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

Speaker(s):
Scientific Areas:
TBA
oct 30 2018 - 1:00pm
Room #: 394
Speaker(s):
Scientific Areas:
TBA
nov 2 2018 - 1:00pm
Room #: 394
Speaker(s):
Scientific Areas:
TBA
nov 13 2018 - 1:00pm
Room #: 394
Speaker(s):
Scientific Areas:
TBA
nov 16 2018 - 1:00pm
Room #: 394
Speaker(s):
Scientific Areas:
TBA
nov 20 2018 - 1:00pm
Room #: 394
Speaker(s):
Scientific Areas:
TBA
nov 27 2018 - 1:00pm
Room #: 394
Speaker(s):
Scientific Areas:
TBA
déc 4 2018 - 1:00pm
Room #: 394
Speaker(s):
Scientific Areas:
 

 

Mardi oct 09, 2018
Speaker(s): 

After the detection of black hole and neutron star binary mergers at LIGO/Virgo, gravitational wave becomes a new observational channel that we didn't have access to years ago.

It is an interesting question to ask what kind of new particle physics this channel can probe.

To answer this question, one needs to fill the gap between the scales of the astrophysical processes and the fundamental structures.

Collection/Series: 
Scientific Areas: 
 

 

Vendredi oct 05, 2018
Speaker(s): 

Recent progress in determining scattering phase shifts, and hence, resonance properties from lattice QCD in finite volumes is presented.

The relationship between finite-volume stationary-state energies and the two-particle scattering K-matrix is discussed.

Details of the Monte Carlo computations of the finite-volume two-particle energies are described.

Results for pion-pion, kaon-pion, and nucleon-pion scattering are presented.

Collection/Series: 
Scientific Areas: 
 

 

Mardi oct 02, 2018
Speaker(s): 

Most current dark matter detection strategies, including both direct and indirect efforts, are based on the assumption that the galactic dark matter number density is quite high, allowing for the detection of rare scattering events. Such a paradigm arises naturally if the dark matter self-interactions are weak. However, strong interactions within the dark sector can give rise to large composite objects, whose detection requires a different experimental paradigm. We call these object Dark Blobs.

Collection/Series: 
Scientific Areas: 
 

 

Mardi aoû 14, 2018

We present a new solution to the Hierarchy Problem utilizing non-linearly realized discrete symmetries. The cancelations occur due to a discrete symmetry that is realized as a shift symmetry on the scalar and as an exchange symmetry on the particles with which the scalar interacts. We show how this mechanism can be used to solve the Little Hierarchy Problem as well as give rise to light axions.

Collection/Series: 
Scientific Areas: 
 

 

Jeudi juin 07, 2018
Speaker(s): 

The power spectrum for fluctuations in the number density of galaxies can be very different in shape from the power spectrum for fluctuations in the mass density at very small wave vectors (i.e., large length scales) if the primordial density fluctuations are non-Gaussian. I review this phenomena. (It  is fairly well known in the more astrophysical part of the cosmology community but less so in the particle physics part of the field.) Then I show that primordial non-Gaussianities that arise from quantum loop diagrams in de-Sitter space can give rise to this phenomena.

Collection/Series: 
Scientific Areas: 
 

 

Mardi juin 05, 2018
Speaker(s): 

We present fundamental limits of axion and hidden-photon dark matter searches probing the electromagnetic coupling. These limits are informed by constraints on noise in phase-insensitive amplifiers, as well as constraints on impedance matching. We motivate the use of quantum-limited amplifiers for dark matter searches, in particular at low masses/frequencies, where they provide a substantial enhancement due to sensitivity outside of the detector bandwidth. We discuss the role of priors, e.g.

Collection/Series: 
Scientific Areas: 
 

 

Mardi mai 29, 2018
Speaker(s): 
Collection/Series: 
Scientific Areas: 

 

Mardi mai 08, 2018

Ultralight bosons exist in various proposed extensions to the Standard Model, which can form condensates around rapidly rotating black holes through a process called superradiance. These boson clouds have many interesting observational consequences, such as the continuous emission of monochromatic gravitational waves.

Collection/Series: 
Scientific Areas: 
 

 

Mardi mai 01, 2018
Speaker(s): 

Microwave Kinetic Inductance Detectors, or MKIDs, are superconducting detector arrays that can measure the energy and arrival time of individual optical through near-IR photons without read noise or dark counts.  I will discuss our recent work and results from the first two MKID Integral Field Spectrographs (IFSs) for high contrast imaging, DARKNESS/SDC at the P

Collection/Series: 
Scientific Areas: 
 

 

Vendredi avr 27, 2018
Speaker(s): 

I show that dark matter abundance can be set by the decoupling of inelastic scatterings instead of annihilations. Coscattering points to dark matter that is exponentially lighter than the weak scale and has a suppressed annihilation rate, avoiding constraints from indirect detection. The late decays of the states into which dark matter upscatters, can lead to observable distortions to the blackbody spectrum of the cosmic microwave background. 

Collection/Series: 
Scientific Areas: 

Pages