High Energy Physics

Displaying 1657 - 1668 of 3065

Split Dirac Supersymmetry and a Higgsino LSP
November 01, 2013

PIRSA:13110052
High Energy Physics
Gravity and the Search for New Physics with Cosmology

Kris Sigurdson University of British Columbia
October 30, 2013

PIRSA:13100098
High Energy Physics
The Geometry of Supersymmetric Partition Functions

Guido Festuccia Institute for Advanced Study (IAS) - School of Mathematics
October 29, 2013

PIRSA:13100130
High Energy Physics
Minimal Distances and the RG Flow
October 29, 2013

PIRSA:13100069
High Energy Physics
Heavy particle effective field theory: formalism, dark matter and the proton size puzzle

Richard Hill University of Kentucky
October 18, 2013

PIRSA:13100107
High Energy Physics
All AdS7 solutions of type II supergravity

Alessandro Tomasiello University of Milano-Bicocca
October 18, 2013

PIRSA:13100108
High Energy Physics
Vector Beta Function

Yu Nakayama University of California, Berkeley
October 17, 2013

PIRSA:13100082
High Energy Physics
Bootstrapping the O(N) Vector Models

David Simmons-Duffin Institute for Advanced Study (IAS)
October 15, 2013

PIRSA:13100074
High Energy Physics
Including astroparticle observables in global fits to new physics scenarios

Patrick Scott McGill University
October 15, 2013

PIRSA:13100103
High Energy Physics
Electroweak Cogenesis and a CP Violating Higgs Boson
September 24, 2013

PIRSA:13090077
High Energy Physics
Orbifolds and topological defects

Daniel Plencner Ludwig-Maximilians-Universitiät München (LMU)
September 17, 2013

PIRSA:13090061
High Energy Physics
The Era of Three Generations: Possible hints from neutrinos in elucidating the matter/antimatter asymmetry of the Universe
September 11, 2013

PIRSA:13090065
High Energy Physics

Split Dirac Supersymmetry and a Higgsino LSP
November 01, 2013

PIRSA:13110052
High Energy Physics
TBA
Gravity and the Search for New Physics with Cosmology

Kris Sigurdson University of British Columbia
October 30, 2013

PIRSA:13100098
High Energy Physics
Despite its feeble in strength, gravity plays a pivotal role in shaping our Universe and the things in it. Ever since Newton formulated his universal law of gravitation the recognition that all things gravitate has been nearly sacrosanct. Repeatedly, apparent gravitational anomalies have either foretold the existence of new physics or a misunderstanding of gravity itself, from the existence of nuclear forces to Einstein's general relativity. Eighty years ago gravity betrayed the existence of dark matter, and fifteen years ago gravity demanded dark energy from reluctant cosmologists. I will discuss how gravity enables modern cosmology to explore the echoes of the invisible universe, even if it is impossible or difficult to directly see the invisible universe. In particular, I will show how gravity enables us to put surprisingly severe constraints on the coupling of dark matter to new light particles and search for secret interactions between Fermi's elusive neutrinos. The physics and cosmic history of the invisible universe are writ large across the cosmos itself, and gravity is our tried and trusted messenger.
The Geometry of Supersymmetric Partition Functions

Guido Festuccia Institute for Advanced Study (IAS) - School of Mathematics
October 29, 2013

PIRSA:13100130
High Energy Physics
Three-dimensional N=2 theories with a U(1)_R symmetry, can be placed on a compact three manifold M preserving some supersymmetry if and only if M admits a transversely holomorphic foliation (THF). I will show that the partition function of the resulting theory is independent of the metric and depends holomorphically on the moduli of the THF. When applied to supersymmetric field theories on manifolds diffeomorphic to S^3 and S^2 x S^1, this result explains many of the properties observed in explicit determinations of their partition functions.
Minimal Distances and the RG Flow
October 29, 2013

PIRSA:13100069
High Energy Physics
We will discuss the renormalization group flow between different classes of CFTs in four dimensions and study possible lower bounds on the "distances" between these theories.
Heavy particle effective field theory: formalism, dark matter and the proton size puzzle

