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Improving Mass Measurements Using Many-Body Phase Space

Can Kilic The University of Texas at Austin
July 15, 2014

PIRSA:14070023
High Energy Physics
The Exact Renormalization Group and Higher Spin Holography.

Rob Leigh University of Illinois Urbana-Champaign
June 17, 2014

PIRSA:14060047
High Energy Physics
What Can We Learn from Precision Higgs

Maxim Perelstein Cornell University
June 13, 2014

PIRSA:14060003
High Energy Physics
Gauge fields in de Sitter space: antipodal symmetry and holography

Yasha Neiman Okinawa Institute of Science and Technology Graduate University
June 03, 2014

PIRSA:14060039
High Energy Physics
Are the recent IceCube events hinting at O(100) TeV decaying dark matter?

Atri Bhattacharya University of Liège
May 22, 2014

PIRSA:14050118
High Energy Physics
M-strings and their orbifolds

Babak Haghighat Harvard University
May 20, 2014

PIRSA:14050005
High Energy Physics
Unitarity and crossing symmetry in the S-matirx of large N Chern-Simons theory with fundamental matter

Shiraz Minwalla Tata Institute of Fundamental Research (TIFR)
May 13, 2014

PIRSA:14050006
High Energy Physics
New strong interactions and the t t-bar asymmetry

Joachim Brod University of Cincinnati
May 13, 2014

PIRSA:14050092
High Energy Physics
Anomalies of discrete symmetries and Symmetry Protected Topological Phases

Anton Kapustin California Institute of Technology (Caltech) - Division of Physics Mathematics & Astronomy
May 06, 2014

PIRSA:14050035
High Energy Physics
Noncommutative geometry and the symmetries of the standard model

Fedele Lizzi University of Naples Federico II
May 06, 2014

PIRSA:14050031
High Energy Physics

Astrophysics
Probing renormalization group flows using entanglement entropy

Mark Mezei Massachusetts Institute of Technology (MIT)
April 30, 2014

PIRSA:14040144
High Energy Physics
Localizing Braneworlds in Infinite Spaces

Kellogg Stelle Imperial College London
April 29, 2014

PIRSA:14040064
High Energy Physics

Improving Mass Measurements Using Many-Body Phase Space

Can Kilic The University of Texas at Austin
July 15, 2014

PIRSA:14070023
High Energy Physics
After the 7 and 8 TeV LHC runs, we have no conclusive evidence of physics beyond the Standard Model, leading us to suspect that even if new physics is discovered during run II, the number of signal events may be limited, making it crucial to optimize measurements for the case of low statistics. I will argue that phase space correlations between subsequent on-shell decays in a cascade contain additional information compared to commonly used kinematic variables, and this can be used to significantly improve the precision and accuracy of mass measurements. The improvement is connected to the properties of the volume element of many-body phase space, and is particularly relevant to the case of low signal statistics.
The Exact Renormalization Group and Higher Spin Holography.

Rob Leigh University of Illinois Urbana-Champaign
June 17, 2014

PIRSA:14060047
High Energy Physics
What Can We Learn from Precision Higgs

Maxim Perelstein Cornell University
June 13, 2014

PIRSA:14060003
High Energy Physics
In the coming years, LHC experiments will measure Higgs properties, such as its couplings, with increasing precision. Electron-positron Higgs factories, such as the ILC or TLEP, would be able to achieve even better precision. In this talk, I will discuss some of the physics questions that can be addressed by a precision Higgs coupling measurement program. First, the issue of naturalness of the electroweak scale can be addressed in a robust, model-independent manner. Second, the possibility of a first-order electroweak phase transition can be definitively probed, testing one of the necessary conditions of electroweak baryogenesis scenario.
Gauge fields in de Sitter space: antipodal symmetry and holography

Yasha Neiman Okinawa Institute of Science and Technology Graduate University
June 03, 2014

PIRSA:14060039
High Energy Physics
There is a proposed dS/CFT duality in 3+1 dimensions, with higher-spin gravity in the bulk subject to Bunch-Davies boundary conditions. I consider replacing these with antipodally symmetric conditions, which allow for real values of the bulk fields. I present spanning sets of solutions in global dS_4 for free gauge fields of all spins (including photons and gravitons), and use them to establish relations between antipodal symmetry and asymptotic behavior. Some of these relations can be extended to interacting theories, including ordinary and higher-spin gravity. I discuss the implications for antipodally symmetric dS/CFT.
Are the recent IceCube events hinting at O(100) TeV decaying dark matter?

