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Search results in High Energy Physics from PIRSA

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Towards a 1/c Expansion in 2d Conformal Field Theory
February 04, 2014

PIRSA:14020084
High Energy Physics
Mayer-Cluster Expansion of Instanton Partition Functions and Thermodynamic Bethe Ansatz

Carlo Meneghelli University of Oxford
January 28, 2014

PIRSA:14010096
High Energy Physics
Boundaries and Defects in 4d N=4 SYM

Masahito Yamazaki University of Tokyo
January 21, 2014

PIRSA:14010086
High Energy Physics
Gaugino physics of split supersymmetry spectrum at the LHC and future proton colliders

Sunghoon Jung Korea Institute for Advanced Study
January 16, 2014

PIRSA:14010103
High Energy Physics
Beyond the Standard Paradigm

Paul Langacker Institute for Advanced Study (IAS)
January 15, 2014

PIRSA:13010116
High Energy Physics
(0,4) sigma models and K3

Sarah Harrison Stanford University
December 18, 2013

PIRSA:13120071
High Energy Physics
Integrability (and Near Integrability) in Matrix-valued Field Theories

Axel Cortes Cubero City University of New York
December 13, 2013

PIRSA:13120068
High Energy Physics
(0,2) Trialities

Abhijit Gadde Stony Brook University
December 10, 2013

PIRSA:13120062
High Energy Physics
No GUTs, All Glory: Charge Quantization and the Standard Model from Nonlinear Sigma Models

John Kehayias University of Tokyo
December 06, 2013

PIRSA:13120056
High Energy Physics
BBN and the Unnatural Weak Scale

David Pinner University of California, Berkeley
December 05, 2013

PIRSA:13120058
High Energy Physics
Using the Higgs as a Direct Probe of New Physics

Michael Park Rutgers University
December 05, 2013

PIRSA:13120050
High Energy Physics
Jets Without Jets

Daniele Bertolini Massachusetts Institute of Technology (MIT)
December 04, 2013

PIRSA:13120052
High Energy Physics

Towards a 1/c Expansion in 2d Conformal Field Theory
February 04, 2014

PIRSA:14020084
High Energy Physics
I will describe progress in deriving 3d gravity directly from 2d conformal field theory at large central charge 'c'. In a large class of CFTs, using general arguments like modular invariance, crossing symmetry, and the OPE expansion, the spectrum, the entanglement entropy, and certain partition functions can be computed to leading order in a 1/c expansion. The results agree with universal features of 3d gravity required by black hole thermodynamics and the Ryu-Takayanagi formula; furthermore, the relevant 3d geometries appear automatically from CFT calculations in this regime.
Mayer-Cluster Expansion of Instanton Partition Functions and Thermodynamic Bethe Ansatz

Carlo Meneghelli University of Oxford
January 28, 2014

PIRSA:14010096
High Energy Physics
In arXiv:0908.4052, Nekrasov and Shatashvili pointed out that the N=2 instanton partition function in a special limit of the Omega-deformation parameters is characterized by certain thermodynamic Bethe ansatz (TBA) like equations.In this talk I will present an explicit derivation of this fact as well as generalizations to quiver gauge theories. The TBA equations derived entirely within gauge theory have been proposed to encode the spectrum of a large class of quantum integrable systems. I will conclude with some remarks on this correspondence.
Boundaries and Defects in 4d N=4 SYM

Masahito Yamazaki University of Tokyo
January 21, 2014

PIRSA:14010086
High Energy Physics
We discuss boundary conditions and domain walls in 4d N=4 SYM, focusing on those preserving 4 supercharges. Along the way we revisit the old problem of the quantum-corrected moduli space of 3d N=2 theories.
Gaugino physics of split supersymmetry spectrum at the LHC and future proton colliders

