisis of washing out primordial baryon asymmetry.

Collection/Series: 
Scientific Areas: 

 

Mardi nov 05, 2013
Speaker(s): 

I'll discuss a class of supersymmetric models in
which the physical Higgs mass is freed from the quartic coupling, thereby
allowing for a 125 GeV Higgs state whose self-interaction can be much smaller
than in the SM via a mechanism of 'induced EWSB'. This class of models
provides a unique alternative to other realizations of natural SUSY, and the
simplest realizations necessitate additional characteristic scalars below the
TeV scale, thus altering phenomenological predictions for additional Higgses at
the LHC.

Collection/Series: 
Scientific Areas: 

 

Vendredi nov 01, 2013

TBA

Collection/Series: 
Scientific Areas: 

 

Mardi oct 29, 2013
Speaker(s): 

We will discuss the renormalization group flow
between different classes of CFTs in four dimensions and study possible lower
bounds on the "distances" between these theories.

Collection/Series: 
Scientific Areas: 

 

Vendredi oct 18, 2013
Speaker(s): 

Heavy
particle expansions, familiar from heavy quark physics, have found important
applications in the analysis of dark matter candidates and their interactions
with the Standard Model. From a different direction, precision
spectroscopy of muonic hydrogen has challenged QED and required more precise
knowledge of proton structure. These problems have forced a closer
examination of the construction of general heavy particle lagrangians at high
orders in the 1/M expansion, and in the absence of known ultraviolet

Collection/Series: 
Scientific Areas: 

 

Mardi oct 15, 2013
Speaker(s): 

Searches for physics beyond the standard model come in
many forms, from terrestrial probes to astroparticle experiments and
cosmological observations. Efforts to
combine multiple search channels in 'global fits' to new physics scenarios
typically consider only a subset of the available channels. Astroparticle searches in particular are
usually only included in a very approximate way, if at all. In this talk I will review recent progress in
including detailed gamma-ray, neutrino and CMB searches for dark matter in

Collection/Series: 
Scientific Areas: 

Pages