High Energy Physics

Displaying 1789 - 1800 of 3116

Evidence for a new particle on the worldsheet of the QCD flux tube

Sergei Dubovsky New York University (NYU)
March 19, 2013

PIRSA:13030109
High Energy Physics
Learning what the Higgs is mixed with

Kunal Kumar Carleton University
March 19, 2013

PIRSA:13030089
High Energy Physics
12/13 PSI - Explorations in Particle Theory Lecture 2

David Morrissey TRIUMF
March 19, 2013

PIRSA:13030066
High Energy Physics
12/13 PSI - Explorations in Particle Theory Lecture 1

David Morrissey TRIUMF
March 18, 2013

PIRSA:13030065
High Energy Physics
The Higgs confronts 3 universes at the LHC

Markus Luty University of California, Davis
March 13, 2013

PIRSA:13030095
High Energy Physics
Large N Chern-Simons-matter theories and three dimensional bosonization

Ofer Aharony Weizmann Institute of Science
March 12, 2013

PIRSA:13030106
High Energy Physics
Renormalization of Entanglement Entropy

Markus Luty University of California, Davis
March 12, 2013

PIRSA:13030108
High Energy Physics
Is the electron round?

Edward Hinds Imperial College London
March 08, 2013

PIRSA:13030100
High Energy Physics
12/13 PSI - Beyond the Standard Model Lecture 14
- Itay Yavin McMaster University
- Natalia Toro Stanford University
March 08, 2013

PIRSA:13030037
High Energy Physics
12/13 PSI - Beyond the Standard Model Lecture 13
- Itay Yavin McMaster University
- Natalia Toro Stanford University
March 07, 2013

PIRSA:13030036
High Energy Physics
Non-perturbative problems in gauge theories: N=2 quiver QCD

Vasily Pestun Institute for Advanced Study (IAS)
March 06, 2013

PIRSA:13030103
High Energy Physics
12/13 PSI - Beyond the Standard Model Lecture 12
- Itay Yavin McMaster University
- Natalia Toro Stanford University
March 06, 2013

PIRSA:13030035
High Energy Physics

Evidence for a new particle on the worldsheet of the QCD flux tube

Sergei Dubovsky New York University (NYU)
March 19, 2013

PIRSA:13030109
High Energy Physics
We propose a new approach for the calculation of the spectrum of excitations of QCD flux tubes. It relies on the fact that the worldsheet theory is integrable at low energies. With this approach, energy levels can be calculated for much shorter flux tubes than was previously possible, allowing for a quantitative comparison with existing lattice data. The improved theoretical control makes it manifest that existing lattice data provides strong evidence for a new pseudoscalar particle localized on the QCD fluxtube - the worldsheet axion.
Learning what the Higgs is mixed with

Kunal Kumar Carleton University
March 19, 2013

PIRSA:13030089
High Energy Physics
The Standard Model Higgs boson may be mixed with another scalar that does not couple singly to gauge bosons or fermions. The electroweak quantum numbers of such an additional scalar can be determined by measuring the quartic Higgs-Higgs-vector-vector couplings, which contribute—along with the coveted triple Higgs coupling—to double Higgs production in e+e− collisions. We show that simultaneous sensitivity to the quartic Higgs-Higgs-vector-vector coupling and the triple Higgs coupling can be obtained using measurements of the double Higgs production cross section at two different e+e− center-of-mass energies. Kinematic distributions of the two Higgs bosons in the final state could provide additional discriminating power.
12/13 PSI - Explorations in Particle Theory Lecture 2

David Morrissey TRIUMF
March 19, 2013

PIRSA:13030066
High Energy Physics
12/13 PSI - Explorations in Particle Theory Lecture 1

David Morrissey TRIUMF
March 18, 2013

PIRSA:13030065
High Energy Physics
The Higgs confronts 3 universes at the LHC

Markus Luty University of California, Davis
March 13, 2013

PIRSA:13030095
High Energy Physics
The recent discovery of the Higgs boson is a fundamental advance in particle physics. This talk gives a theorist's perspective of the significance of this discovery. The Higgs boson was proposed in the 1960s, but it is best understood in the context of the quest to understand the weak interactions, which began with Fermi's theory of weak interactions almost 80 years ago. This has led to three very different paradigms for the structure of fundamental interactions at the TeV scale: supersymmetry, compositeness/extra dimensions, and anthropic selection. The Large Hadron Collider is the experimentum crucis for deciding between these different possible universes, and the discovery of the Higgs is a crucial clue. This talk will describe these paradigms, the implications of the Higgs discovery for them, and the outlook for further discoveries that would decide between them.
Large N Chern-Simons-matter theories and three dimensional bosonization

Ofer Aharony Weizmann Institute of Science
March 12, 2013

PIRSA:13030106
High Energy Physics
I will discuss the conformal theories of N complex scalars or fermions in 2+1 dimensions, coupled to a U(N) Chern-Simons (CS) theory at level k. In the large N limit these theories have a high-spin symmetry, and, as I will review, they are dual to Vasiliev's high-spin gravity theories on four dimensional anti-de Sitter space. Maldacena and Zhiboedov showed that the high-spin symmetry determines the 2-point and 3-point functions of these theories at large N, up to two parameters. The duality to Vasiliev's gravity suggests that there is some mapping between the CS+scalar and CS+fermion theories (when one adds a quartic coupling to the scalar theories, to flow to their "critical fixed point"). We compute explicitly the large N limit of some 2-point and 3-point functions in these theories. We show that the results match with the general results of Maldacena and Zhiboedov, and they are consistent with an equivalence between the critical theory of N scalars coupled to a U(N) CS theory at level k, and the theory of k fermions coupled to a U(k) CS theory at level (N-1/2). We conjecture that this large N equivalence may be an exact duality between the scalar and fermion theories also at finite N, thus providing a bosonization of the fermionic theory. Similar results hold for real scalars (fermions) when U(N) is replaced by O(N).
Renormalization of Entanglement Entropy

