14th International Symposium on Particles, Strings and Cosmology (PASCOS '08)
Organizer(s): Robert Myers Freddy Cachazo Jaume Gomis Cliff Burgess Justin Khoury James Taylor Maxim Pospelov Alex Buchel
Collection URL: http://pirsa.org/C08012
LHC: The Countdown
Abstract: The CERN Large Hadron Collider is nearing completion. Both the ATLAS and CMS experiments are being completed, and the accelerator is proceeding through cool-down to cryogenic temperatures in preparation for first beam. The timescales and prospects for first beam, collisions and physics will be discu...
read moreDate: 02/06/2008 - 9:00 am
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TeV-Scale Physics in the LHC Era
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Date: 02/06/2008 - 9:35 am
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TBA
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Date: 02/06/2008 - 10:10 am
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Conformal SUSY Breaking and Cosmological Constant
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Date: 02/06/2008 - 11:15 am
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Particle Dark Matter: What Comes Next?
Abstract: After a brief introduction, where I review the properties of the 'good Dark Matter candidate' and the status of accelerator, direct and indirect Dark Matter searches, I will show that a conclusive identification of DM particles can most likely be achieved only through a 'multidisciplinary' approach,...
read moreDate: 02/06/2008 - 11:50 am
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F-theory and GUTs: Experimental Predictions
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Date: 02/06/2008 - 12:25 pm
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Cosmology from WMAP
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Date: 02/06/2008 - 2:30 pm
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Some Thoughts on Dark Energy, Inflation and Extra Dimensions
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Date: 02/06/2008 - 3:05 pm
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Fundamental Physics from 21cm Cosmology
Speaker(s):
Avi Loeb - Harvard University
Abstract: The atomic hydrogen gas left over from the Big Bang was affected by processes ranging from quantum fluctuations during the early epoch of inflation to irradiation by the first galaxies at late times. Mapping this gas through its resonant 21cm line serves a dual role as a powerful probe of both funda...
read moreDate: 02/06/2008 - 3:40 pm
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Monodromy in the CMB: Gravity Waves and String Inflation
Abstract: The sensitivity of inflationary models to Planck-suppressed operators motivates modeling inflation in string theory. The case of high-scale inflation is particularly interesting both theoretically and observationally. Observationally it yields a gravity wave (B mode polarization) signature, and theo...
read moreDate: 02/06/2008 - 4:45 pm
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Cosmological Implications of LARGE Volume String Compactifications
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Date: 02/06/2008 - 5:20 pm
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Unitary Representations of the Conformal Group for pedestrians
Abstract: We comment on several points concerning unparticles which have been overlooked in the literature. One regards Mack's unitarity constraint lower bounds on CFT operator dimensions,e.g,. d>= 3 for primary, gauge invariant, vector unparticle operators. We correct the results in the literature to account...
read moreDate: 02/06/2008 - 5:55 pm
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Phenomenology of Massive Neutrinos
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Date: 03/06/2008 - 9:00 am
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Results from the MiniBooNE Experiment
Abstract: We present the results from the MiniBooNE neutrino oscillations search in which no significant excess of events is observed above background in the energy range from 475 MeV to 3000 MeV. For lower energies an excess of events that is not consistent with a two neutrino oscillation model is observed. ...
read moreDate: 03/06/2008 - 9:35 am
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Negative Curvature
Abstract: I will discuss the possibilities for a post-standard-cosmological-model phenomenology based on the assumption that our universe was born in a tunneling event from an earlier 'Ancestor' vacuum
Date: 03/06/2008 - 10:10 am
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Big Bang Nucleosynthesis: Concordance of Theory and Observations
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Date: 03/06/2008 - 11:15 am
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Direct Dark Matter Searches
Abstract: Astrophysical evidence indicates that the universe consists to about 25% of non-baryonic, cold Dark Matter, compared to merely ~4% of 'regular' matter, composed of quarks and electrons. The existence of Dark Matter and Dark Energy is striking evidence for physics beyond the Standard Model, and under...
read moreDate: 03/06/2008 - 11:50 am
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Conformal Collider Physics
Abstract: We study observables in a conformal field theory which are very closely related to the ones used to describe hadronic events at colliders. We focus on the correlation functions of the energies deposited on calorimeters placed at a large distance from the collision. We consider initial states produc...
read moreDate: 03/06/2008 - 12:25 pm
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dS Minimum without anti-D3 branes and Large Volume Axionic Swiss-Cheese Inflation
Speaker(s):
Aalok Misra - Indian Institute of Technology
Abstract: We first discuss the possibility of getting a non-supersymmetric dS minimum with the inclusion of perturbative and non-perturbative alpha' corrections and instanton contributions in the large volume limit of certain Swiss Cheese Calabi Yau orientifold type IIB compactifications. We then discuss axio...
read moreDate: 03/06/2008 - 2:30 pm
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Detecting Cosmic Strings in the CMB
Abstract: We further advance the application of the Canny algorithm for detecting cosmic strings in CMB maps.
