Particle Physics

Displaying 301 - 312 of 487

Cosmological Collider Physics

Nima Arkani-Hamed Institute for Advanced Study (IAS)
November 06, 2014

PIRSA:14110115
Particle Physics
Higgs Physics with the ATLAS experiment

Pierre Savard University of Toronto
October 31, 2014

PIRSA:14100120
Particle Physics
Discovering the QCD Axion with Black Holes and Gravitational Waves

Masha Baryakhtar University of Washington
October 28, 2014

PIRSA:14100049
Particle Physics
Fundamental physics with muons

October 21, 2014

PIRSA:14100115
(Non)perturbative QCD and Jet Substructure

Jesse Thaler Massachusetts Institute of Technology (MIT)

October 14, 2014

PIRSA:14100046
De Sitter Wavefunctionals and the Resummation of Time

Matthew Baumgart Carnegie Mellon University
October 07, 2014

PIRSA:14100051
Particle Physics
ADMX: The Axion Dark Matter Experiment

Gray Rybka University of Washington
September 30, 2014

PIRSA:14090067
Particle Physics
Scalar Simplified Models and Dark Matter at Colliders

Matthew Buckley Rutgers University
September 16, 2014

PIRSA:14090080
Particle Physics
Asymmetric Dark Matter Bound States

Mark Wise California Institute of Technology (Caltech)

September 02, 2014

PIRSA:14090068
Coloron-assisted Leptoquarks at the LHC

Joshua Berger Cornell University
August 29, 2014

PIRSA:14080042
Particle Physics
Testing QED with positronium state

Alexander Penin University of Alberta
August 26, 2014

PIRSA:14080038
Particle Physics
Asymmetric Hawking Radiation : Baryogenesis from Hawking Radiation

Anson Hook University of Maryland, College Park
July 29, 2014

PIRSA:14070019
Particle Physics

Cosmological Collider Physics

Nima Arkani-Hamed Institute for Advanced Study (IAS)
November 06, 2014

PIRSA:14110115
Particle Physics
Higgs Physics with the ATLAS experiment

Pierre Savard University of Toronto
October 31, 2014

PIRSA:14100120
Particle Physics
An overview of the latest Higgs physics results from the ATLAS collaboration will be presented. Next year, the Large Hadron collider will restart at a higher collision energy after a 2-year shutdown. The Higgs physics programme for this next data taking period will be discussed.
Discovering the QCD Axion with Black Holes and Gravitational Waves

Masha Baryakhtar University of Washington
October 28, 2014

PIRSA:14100049
Particle Physics
In the next few years, Advanced LIGO will be the first experiment to detect gravitational waves. Through superradiance of stellar black holes, it may also be the first experiment to discover the QCD axion with decay constant around or above the GUT scale. When an axion's Compton wavelength is comparable to the size of a black hole, the axion binds to the black hole, forming a "gravitational atom". Due to superradiance, the number of axions occupying the bound levels grows exponentially, extracting energy and angular momentum from the black hole. I will discuss the promising gravitational wave signals from axions transitioning between levels of the gravitational atom and axions annihilating to gravitons. Events for axions in the range 10^−13 to 10^−10 eV can be visible at aLIGO. The signals produced are long-lasting, monochromatic, and can be distinguished from ordinary astrophysical sources. These signatures are also promising for lighter axions at future, lower-frequency, GW observatories. I will also present our updated exclusion on the QCD axion mass range of 6*10^−13 eV < ma < 1.5*10^−11 eV imposed by black hole spin measurements.
Fundamental physics with muons

October 21, 2014

PIRSA:14100115

I will review applications of the muon as a probe for new phenomena. Topics to be discussed include the free muon decay and the determination of the Fermi constant; the anomalous magnetic moment of the muon; and searches for lepton flavor violation such as mu->e+gamma, mu->3e, and the muon-electron conversion, with special emphasis on the modification of the muon decay by the atomic binding.
(Non)perturbative QCD and Jet Substructure

Jesse Thaler Massachusetts Institute of Technology (MIT)

October 14, 2014

PIRSA:14100046

With the remarkable performance of the ATLAS and CMS detectors, jets at the LHC can now be characterized not just by their overall direction and energy but also by their substructure. At the same time, there has been substantial progress in predicting the properties of jets from first principles. In this talk, I highlight the ways that theoretical studies of jet substructure have enhanced our understanding of QCD, including examples that blur the boundary between perturbative and nonperturbative physics.
De Sitter Wavefunctionals and the Resummation of Time

Matthew Baumgart Carnegie Mellon University
October 07, 2014

PIRSA:14100051
Particle Physics
The holographic RG of Anti-De Sitter gives a powerful clue about the underlying AdS/CFT correspondence. The question is whether similar hints can be found for the heretofore elusive holographic dual of De Sitter. The framework of stochastic inflation uses nonperturbative insight to tame bad behavior in the perturbation series of a massless scalar in DS at late times. Remarkably, this fully quantum system loses phase information in the leading approximation, but retains a probabilistic character and allows for a controlled prediction of late time Green's functions. Recasting this as a "resummation of time", we wish understand whether the distributions that result can be thought of as an attractive UV fixed point of a theory
living on a spacelike slice of DS. We derive stochastic inflation via the wavefunctional approach to Quantum Field Theory. This allows for the straightforward implementation of corrections to the original framework.
ADMX: The Axion Dark Matter Experiment

