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Search results in High Energy Physics from PIRSA

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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
Thermodynamical Property of Entanglement Entropy for Excited States and Holographic Local Quench

Masahiro Nozaki University of Chicago
March 05, 2013

PIRSA:13030081
High Energy Physics
The correlator of two vector and one axial current in QCD

Kirill Melnikov Johns Hopkins University
March 05, 2013

PIRSA:13030099
High Energy Physics
12/13 PSI - Beyond the Standard Model Lecture 11
- Itay Yavin McMaster University
- Natalia Toro Stanford University
March 05, 2013

PIRSA:13030034
High Energy Physics
12/13 PSI - Beyond the Standard Model Lecture 10
- Itay Yavin McMaster University
- Natalia Toro Stanford University
March 04, 2013

PIRSA:13030033
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
Thermodynamical Property of Entanglement Entropy for Excited States and Holographic Local Quench

Masahiro Nozaki University of Chicago
March 05, 2013

PIRSA:13030081
High Energy Physics
In this talk, we will describe our recent work. Recently, we focus on the thermodynamical property and time dependence of entanglement entropy. Using holography, we found that the entanglement entropy for a very small subsystem obeys a property which is analogous to the first law of thermodynamics when we excite the system. In relativistic setups, its effective temperature is proportional to the inverse of the subsystem size. This provides a universal relationship between the energy and the amount of quantum information. Moreover, we will propose a new holographic model of local quench and describe some results which we got by using this model. This talk is based on arXiv:1212.1164 [hep-th] and arXiv:1302.5703 [hep-th].
The correlator of two vector and one axial current in QCD

Kirill Melnikov Johns Hopkins University
March 05, 2013

PIRSA:13030099
High Energy Physics
It is known that the correlator of one axial and two vector currents, that receives leading contributions through one-loop fermion triangle diagrams, is not modified by QCD radiative corrections at two loops. It was suggested that this non-renormalization of the VVA correlator persists in higher orders in perturbative QCD as well. To check this assertion, I compute the three-loop QCD corrections to the VAA-correlator using the technique of asymptotic expansions. I find that these corrections do not vanish and that they are proportional to the QCD beta-function. I will also review some properties of the VVA correlator that were discovered in recent years.
12/13 PSI - Beyond the Standard Model Lecture 11
- Itay Yavin McMaster University
- Natalia Toro Stanford University
March 05, 2013

PIRSA:13030034
High Energy Physics
12/13 PSI - Beyond the Standard Model Lecture 10
- Itay Yavin McMaster University
- Natalia Toro Stanford University
March 04, 2013

PIRSA:13030033
High Energy Physics

Title	Date	Collection	Type	Info
The Higgs confronts 3 universes at the LHC	2013‑03‑13	Colloquium	Scientific Series	View details
Large N Chern-Simons-matter theories and three dimensional bosonization	2013‑03‑12	Quantum Fields and Strings	Scientific Series	View details
Renormalization of Entanglement Entropy	2013‑03‑12	Particle Physics	Scientific Series	View details
Is the electron round?	2013‑03‑08	Particle Physics	Scientific Series	View details
12/13 PSI - Beyond the Standard Model Lecture 14	2013‑03‑08	12/13 PSI - Beyond the Standard Model	Course	View details
12/13 PSI - Beyond the Standard Model Lecture 13	2013‑03‑07	12/13 PSI - Beyond the Standard Model	Course	View details
Non-perturbative problems in gauge theories: N=2 quiver QCD	2013‑03‑06	Colloquium	Scientific Series	View details
12/13 PSI - Beyond the Standard Model Lecture 12	2013‑03‑06	12/13 PSI - Beyond the Standard Model	Course	View details
Thermodynamical Property of Entanglement Entropy for Excited States and Holographic Local Quench	2013‑03‑05	Quantum Fields and Strings	Scientific Series	View details
The correlator of two vector and one axial current in QCD	2013‑03‑05	Particle Physics	Scientific Series	View details
12/13 PSI - Beyond the Standard Model Lecture 11	2013‑03‑05	12/13 PSI - Beyond the Standard Model	Course	View details
12/13 PSI - Beyond the Standard Model Lecture 10	2013‑03‑04	12/13 PSI - Beyond the Standard Model	Course	View details

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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

Thermodynamical Property of Entanglement Entropy for Excited States and Holographic Local Quench

The correlator of two vector and one axial current in QCD

12/13 PSI - Beyond the Standard Model Lecture 11

12/13 PSI - Beyond the Standard Model Lecture 10

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

Thermodynamical Property of Entanglement Entropy for Excited States and Holographic Local Quench

The correlator of two vector and one axial current in QCD

12/13 PSI - Beyond the Standard Model Lecture 11

12/13 PSI - Beyond the Standard Model Lecture 10