Atri Bhattacharya University of Liège
May 22, 2014

PIRSA:14050118
High Energy Physics
The IceCube detector has recently reported the observation of 28 events at previously unexplored energies. While the statistics of the observed events are still low, these events hint at the existence of a neutrino flux over and above the atmospheric neutrino background. We investigate the possibility that a significant component of the additional neutrino flux originates due to the decay of a very heavy dark matter (VHDM) particle via several possible channels into standard model particles. We show that a combination of a power law astrophysical neutrino spectrum and the neutrino flux from the decay of a DM species of mass in the range 150-400 TeV improves the fit to the observed neutrino events than that obtained from a best-fit astrophysical flux alone. Assuming the existence of an astrophysical background described by the IC best-fit, we also show that, for the decay of even heavier DM particles ($m_{\text{DM}} \sim 1$ PeV), the same observations impose significant constraints on the decay lifetimes. Allowing the astrophysical flux normalization to vary leads to modifications of these limits; however, there is still a range of dark matter mass and lifetime that is excluded by the IC results.
M-strings and their orbifolds

Babak Haghighat Harvard University
May 20, 2014

PIRSA:14050005
High Energy Physics
We consider M-theory in the presence of M parallel M5-branes probing a transverse A_{N-1} singularity. This leads to a superconformal theory with (1,0) supersymmetry in six dimensions. We compute the supersymmetric partition function of this theory on a two-torus, with arbitrary supersymmetry preserving twists, using the topological vertex formalism. Alternatively, we show that this can also be obtained by computing the elliptic genus of an orbifold of recently studied M-strings. The resulting 2d theory is a (4,0) supersymmetric quiver gauge theory whose Higgs branch corresponds to strings propagating on the moduli space of SU(N)^(M-1) instantons on R^4 where the right-moving fermions are coupled to a particular bundle.
Unitarity and crossing symmetry in the S-matirx of large N Chern-Simons theory with fundamental matter

Shiraz Minwalla Tata Institute of Fundamental Research (TIFR)
May 13, 2014

PIRSA:14050006
High Energy Physics
We present explicit computations and conjectures for 2 → 2 scattering matrices in large N U(N) Chern-Simons theories coupled to fundamental bosonic or fermionic matter to all orders in the ’t Hooft coupling expansion. The bosonic and fermionic S-matrices map to each other under the recently conjectured Bose-Fermi duality after a level-rank transposition. The S-matrices presented in this paper may be regarded as relativistic generalization of Aharonov-Bohm scattering. They have unusual structural features: they include a non analytic piece localized on forward scattering, and obey modified crossing symmetry rules. We conjecture that these unusual features are properties of S-matrices in all Chern-Simons matter theories. The S-matrix in one of the exchange channels in our paper has an anyonic character; the parameter map of the conjectured Bose-Fermi duality may be derived by equating the anyonic phase in the bosonic and fermionic theories.
New strong interactions and the t t-bar asymmetry

Joachim Brod University of Cincinnati
May 13, 2014

PIRSA:14050092
High Energy Physics
The CDF and D0 experiments at Tevatron measure a top-quark forward-backward
asymmetry significantly larger than the standard-model prediction.
We construct a model that involves new strong interactions at the electroweak scale
and can explain the measured asymmetry. Our model possesses a flavor symmetry
which allows to evade flavor and collider constraints, while it still permits flavor-violating
couplings of order 1 which are needed to generate the asymmetry via light t-channel vectors.
Anomalies of discrete symmetries and Symmetry Protected Topological Phases

Anton Kapustin California Institute of Technology (Caltech) - Division of Physics Mathematics & Astronomy
May 06, 2014

PIRSA:14050035
High Energy Physics
There is a close connection between Symmetry Protected Topological Phases and anomalies: a surface of an SPT phase typically has a global symmetry with a nonvanishing 't Hooft anomaly which is canceled by the anomaly inflow from the bulk. This observation together with the known results about the classification of SPT phases suggest that anomalies are much more ubiquitous than thought previously and do not require chiral fermions We elucidate the physical mechanism of anomalies and give examples of bosonic theories with 't Hooft anomalies in various dimensions.
Noncommutative geometry and the symmetries of the standard model

