High Energy Physics

Displaying 1705 - 1716 of 3012

FERMI 130 GeV Line: Dark Interpretations

Matthew McCullough Massachusetts Institute of Technology (MIT)
February 26, 2013

PIRSA:13020150
High Energy Physics
12/13 PSI - Beyond the Standard Model Lecture 6
- Itay Yavin McMaster University
- Natalia Toro Stanford University
February 26, 2013

PIRSA:13020096
High Energy Physics
12/13 PSI - Beyond the Standard Model Lecture 5
- Itay Yavin McMaster University
- Natalia Toro Stanford University
February 25, 2013

PIRSA:13020095
High Energy Physics
12/13 PSI - Beyond the Standard Model Lecture 4
- Itay Yavin McMaster University
- Natalia Toro Stanford University
February 22, 2013

PIRSA:13020092
High Energy Physics
boosted top: lessons learnt

Marcel Vos University of Valencia
February 21, 2013

PIRSA:13020141
High Energy Physics
Jet substructure in BSM physics

Jay Wacker Quora Inc.
February 21, 2013

PIRSA:13020143
High Energy Physics
12/13 PSI - Beyond the Standard Model Lecture 3
- Itay Yavin McMaster University
- Natalia Toro Stanford University
February 21, 2013

PIRSA:13020091
High Energy Physics
12/13 PSI - Beyond the Standard Model Lecture 2
- Itay Yavin McMaster University
- Natalia Toro Stanford University
February 20, 2013

PIRSA:13020090
High Energy Physics
Wall-Crossing and Quiver Invariants

Piljin Yi Korea Institute for Advanced Study
February 19, 2013

PIRSA:13020137
High Energy Physics
Qanti-kt: Nondeterministic jet clustering

David Krohn Harvard University
February 19, 2013

PIRSA:13020135
High Energy Physics
12/13 PSI - Beyond the Standard Model Lecture 1
- Itay Yavin McMaster University
- Natalia Toro Stanford University
February 19, 2013

PIRSA:13020089
High Energy Physics
Time Crystals

Alfred Shapere University of Kentucky
February 05, 2013

PIRSA:13020121
High Energy Physics

FERMI 130 GeV Line: Dark Interpretations

Matthew McCullough Massachusetts Institute of Technology (MIT)
February 26, 2013

PIRSA:13020150
High Energy Physics
Last year strong evidence was claimed for a 130 GeV gamma ray line from the galactic center in the FERMI telescope data. In the first half of the talk I will review the status of the evidence, including recent suggestions which call it into question. In the second half of the talk, under the bold assumption that the line is a genuine signature of dark matter, I will review some of the properties required of dark matter to explain the line and the general features of models proposed to explain it. This second half will include material from recent work with Francesco D'Eramo and Jesse Thaler (arxiv:1210.7817), which suggests that the line is readily explained by dark matter "semi-annihilation" rather than the standard annihilation interpretation.
12/13 PSI - Beyond the Standard Model Lecture 6
- Itay Yavin McMaster University
- Natalia Toro Stanford University
February 26, 2013

PIRSA:13020096
High Energy Physics
12/13 PSI - Beyond the Standard Model Lecture 5
- Itay Yavin McMaster University
- Natalia Toro Stanford University
February 25, 2013

PIRSA:13020095
High Energy Physics
12/13 PSI - Beyond the Standard Model Lecture 4
- Itay Yavin McMaster University
- Natalia Toro Stanford University
February 22, 2013

PIRSA:13020092
High Energy Physics
boosted top: lessons learnt

Marcel Vos University of Valencia
February 21, 2013

PIRSA:13020141
High Energy Physics
I briefly summarize the potential of the LHC to produce boosted objects and that of the experiments to recognize them as such analyzing jet substructure. Then, I consider boosted top quarks in some detail, the boosted object that has probably been most extensively studied. I evaluate ATLAS ttbar resonance searches to understand how and why dedicated algorithms outperform more classical techniques. Finally, I discuss a number of analyses where boosted techniques are likely to make a difference
Jet substructure in BSM physics

Jay Wacker Quora Inc.
February 21, 2013

PIRSA:13020143
High Energy Physics
12/13 PSI - Beyond the Standard Model Lecture 3
- Itay Yavin McMaster University
- Natalia Toro Stanford University
February 21, 2013

PIRSA:13020091
High Energy Physics
12/13 PSI - Beyond the Standard Model Lecture 2
- Itay Yavin McMaster University
- Natalia Toro Stanford University
February 20, 2013