Date: 03/06/2008 - 2:30 pm
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Low energy QCD and ChPT tests at the NA48/2 experiment
Abstract: In the last years, the NA48/2 experiment at the CERN SPS has recorded an unprecedented sample of charged kaon decays. From this, we report very precise measurements of fundamental parameters of Chiral Perturbation Theory (ChPT) and the study of low energy pi-pi scattering. Several rare and very rar...
read moreDate: 03/06/2008 - 2:30 pm
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BPS preons and M-theory
Abstract: 'BPS preons were conjectured (PRL 86, 4451 (2001), hep-th/0101113) as the basic constituents of M-theory; they are states preserving 31/32 supersymmetries. We discuss the absence of preonic solutions in D=10,11 supergravities and its possible implications. The AdS generalization of the BPS preons, t...
read moreDate: 03/06/2008 - 2:45 pm
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Ultralight Gravitino at the LHC
Abstract: In supersymmetric (SUSY) models with the gravitino being the lightest SUSY particle (LSP), the SUSY breaking scale (i.e., the gravitino mass) could be determined by measuring the lifetime of the next-to-lightest SUSY particle (NLSP). However, for an ultralight gravitino of mass of O(1) eV, which is ...
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Non-Gaussianities in extended D-term inflation
Abstract: I will present extensions of hybrid inflationary models in the context of supersymmetric D-term in- flation. I will show that there exists a large domain of parameters in which significant primordial non-Gaussianities can be produced while preserving a scale free power spectrum for the metric fluctu...
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Non-minimal Universal Extra Dimensions
Abstract: We study the effects of boundary terms in models with a flat 'Universal'' Extra Dimension in which all Standard Model fields propagate in the bulk. We show how non-minimal boundary terms change the mass spectrum and interactions of Kaluza-Klein modes, allow for new dark matter candidates from UED, a...
read moreDate: 03/06/2008 - 3:00 pm
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Nonlocal Inflation from String Theory
Abstract: Many string theorists and cosmologists have recently turned their attention to building and testing string theory models of inflation. One of the main goals is to find novel features that could distinguish stringy models from their field theoretic counterparts. This is difficult because, in most ex...
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Constraining the inflationary action with cosmological observations
Abstract: If inflation is to be considered in an unbiased way, as possibly originating from one of a wide range of underlying theories,then observations need not be simply applied to reconstructing the inflaton potential, V(phi), or a specific kinetic term, as in DBI inflation, but rather to reconstruct the i...
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Virtual extra dimensions from unparticle fields
Abstract: The phenomenology of TeV-scale physics can be modified by the existence of scale-invariant 'unparticle' fields that can couple to the standard model sector. In particular, it has been shown that unparticles can alter gravitational interactions in a similar fashion to extra dimensions. Observable res...
read moreDate: 03/06/2008 - 3:15 pm
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Gravitational Radiation from Preheating
Abstract: Parametric resonance, also known as preheating, is a plausible mechanism for bringing about the transition between the inflationary phase and a hot, radiation dominated universe. This epoch results in the rapid production of heavy particles far from thermal equilibrium and has the potential to sourc...
read moreDate: 03/06/2008 - 3:15 pm
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Sequestering in models of F-term uplifting
Speaker(s):
Hiroyuki Abe - Yukawa Institute of Theoretical Physics
Abstract: We show the nature of sequestering hidden sector in five-dimensional supergravity models, where a negative vacuum energy of the nonperturbative modulus potential is canceled by a dynamically generated F-term in the hidden sector. Soft supersymmetry breaking terms are explicitly shown in the case tha...
read moreDate: 03/06/2008 - 3:15 pm
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Backreaction in Closed String Tachyon Condensation
Abstract: Working in the weak tachyon region of a condensing tachyon background, we find the modified equations of motion for massless strings with conformal perturbation theory. We then estimate the backreaction on the background dilaton. In large (supercritical) dimensions, we find that the backreaction can...
read moreDate: 03/06/2008 - 3:30 pm
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Resonant scattering and recombination of pseudo-degenerate WIMPs
Speaker(s):
Adam Ritz - University of Victoria
Abstract: WIMP dark matter candidates chi^0 have interesting signatures for direct and indirect detection in regimes where there is a near degeneracy with a heavier charged state chi^{pm}, as occurs for example along the boundary of the coannihilation strip in the CMSSM. For small splittings of O(10) MeV, the...
read moreDate: 03/06/2008 - 3:30 pm
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Inflation scenario via the Standard Model Higgs boson and LHC
Abstract: We discuss a quantum corrected inflation scenario driven by a generic GUT or Standard Model type particle model, whose scalar field playing the role of an inflaton has a strong non-minimal curvature coupling. We show that currently widely accepted bounds on the Higgs mass falsify the suggestion of [...
read moreDate: 03/06/2008 - 4:45 pm
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Irreducible flavour and CP violation in SUGRA flavour models
Abstract: In SUGRA flavour models, a total sequestering is not possible and an irreducible amount of flavour and CP violation is essentially unavoidable, which renders many flavour models testable in the near future experiments.