Fedele Lizzi University of Naples Federico II
May 06, 2014

PIRSA:14050031
High Energy Physics

Astrophysics
I will describe Connes approach to the standard model based on spectral noncommutative geometry with particular emphasis on the symmetries. The model poses constraints which are satisfied by the standard model group, and does not leave much room for other possibilities. There is however a possibility for a larger symmetry (the ``grand algebra'') which may also be instrumental to obtain the correct mass of the Higgs.
Probing renormalization group flows using entanglement entropy

Mark Mezei Massachusetts Institute of Technology (MIT)
April 30, 2014

PIRSA:14040144
High Energy Physics
The entanglement entropy of the vacuum of a quantum field theory contains information about physics at all scales and is UV sensitive. A simple refinement of entanglement entropy gets rid of its UV divergence, and allows us to extract entanglement per scale. In two and three spacetime dimensions this quantity can be used as a proxy for the number of degrees of freedom, as it decreases under RG flow. We investigate its behavior around fixed points, and reveal its interesting analytic structure in the space of couplings.
Localizing Braneworlds in Infinite Spaces

Kellogg Stelle Imperial College London
April 29, 2014

PIRSA:14040064
High Energy Physics
There have been a number of attempts to achieve a localization of gravity on a braneworld hypersurface embedded in an infinite spacetime, but these have all fallen short of what might be desired, for various reasons. There have even been no-go theorems claimed for constructions made using just accepted elements of string or M theory. The talk will present a proposed resolution of this problem based upon a hyperbolic solution of type IIA theory with a superposed NS-5 brane. Gravity is bound to the brane surface owing to the existence of a single normalizable bound state of the transverse space Laplacian.

Title	Date	Collection	Type	Info
Improving Mass Measurements Using Many-Body Phase Space	2014‑07‑15	Particle Physics	Scientific Series	View details
The Exact Renormalization Group and Higher Spin Holography.	2014‑06‑17	Quantum Fields and Strings	Scientific Series	View details
What Can We Learn from Precision Higgs	2014‑06‑13	Particle Physics	Scientific Series	View details
Gauge fields in de Sitter space: antipodal symmetry and holography	2014‑06‑03	Quantum Fields and Strings	Scientific Series	View details
Are the recent IceCube events hinting at O(100) TeV decaying dark matter?	2014‑05‑22	Particle Physics	Scientific Series	View details
M-strings and their orbifolds	2014‑05‑20	Quantum Fields and Strings	Scientific Series	View details
Unitarity and crossing symmetry in the S-matirx of large N Chern-Simons theory with fundamental matter	2014‑05‑13	Quantum Fields and Strings	Scientific Series	View details
New strong interactions and the t t-bar asymmetry	2014‑05‑13	Particle Physics	Scientific Series	View details
Anomalies of discrete symmetries and Symmetry Protected Topological Phases	2014‑05‑06	Quantum Fields and Strings	Scientific Series	View details
Noncommutative geometry and the symmetries of the standard model	2014‑05‑06	Particle Physics	Scientific Series	View details
Probing renormalization group flows using entanglement entropy	2014‑04‑30	Quantum Fields and Strings	Scientific Series	View details
Localizing Braneworlds in Infinite Spaces	2014‑04‑29	Quantum Fields and Strings	Scientific Series	View details

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Improving Mass Measurements Using Many-Body Phase Space

The Exact Renormalization Group and Higher Spin Holography.

What Can We Learn from Precision Higgs

Gauge fields in de Sitter space: antipodal symmetry and holography

Are the recent IceCube events hinting at O(100) TeV decaying dark matter?

M-strings and their orbifolds

Unitarity and crossing symmetry in the S-matirx of large N Chern-Simons theory with fundamental matter

New strong interactions and the t t-bar asymmetry

Anomalies of discrete symmetries and Symmetry Protected Topological Phases

Noncommutative geometry and the symmetries of the standard model

Probing renormalization group flows using entanglement entropy

Localizing Braneworlds in Infinite Spaces

Improving Mass Measurements Using Many-Body Phase Space

The Exact Renormalization Group and Higher Spin Holography.

What Can We Learn from Precision Higgs

Gauge fields in de Sitter space: antipodal symmetry and holography

Are the recent IceCube events hinting at O(100) TeV decaying dark matter?

M-strings and their orbifolds

Unitarity and crossing symmetry in the S-matirx of large N Chern-Simons theory with fundamental matter

New strong interactions and the t t-bar asymmetry

Anomalies of discrete symmetries and Symmetry Protected Topological Phases

Noncommutative geometry and the symmetries of the standard model

Probing renormalization group flows using entanglement entropy

Localizing Braneworlds in Infinite Spaces