Sunghoon Jung Korea Institute for Advanced Study
January 16, 2014

PIRSA:14010103
High Energy Physics
Discovery of the Higgs boson and lack of discovery of superpartners in the first run at LHC are both predictions of split supersymmetry with thermal dark matter. We discuss what it would take to find gluinos at hadron supercolliders, including the LHC at 14 TeV center of mass energy, and future pp colliders at 100 TeV and 200 TeV. We generalize the discussion by re-expressing the search capacity in terms of gluino to lightest superpartner mass ratio, and apply results to other scenarios, such as gauge mediation and mirage mediation. In those models, distinctive gaugino mass ratios arise at leading order, but can be significantly modified by large logarithmic quantum corrections from split spectrum.
Beyond the Standard Paradigm

Paul Langacker Institute for Advanced Study (IAS)
January 15, 2014

PIRSA:13010116
High Energy Physics
I reexamine the current situation in particle and neutrino physics from a top-down perspective, discussing such underlying issues as uniqueness versus environment, minimality versus remnants, and naturalness versus tuning.
(0,4) sigma models and K3

Sarah Harrison Stanford University
December 18, 2013

PIRSA:13120071
High Energy Physics
TBA
Integrability (and Near Integrability) in Matrix-valued Field Theories

Axel Cortes Cubero City University of New York
December 13, 2013

PIRSA:13120068
High Energy Physics
The principal chiral sigma model (PCSM) in 1+1 dimensions is asymptotically free and has as SU(N)-valued field with massive excitations. We have found all the exact form factors and two-point function of the Noether-current operators at large N using the integrable bootstrap program. At finite N, only the first non-trivial form factors are found, which give a good long distance approximation for the two-point function. We show how to use these new exact results to study non-integrable deformations. One example is the PCSM coupled to a Yang-Mills field. One can approximate the spectrum of the meson-like bound states using our form factors. We also examine an anisotropic version of (2+1)-dimensional Yang-Mills theory, which can be interpreted as an array of coupled PCSM’s.
(0,2) Trialities

Abhijit Gadde Stony Brook University
December 10, 2013

PIRSA:13120062
High Energy Physics
Motivated by the connection between 4-manifolds and 2d N=(0,2) theories, we study the dynamics of a fairly large class of 2d N=(0,2) gauge theories. We see that physics of such theories is very rich, much as the physics of 4d N=1 theories. We discover a new type of duality that is very reminiscent of the 4d Seiberg duality. Surprisingly, the new 2d duality is an operation of order three. We study the low energy physics and use elliptic genus to detect dynamical supersymmetry breaking.
No GUTs, All Glory: Charge Quantization and the Standard Model from Nonlinear Sigma Models

John Kehayias University of Tokyo
December 06, 2013

PIRSA:13120056
High Energy Physics
I will present recent and ongoing work in collaboration with Tsutomu Yanagida and Simeon Hellerman (arXiv:1309.0692 and 1312.xxxx) on a new way to obtain charge quantization, without a GUT or monopole solution. In the CP^1 model, SU(2)_G/U(1)_H, consistency conditions for a charged field and its transformation properties over the entire group manifold lead to a charge quantization condition. By gauging the U(1)_H and identifying it with hypercharge, we find charge quantization in the SM without a monopole or GUT, purely from the structure and dynamics of the nonlinear sigma model. This is easily extended to CP^2 and general CP^k models. Phenomenologically, the CP^1 model has a fractionally charged stable Nambu-Goldstone boson (NGB), which has intriguing applications to nuclear physics and dark matter. The CP^2 model has the Higgs as the NGB. With some additional minor assumptions, anomaly freedom then leads to the matter content of a generation in the SM.
BBN and the Unnatural Weak Scale

David Pinner University of California, Berkeley
December 05, 2013

PIRSA:13120058
High Energy Physics
The discovery of a perturbatively-coupled, 125 GeV Higgs, together with the absence of LHC signals for supersymmetry, places the principle of naturalness under tension. In this talk I will discuss the possibility that the weak scale is unnatural, with its value determined environmentally in the landscape. In particular, this environmental selection may be driven by BBN: as the weak scale is increased, the abundance of Hydrogen in the early universe is rapidly depleted. That our own universe contains an O(1) fraction of primordial Helium arises as a conspiracy among the weak scale, the neutron-proton mass difference, and the planck scale.
Using the Higgs as a Direct Probe of New Physics