Markus Luty University of California, Davis
March 12, 2013

PIRSA:13030108
High Energy Physics
The Standard Model Higgs boson may be mixed with another scalar that does not couple singly to gauge bosons or fermions. The electroweak quantum numbers of such an additional scalar can be determined by measuring the quartic Higgs-Higgs-vector-vector couplings, which contribute—along with the coveted triple Higgs coupling—to double Higgs production in e+e− collisions. We show that simultaneous sensitivity to the quartic Higgs-Higgs-vector-vector coupling and the triple Higgs coupling can be obtained using measurements of the double Higgs production cross section at two different e+e− center-of-mass energies. Kinematic distributions of the two Higgs bosons in the final state could provide additional discriminating power.
Is the electron round?

Edward Hinds Imperial College London
March 08, 2013

PIRSA:13030100
High Energy Physics
We have made a new measurement of the electron’s electric dipole moment (EDM) using a beam of YbF molecules. By measuring atto-eV energy shifts in a molecule, this experiment probes new physics at the tera-eV energy scale. According to the standard model, this EDM is d_e=10^(-38) e.cm – some eleven orders of magnitude below the current experimental limit. However, most extensions to the standard model predict much larger values, potentially accessible to measurement . Hence, the search for the electron EDM is a search for physics beyond the standard model. I will describe our experimental method, our current results and their implications for particle physics. I will also outline the prospects for further major improvement in sensitivity.
12/13 PSI - Beyond the Standard Model Lecture 14
- Itay Yavin McMaster University
- Natalia Toro Stanford University
March 08, 2013

PIRSA:13030037
High Energy Physics
12/13 PSI - Beyond the Standard Model Lecture 13
- Itay Yavin McMaster University
- Natalia Toro Stanford University
March 07, 2013

PIRSA:13030036
High Energy Physics
Non-perturbative problems in gauge theories: N=2 quiver QCD

Vasily Pestun Institute for Advanced Study (IAS)
March 06, 2013

PIRSA:13030103
High Energy Physics
Non-perturbative effects are responsible for the essential dynamical features of the four-dimensional gauge theories such as QCD. The N=2 supersymmetric four-dimensional theories are an interesting class of models in which non-perturbative computations can be carried out with arbitrary precision using localization of the path integrals. I will explain the new exact non-perturbative results and the relation to classical and quantum integrable systems for a large class of N=2 supersymmetric QCD.
12/13 PSI - Beyond the Standard Model Lecture 12
- Itay Yavin McMaster University
- Natalia Toro Stanford University
March 06, 2013

PIRSA:13030035
High Energy Physics

Title	Speaker(s)	Date	Talk Type	Info link
Evidence for a new particle on the worldsheet of the QCD flux tube	Sergei Dubovsky	2013-03-19	Scientific Series	View details
Learning what the Higgs is mixed with	Kunal Kumar	2013-03-19	Scientific Series	View details
12/13 PSI - Explorations in Particle Theory Lecture 2	David Morrissey	2013-03-19	Course	View details
12/13 PSI - Explorations in Particle Theory Lecture 1	David Morrissey	2013-03-18	Course	View details
The Higgs confronts 3 universes at the LHC	Markus Luty	2013-03-13	Scientific Series	View details
Large N Chern-Simons-matter theories and three dimensional bosonization	Ofer Aharony	2013-03-12	Scientific Series	View details
Renormalization of Entanglement Entropy	Markus Luty	2013-03-12	Scientific Series	View details
Is the electron round?	Edward Hinds	2013-03-08	Scientific Series	View details
12/13 PSI - Beyond the Standard Model Lecture 14	Itay Yavin, Natalia Toro	2013-03-08	Course	View details
12/13 PSI - Beyond the Standard Model Lecture 13	Itay Yavin, Natalia Toro	2013-03-07	Course	View details
Non-perturbative problems in gauge theories: N=2 quiver QCD	Vasily Pestun	2013-03-06	Scientific Series	View details
12/13 PSI - Beyond the Standard Model Lecture 12	Itay Yavin, Natalia Toro	2013-03-06	Course	View details

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High Energy Physics

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Evidence for a new particle on the worldsheet of the QCD flux tube

Learning what the Higgs is mixed with

12/13 PSI - Explorations in Particle Theory Lecture 2

12/13 PSI - Explorations in Particle Theory Lecture 1

The Higgs confronts 3 universes at the LHC

Large N Chern-Simons-matter theories and three dimensional bosonization

Renormalization of Entanglement Entropy

Is the electron round?

12/13 PSI - Beyond the Standard Model Lecture 14

12/13 PSI - Beyond the Standard Model Lecture 13

Non-perturbative problems in gauge theories: N=2 quiver QCD

12/13 PSI - Beyond the Standard Model Lecture 12

Evidence for a new particle on the worldsheet of the QCD flux tube

Learning what the Higgs is mixed with

12/13 PSI - Explorations in Particle Theory Lecture 2

12/13 PSI - Explorations in Particle Theory Lecture 1

The Higgs confronts 3 universes at the LHC

Large N Chern-Simons-matter theories and three dimensional bosonization

Renormalization of Entanglement Entropy

Is the electron round?

12/13 PSI - Beyond the Standard Model Lecture 14

12/13 PSI - Beyond the Standard Model Lecture 13

Non-perturbative problems in gauge theories: N=2 quiver QCD

12/13 PSI - Beyond the Standard Model Lecture 12