Richard Hill University of Kentucky
October 18, 2013

PIRSA:13100107
High Energy Physics
Heavy particle expansions, familiar from heavy quark physics, have found important applications in the analysis of dark matter candidates and their interactions with the Standard Model. From a different direction, precision spectroscopy of muonic hydrogen has challenged QED and required more precise knowledge of proton structure. These problems have forced a closer examination of the construction of general heavy particle lagrangians at high orders in the 1/M expansion, and in the absence of known ultraviolet completions. Key aspects of this formalism, including the emergence of Lorentz invariance from "nonrelativistic" lagrangians, are reviewed, and several applications are presented. A status report on the proton radius puzzle is given.
All AdS7 solutions of type II supergravity

Alessandro Tomasiello University of Milano-Bicocca
October 18, 2013

PIRSA:13100108
High Energy Physics
In M-theory, the only AdS7 supersymmetric solutions are AdS7 × S4 and its orbifolds. In this talk, I will describe a classification of AdS7 supersymmetric solutions in type II supergravity. While in IIB none exist, in IIA with Romans mass (which does not lift to M-theory) there are many new ones. The classification starts from a pure spinor approach reminiscent of generalized complex geometry. Without the need for any Ansatz, the method determines uniquely the form of the metric and fluxes, up to solving a system of ODEs. Namely, the metric on M3 is that of an S2 fibered over an interval; this is consistent with the Sp(1) R-symmetry of the holographically dual (1,0) theory. One can obtain numerically many solutions, with D8 and/or D6 brane sources; topologically, the internal manifold M3 = S^3.
Vector Beta Function

Yu Nakayama University of California, Berkeley
October 17, 2013

PIRSA:13100082
High Energy Physics
We propose various properties of renormalization group beta functions for vector operators in relativistic quantum field theories. We argue that they must satisfy compensated gauge invariance, orthogonality with respect to scalar beta functions, Higgs-like relation among anomalous dimensions and a gradient property. We further conjecture that non-renormalization holds if and only if the vector operator is conserved. The local renormalization group analysis guarantees the first three within power counting renormalization. We verify all the conjectures in conformal perturbation theories and holography in the weakly coupled gravity regime.
Bootstrapping the O(N) Vector Models

David Simmons-Duffin Institute for Advanced Study (IAS)
October 15, 2013

PIRSA:13100074
High Energy Physics
We study the conformal bootstrap for 3D CFTs with O(N) global symmetry. We obtain rigorous upper bounds on the scaling dimensions of the first O(N) singlet and symmetric tensor operators appearing in the \phi_i x \phi_j OPE, where \phi_i is a fundamental of O(N). Comparing these bounds to previous determinations of critical exponents in the O(N) vector models, we find strong numerical evidence that the O(N) vector models saturate the bootstrap constraints at all values of N. We also compute general lower bounds on the central charge, giving numerical predictions for the values realized in the O(N) vector models. We compare our predictions to previous computations in the 1/N expansion, finding precise agreement at large values of N.
Including astroparticle observables in global fits to new physics scenarios

Patrick Scott McGill University
October 15, 2013

PIRSA:13100103
High Energy Physics
Searches for physics beyond the standard model come in many forms, from terrestrial probes to astroparticle experiments and cosmological observations. Efforts to combine multiple search channels in 'global fits' to new physics scenarios typically consider only a subset of the available channels. Astroparticle searches in particular are usually only included in a very approximate way, if at all. In this talk I will review recent progress in including detailed gamma-ray, neutrino and CMB searches for dark matter in global fits. I will also preview some of the future developments and challenges in this field, where the applicability of global fits will move well beyond the small range of constrained supersymmetric models they have so far mostly been applied to.
Electroweak Cogenesis and a CP Violating Higgs Boson
September 24, 2013

PIRSA:13090077
High Energy Physics
We propose a simple renormalizable model of baryogenesis and asymmetric dark matter generation at the electroweak phase transition. Our setup utilizes the two Higgs doublet model plus two complex gauge singlets, the lighter of which is stable dark matter. The dark matter is charged under a global symmetry that is broken in the early universe but restored during the electroweak phase transition. Because the ratio of baryon and dark matter asymmetries is controlled by model parameters, the dark matter need not be light. Thus, new force carriers are unnecessary and the symmetric dark matter abundance can be eliminated via Higgs portal interactions alone. The dark matter mass is also constrained within a window around the weak scale. One of the main predictions of this model is CP violating Higgs signals at the LHC and future colliders.
Orbifolds and topological defects