Michael Park Rutgers University
December 05, 2013

PIRSA:13120050
High Energy Physics
The discovery of the Higgs boson marks the first direct probe into the mechanism of electroweak symmetry breaking. All evidence currently points to the fact that electroweak symmetry is broken by at least one fundamental scalar, and naturalness remains the most compelling reason to expect additional degrees of freedom at the weak scale. This talk will describe some ideas for how to utilize powerful and proven experimental techniques, in conjunction with the fact that observables directly related to the Higgs boson are now experimentally accessible, to make concrete statements about the existence of possible new degrees of freedom at the weak scale.
Jets Without Jets

Daniele Bertolini Massachusetts Institute of Technology (MIT)
December 04, 2013

PIRSA:13120052
High Energy Physics
Jets are key tools for physics at the LHC. Usually, jets are identified through a jet algorithm. In this talk, I will present an alternative way of thinking about jets, by showing how a broad class of inclusive jet-based observables can be replaced by event shapes. These event shapes do not require any jet clustering, but they still implement a jet-like pT cut on "jets" with an R-like radius. I will discuss various applications, including event selection at trigger-level, event-wide trimming, and alternative definitions for boosted objects identifiers.

Title	Date	Collection	Type	Info
Towards a 1/c Expansion in 2d Conformal Field Theory	2014‑02‑04	Quantum Fields and Strings	Scientific Series	View details
Mayer-Cluster Expansion of Instanton Partition Functions and Thermodynamic Bethe Ansatz	2014‑01‑28	Quantum Fields and Strings	Scientific Series	View details
Boundaries and Defects in 4d N=4 SYM	2014‑01‑21	Quantum Fields and Strings	Scientific Series	View details
Gaugino physics of split supersymmetry spectrum at the LHC and future proton colliders	2014‑01‑16	Particle Physics	Scientific Series	View details
Beyond the Standard Paradigm	2014‑01‑15	Colloquium	Scientific Series	View details
(0,4) sigma models and K3	2013‑12‑18	Quantum Fields and Strings	Scientific Series	View details
Integrability (and Near Integrability) in Matrix-valued Field Theories	2013‑12‑13	Quantum Fields and Strings	Scientific Series	View details
(0,2) Trialities	2013‑12‑10	Quantum Fields and Strings	Scientific Series	View details
No GUTs, All Glory: Charge Quantization and the Standard Model from Nonlinear Sigma Models	2013‑12‑06	Particle Physics	Scientific Series	View details
BBN and the Unnatural Weak Scale	2013‑12‑05	Particle Physics	Scientific Series	View details
Using the Higgs as a Direct Probe of New Physics	2013‑12‑05	Particle Physics	Scientific Series	View details
Jets Without Jets	2013‑12‑04	Particle Physics	Scientific Series	View details

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Format results

Towards a 1/c Expansion in 2d Conformal Field Theory

Mayer-Cluster Expansion of Instanton Partition Functions and Thermodynamic Bethe Ansatz

Boundaries and Defects in 4d N=4 SYM

Gaugino physics of split supersymmetry spectrum at the LHC and future proton colliders

Beyond the Standard Paradigm

(0,4) sigma models and K3

Integrability (and Near Integrability) in Matrix-valued Field Theories

(0,2) Trialities

No GUTs, All Glory: Charge Quantization and the Standard Model from Nonlinear Sigma Models

BBN and the Unnatural Weak Scale

Using the Higgs as a Direct Probe of New Physics

Jets Without Jets

Towards a 1/c Expansion in 2d Conformal Field Theory

Mayer-Cluster Expansion of Instanton Partition Functions and Thermodynamic Bethe Ansatz

Boundaries and Defects in 4d N=4 SYM

Gaugino physics of split supersymmetry spectrum at the LHC and future proton colliders

Beyond the Standard Paradigm

(0,4) sigma models and K3

Integrability (and Near Integrability) in Matrix-valued Field Theories

(0,2) Trialities

No GUTs, All Glory: Charge Quantization and the Standard Model from Nonlinear Sigma Models

BBN and the Unnatural Weak Scale

Using the Higgs as a Direct Probe of New Physics

Jets Without Jets