Gray Rybka University of Washington
September 30, 2014

PIRSA:14090067
Particle Physics
Axions are an exceptionally well-motivated dark matter candidate in addition to being a consequence of the Peccei-Quinn solution to the strong CP problem. ADMX (Axion Dark Matter eXperiment) has recently been selected as the axion search for the US DOE Second-Generation Dark Matter Program. I will discuss the imminent upgrade of ADMX to a definitive search for micro-eV mass dark matter axions as well as the ongoing research and development of new technologies to expand the reach of ADMX to the entire plausible dark matter axion mass range.
Scalar Simplified Models and Dark Matter at Colliders

Matthew Buckley Rutgers University
September 16, 2014

PIRSA:14090080
Particle Physics
Dark matter is clear evidence of the existence of new physics beyond the Standard Model, and there are compelling reasons to expect that this physics can be probed at the LHC. As we prepare for Run II, we must consider a wide range of possible phenomenology, leaving no stone unturned. In this talk, I present a set of scalar and pseudoscalar models which provide a useful framework to interpret dark matter results, and can motivate new searches in novel channels at the LHC.
Asymmetric Dark Matter Bound States

Mark Wise California Institute of Technology (Caltech)

September 02, 2014

PIRSA:14090068

One of the simplest low energy effective theories with Asymmetric Dark Matter contains a gauge singlet Dirac Fermion for the dark matter and a gauge singlet scalar as the mediator that the dark matter decays into. In this model I discuss the spectrum of bound states (two body and multi-body) and the cosmological production/dissociation of dark matter two body bound states.
Coloron-assisted Leptoquarks at the LHC

Joshua Berger Cornell University
August 29, 2014

PIRSA:14080042
Particle Physics
Recent searches for a first-generation leptoquark by the CMS collaboration have shown around 2.5 sigma deviations from Standard Model predictions in both the eejj and e nu jj channels. Furthermore, the eejj invariant mass distribution has another 2.8 sigma excess from the CMS right-handed W plus heavy neutrino search. We point out that additional leptoquark production from a heavy coloron decay can provide a good explanation for all three excesses. The coloron has a mass around 2.1 TeV and the leptoquark mass can vary from 550 GeV to 650 GeV. A key prediction of this model is an edge in the total m_T distribution of e nu jj events at around 2.1 TeV.
Testing QED with positronium state

Alexander Penin University of Alberta
August 26, 2014

PIRSA:14080038
Particle Physics
The theory of quantum electrodynamics is recognized for the most accurate predictions in physics confirmed by experiment. I review the recent results on high precision tests of QED with an emphasize on the study of the positronium bound state.
Asymmetric Hawking Radiation : Baryogenesis from Hawking Radiation

Anson Hook University of Maryland, College Park
July 29, 2014

PIRSA:14070019
Particle Physics
We show that in the presence of a chemical potential, black hole evaporation generates baryon number. If the inflaton or Ricci scalar is derivatively coupled to the B-L current, the expansion of the universe acts as a chemical potential and splits the energy levels of particles and their anti-particles. The asymmetric Hawking radiation of primordial black holes can thus be used to generate a B-L asymmetry. If dark matter is produced by the same mechanism, the coincidence between the mass density of visible and dark matter can be naturally explained.

Title	Speaker(s)	Date	Talk Type	Info
Cosmological Collider Physics	Nima Arkani-Hamed	2014-11-06	Scientific Series	View details
Higgs Physics with the ATLAS experiment	Pierre Savard	2014-10-31	Scientific Series	View details
Discovering the QCD Axion with Black Holes and Gravitational Waves	Masha Baryakhtar	2014-10-28	Scientific Series	View details
Fundamental physics with muons		2014-10-21	Scientific Series	View details
(Non)perturbative QCD and Jet Substructure	Jesse Thaler	2014-10-14	Scientific Series	View details
De Sitter Wavefunctionals and the Resummation of Time	Matthew Baumgart	2014-10-07	Scientific Series	View details
ADMX: The Axion Dark Matter Experiment	Gray Rybka	2014-09-30	Scientific Series	View details
Scalar Simplified Models and Dark Matter at Colliders	Matthew Buckley	2014-09-16	Scientific Series	View details
Asymmetric Dark Matter Bound States	Mark Wise	2014-09-02	Scientific Series	View details
Coloron-assisted Leptoquarks at the LHC	Joshua Berger	2014-08-29	Scientific Series	View details
Testing QED with positronium state	Alexander Penin	2014-08-26	Scientific Series	View details
Asymmetric Hawking Radiation : Baryogenesis from Hawking Radiation	Anson Hook	2014-07-29	Scientific Series	View details

Particle Physics

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