Daniel Plencner Ludwig-Maximilians-Universitiät München (LMU)
September 17, 2013

PIRSA:13090061
High Energy Physics
Orbifolding a 2-dimensional quantum field theory by a symmetry group admits an elegant description in terms of defect lines and their junction fields. This perspective offers a natural generalization of the concept of an orbifold, in which the role of the symmetry group is replaced by a defect with the structure of a (symmetric) separable Frobenius algebra. In this talk I will focus on the case of Landau-Ginzburg models, in which defects are described by matrix factorizations. After introducing the generalized twisted sectors and discussing topological bulk and boundary correlators in these sectors, I will present a simple proof of the Cardy condition and discuss some further consistency checks on the generalized orbifold theory. This talk is based on arXiv:1307.3141 with Ilka Brunner and Nils Carqueville.
The Era of Three Generations: Possible hints from neutrinos in elucidating the matter/antimatter asymmetry of the Universe
September 11, 2013

PIRSA:13090065
High Energy Physics
Despite being one of the most abundant constituents of the Universe and more than a half a century of study, some of the most fundamental properties of the neutrino have only been recently uncovered, and others still remain unresolved. I will discuss important developments in the phenomenon of neutrino oscillations, a transmutation process that allows neutrinos to change between three types as they propagate in time. In particular, recent discoveries have opened up the possibility of CP violation in neutrino oscillations, asymmetries in the behavior of neutrinos and their anti-matter counterparts. CP violation, along with other unresolved properties of the neutrino, may play a central role in how the universe came to a matter-dominated state. I will also discuss a new generation of experiments that may allow us to establish whether CP violation does indeed occur in neutrino oscillations.

Title	Speaker(s)	Date	Talk Type	Info link
Split Dirac Supersymmetry and a Higgsino LSP		2013-11-01	Scientific Series	View details
Gravity and the Search for New Physics with Cosmology	Kris Sigurdson	2013-10-30	Scientific Series	View details
The Geometry of Supersymmetric Partition Functions	Guido Festuccia	2013-10-29	Scientific Series	View details
Minimal Distances and the RG Flow		2013-10-29	Scientific Series	View details
Heavy particle effective field theory: formalism, dark matter and the proton size puzzle	Richard Hill	2013-10-18	Scientific Series	View details
All AdS7 solutions of type II supergravity	Alessandro Tomasiello	2013-10-18	Scientific Series	View details
Vector Beta Function	Yu Nakayama	2013-10-17	Scientific Series	View details
Bootstrapping the O(N) Vector Models	David Simmons-Duffin	2013-10-15	Scientific Series	View details
Including astroparticle observables in global fits to new physics scenarios	Patrick Scott	2013-10-15	Scientific Series	View details
Electroweak Cogenesis and a CP Violating Higgs Boson		2013-09-24	Scientific Series	View details
Orbifolds and topological defects	Daniel Plencner	2013-09-17	Scientific Series	View details
The Era of Three Generations: Possible hints from neutrinos in elucidating the matter/antimatter asymmetry of the Universe		2013-09-11	Scientific Series	View details

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High Energy Physics

Format results

Split Dirac Supersymmetry and a Higgsino LSP

Gravity and the Search for New Physics with Cosmology

The Geometry of Supersymmetric Partition Functions

Minimal Distances and the RG Flow

Heavy particle effective field theory: formalism, dark matter and the proton size puzzle

All AdS7 solutions of type II supergravity

Vector Beta Function

Bootstrapping the O(N) Vector Models

Including astroparticle observables in global fits to new physics scenarios

Electroweak Cogenesis and a CP Violating Higgs Boson

Orbifolds and topological defects

The Era of Three Generations: Possible hints from neutrinos in elucidating the matter/antimatter asymmetry of the Universe

Split Dirac Supersymmetry and a Higgsino LSP

Gravity and the Search for New Physics with Cosmology

The Geometry of Supersymmetric Partition Functions

Minimal Distances and the RG Flow

Heavy particle effective field theory: formalism, dark matter and the proton size puzzle

All AdS7 solutions of type II supergravity

Vector Beta Function

Bootstrapping the O(N) Vector Models

Including astroparticle observables in global fits to new physics scenarios

Electroweak Cogenesis and a CP Violating Higgs Boson

Orbifolds and topological defects

The Era of Three Generations: Possible hints from neutrinos in elucidating the matter/antimatter asymmetry of the Universe