PIRSA:13020090
High Energy Physics
Wall-Crossing and Quiver Invariants

Piljin Yi Korea Institute for Advanced Study
February 19, 2013

PIRSA:13020137
High Energy Physics
We start with a one-slide review of the Kontsevich-Soibelman (KS) solution to the wall-crossing problem and then proceed to direct and comprehensive physics counting of BPS states that eventually connects to KS. We also asks what input data is needed for either approaches to produce complete BPS spectra, and this naturally leads to the BPS quiver representation of BPS states and the new notion of quiver invariants.
We propose a simple geometrical conjecture that can segregate BPS states in Higgs phases of the BPS quiver dynamics to those that experience wall-crossing and those that do not, and give
proofs for all cyclice Abelian quivers. We close with explanation of how physics distinguishes two such classes of BPS states.
Qanti-kt: Nondeterministic jet clustering

David Krohn Harvard University
February 19, 2013

PIRSA:13020135
High Energy Physics
The interpretation of events with jets is often ambiguous, especially for the sort of highly complex events one encounters at the LHC. One often finds that an event interpreted as signal-like using one choice of jet algorithm and radius parameter is no longer signal-like with another, even if the two are very similar. Here we present an extension of the Qjets procedure designed to account for this ambiguity and assign each plausible interpretation of an event a weight, so that events which are unambiguously signal-like carry more influence on one's results than events which are only marginally so. This procedure can be used with any existing analysis employing a sequential recombination algorithm like anti-kT and we will show that through its use the statistical power of an analysis often increases. In particular, we will see that a up to a 20\% improvement in statistical significance can be realized for a Higgs-like analysis searching for a resonance recoiling against an associated vector boson.
12/13 PSI - Beyond the Standard Model Lecture 1
- Itay Yavin McMaster University
- Natalia Toro Stanford University
February 19, 2013

PIRSA:13020089
High Energy Physics
Time Crystals

Alfred Shapere University of Kentucky
February 05, 2013

PIRSA:13020121
High Energy Physics
I consider a class of simple classical systems which exhibit motion in their lowest-energy states and thus spontaneously break time-translation symmetry. Their Lagrangians have nonstandard kinetic terms and their Hamiltonians are multivalued functions of momentum, yet they are perfectly consistent and amenable to quantization. Field theoretical generalizations of these systems may have applications in condensed matter physics and cosmology.

Title	Speaker(s)	Date	Talk Type	Info link
FERMI 130 GeV Line: Dark Interpretations	Matthew McCullough	2013-02-26	Scientific Series	View details
12/13 PSI - Beyond the Standard Model Lecture 6	Itay Yavin, Natalia Toro	2013-02-26	Course	View details
12/13 PSI - Beyond the Standard Model Lecture 5	Itay Yavin, Natalia Toro	2013-02-25	Course	View details
12/13 PSI - Beyond the Standard Model Lecture 4	Itay Yavin, Natalia Toro	2013-02-22	Course	View details
boosted top: lessons learnt	Marcel Vos	2013-02-21	Conference	View details
Jet substructure in BSM physics	Jay Wacker	2013-02-21	Conference	View details
12/13 PSI - Beyond the Standard Model Lecture 3	Itay Yavin, Natalia Toro	2013-02-21	Course	View details
12/13 PSI - Beyond the Standard Model Lecture 2	Itay Yavin, Natalia Toro	2013-02-20	Course	View details
Wall-Crossing and Quiver Invariants	Piljin Yi	2013-02-19	Scientific Series	View details
Qanti-kt: Nondeterministic jet clustering	David Krohn	2013-02-19	Scientific Series	View details
12/13 PSI - Beyond the Standard Model Lecture 1	Itay Yavin, Natalia Toro	2013-02-19	Course	View details
Time Crystals	Alfred Shapere	2013-02-05	Scientific Series	View details

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High Energy Physics

Format results

FERMI 130 GeV Line: Dark Interpretations

12/13 PSI - Beyond the Standard Model Lecture 6

12/13 PSI - Beyond the Standard Model Lecture 5

12/13 PSI - Beyond the Standard Model Lecture 4

boosted top: lessons learnt

Jet substructure in BSM physics

12/13 PSI - Beyond the Standard Model Lecture 3

12/13 PSI - Beyond the Standard Model Lecture 2

Wall-Crossing and Quiver Invariants

Qanti-kt: Nondeterministic jet clustering

12/13 PSI - Beyond the Standard Model Lecture 1

Time Crystals

FERMI 130 GeV Line: Dark Interpretations

12/13 PSI - Beyond the Standard Model Lecture 6

12/13 PSI - Beyond the Standard Model Lecture 5

12/13 PSI - Beyond the Standard Model Lecture 4

boosted top: lessons learnt

Jet substructure in BSM physics

12/13 PSI - Beyond the Standard Model Lecture 3

12/13 PSI - Beyond the Standard Model Lecture 2

Wall-Crossing and Quiver Invariants

Qanti-kt: Nondeterministic jet clustering

12/13 PSI - Beyond the Standard Model Lecture 1

Time Crystals