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

TBA
mar 10 2015 - 1:00pm
Room #: 400
Speaker(s):
Scientific Areas:
TBA
mar 17 2015 - 1:00pm
Room #: 400
Speaker(s):
Scientific Areas:
TBA
mar 24 2015 - 1:00pm
Room #: 400
Speaker(s):
Scientific Areas:
TBA
mar 31 2015 - 1:00pm
Room #: 400
Scientific Areas:
TBA
avr 7 2015 - 1:00pm
Room #: 400
Speaker(s):
Scientific Areas:
TBA
avr 21 2015 - 1:00pm
Room #: 400
Speaker(s):
Scientific Areas:
TBA
avr 28 2015 - 1:00pm
Room #: 400
Speaker(s):
Scientific Areas:
TBA
mai 12 2015 - 1:00pm
Room #: 400
Speaker(s):
Scientific Areas:
TBA
mai 19 2015 - 1:00pm
Room #: 400
Speaker(s):
Scientific Areas:
mai 26 2015 - 1:00pm
Room #: 400
Scientific Areas:

 

Vendredi fév 27, 2015
Speaker(s): 

I will describe a new collider object we have termed emerging jets.

These can arise when there is a confining dark sector connected to the

Standard Model by a TeV scale mediator, a scenario that is well

motivated by dark matter considerations. The signature of an emerging

jet is O(10) displaced vertices inside the jet each with different

impact parameter, and a small number of prompt tracks. I will describe

strategies that can be used to discover emerging jets even if they

Collection/Series: 
Scientific Areas: 

 

Mardi fév 24, 2015
Speaker(s): 

We introduce and systematically study an expansive class of "orbifold Higgs" theories in which the weak scale is protected by accidental symmetries arising from the orbifold reduction of continuous symmetries. The protection mechanism eliminates quadratic sensitivity of the Higgs mass to higher scales at one loop (or more) and does not involve any new states charged under the Standard Model.

Collection/Series: 
Scientific Areas: 

 

Vendredi fév 20, 2015
Speaker(s): 

The Higgs boson was discovered at the LHC more than two years ago.

So far, the LHC data is consistent with the Standard Model (SM)

predictions. Given its increased rate in the next run of the LHC

with a center-of-mass energy of 14 TeV, double Higgs production will

become an important channel in the search for deviations from the SM

due to new heavy particles. The study of double Higgs production is

also important for understanding the structure of the scalar potential.

Collection/Series: 
Scientific Areas: 

 

Mardi fév 17, 2015
Speaker(s): 

The Higgs couplings to fermions are known parameters within the Standard Model. Deviations from these

expectations would be clear signals of new physics and are thus important target measurements for the LHC program.

In this talk I shall discuss ways to extra information about the coupling of the Higgs boson to the charm quark with

emphasis on methods applicable with the available LHC data set. A novel method based on the current ATLAS and CMS

Collection/Series: 
Scientific Areas: 

 

Mardi jan 20, 2015
Speaker(s): 

If dark matter is asymmetric, fermionic, and self-interacting, it may form black holes in pulsars at the galactic center. In this case, a measurable maximum attainable pulsar age would track the density of the dark matter halo, with the oldest pulsars being allowed in the least dense parts of the halo. This could explain a recent observation, that there are not as many pulsars in the galactic center as expected.

Collection/Series: 
Scientific Areas: 

 

Mardi déc 09, 2014
Speaker(s): 

The cosmological model based on cold dark matter (CDM) and dark energy has been hugely successful in describing the observed evolution and large scale structure of our Universe. However, at small scales (in the smallest galaxies and at the centers of larger galaxies), a number of observations seem to conflict with the predictions CDM cosmology, leading to recent interest in Warm Dark Matter (WDM) and Self-Interacting Dark Matter (SIDM) models. These small scales, though, are also regions dominated by the influence of baryons.

Collection/Series: 

 

Mercredi déc 03, 2014
Speaker(s): 

In the search for dark matter, neutrino experiments can play a key role by doubling as dark matter production and detection experiments. I will describe how the proposed DAEdALUS decay-at-rest neutrino experiment can be used to search for MeV-scale dark matter, with particular emphasis on dark matter produced through a dark photon in rare neutral pion decays. The fact that the dark photon need not be on-shell opens up a wide range of new possibilities for the experimental program of searching for dark matter at neutrino experiments.

Collection/Series: 

 

Mardi déc 02, 2014
Speaker(s): 

Recent comparison between observation and expectation could point to problems with the standard cold, non-interacting dark matter picture, one of which being how small the smallest gravitationally bound dark matter halos are. I will review the cold dark matter picture and the experimental tests. One solution to the problems comes from coupling the dark matter to neutrinos. I will describe the model building requirements of such a coupling and determine how to test this scenario.

Collection/Series: 

 

Vendredi nov 28, 2014
Speaker(s): 

Moduli fields with Planck suppressed couplings to light species are ubiquitous in string theory and supersymmetry. These scalar fields are expected to dominate the energy budget in the early universe. Their out-of-equilibrium decays can produce dark matter and baryons. Dark matter generated in this non-thermal manner typically has large annihilation rates that are strongly constrained by indirect detection. The resulting bounds on superpartner masses offer dim prospects for collider discovery of supersymmetry.

Collection/Series: 
Scientific Areas: 

 

Mardi nov 25, 2014
Speaker(s): 

A new experiment called PTOLEMY (Princeton Tritium Observatory for Light, Early-Universe, Massive-Neutrino Yield) is under development at the Princeton Plasma Physics Laboratory with the goal of challenging one of the most fundamental predictions of the Big Bang – the present-day existence of relic neutrinos produced less than one second after the Big Bang.

Collection/Series: 
Scientific Areas: 

Pages