Date: 03/06/2008 - 4:45 pm
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Conformal Gravity Challenges String Theory
Abstract: The cosmological constant problem and the compatibility of gravity with quantum mechanics are the two most pressing problems in all of gravitational theory. While string theory nicely addresses the latter, it has so far failed to provide any compelling solution to the former. On the other hand, whil...
read moreDate: 03/06/2008 - 4:45 pm
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Neutrino sector impacts SUSY dark matter
Abstract: We study effects of the neutrino yukawa coupling on neutralino dark matter observables. We found that presence of the top-like neutrino yukawa coupling does significantly affect neutralino relic density in the regions.
Date: 03/06/2008 - 5:00 pm
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Gravitational Aether as a solution to the cosmological constant problem
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Date: 03/06/2008 - 5:00 pm
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Monodromy in the CMB: Gravity Waves and String Inflation
Abstract: We present a simple mechanism for obtaining large-field inflation, and hence a gravitational wave signature, from string theory compactified on twisted tori. For Nil manifolds, we obtain a leading inflationary potential proportional to phi^(2/3) in terms of the canonically normalized field phi, yiel...
read moreDate: 03/06/2008 - 5:00 pm
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A Born-Infeld action for dark matter and dark energy
Abstract: We consider a Born-Infeld like action for gravity coupled to an external connection field. We show that the equation of state of this fluid interpolates between dark matter and dark energy. We also show that on galactic scales this system predicts asymptotically flat rotation curves. This action is...
read moreDate: 03/06/2008 - 5:15 pm
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LHC Signals of MSSM Electroweak Baryogenesis
Abstract: The Standard Model (SM) of particle physics provides an excellent description of nearly every collider physics experiment performed to date. However, the SM is unable to explain the observed cosmology. Among its cosmological shortcomings, the SM cannot account for the dark matter or explain why ther...
read moreDate: 03/06/2008 - 5:15 pm
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Reheating in warped throats: helping relics decay
Abstract: The process of reheating in warped brane world models was initially thought to be quite efficient. However, the identification of long-lived Kaluza-Klein (KK) relics associated with isometries along the internal directions suggests that reheating may not be efficient, and may conflict with BBN and b...
read moreDate: 03/06/2008 - 5:30 pm
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GUTs and Exceptional Branes in F-theory
Abstract: Within the context of F-theory compactified on Calabi-Yau fourfolds, we describe a class of string theory vacua which contain several features necessary in supersymmetric grand unified models of particle physics. Focussing on a simple class of local Calabi-Yau fourfolds, we explain how the matter co...
read moreDate: 03/06/2008 - 5:30 pm
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Non-Gaussianity from preheating
Abstract: If light scalar fields are present at the end of inflation, their nonequilibrium dynamics can produce non-Gaussian density perturbations. Lattice field theory simulations show that this effect can be very strong in the massless preheating model. It is therefore an important factor in assessing the v...
read moreDate: 03/06/2008 - 5:30 pm
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Lattice Chirality and the Decoupling of Mirror Fermions
Abstract: With LHC commissioned in just a few month ahead, all sorts of ideas about physics beyond the standard model are being explored intensively. A strong-coupling chiral theory appearing at TeV scale remains a possibility but also a very hard scenario to study. When it comes to strongly coupled theories,...
read moreDate: 03/06/2008 - 5:45 pm
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Vector Inflation
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Date: 03/06/2008 - 5:45 pm
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Local Group Dwarfs and the Cold Dark Matter Paradigm
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Date: 03/06/2008 - 5:45 pm
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Quark Gluon Plasma at RHIC (and in QCD and String Theory)
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Date: 04/06/2008 - 9:00 am
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Quark Gluon Plasma in QCD, at RHIC, and in String Theory
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Date: 04/06/2008 - 9:35 am
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Prospects for Detecting Primordial B-modes from Sub-Orbital Experiments
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Date: 04/06/2008 - 10:10 am
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Three Years of Cosmology with SNLS
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Date: 04/06/2008 - 11:15 am
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Probing Fundamental Physics and the Early Universe by Detecting Gravitational Waves
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Date: 04/06/2008 - 11:50 am
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Measures of the multiverse
Abstract: Inflation is generically a never ending process, with new 'pocket universes' constantly being formed. All possible events will happen an infinite number of times in such an eternally inflating universe. Unless we learn how to compare these infinities, we will not be able to make any predictions at a...
read moreDate: 05/06/2008 - 9:00 am
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From Strings to the MSSM
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Date: 05/06/2008 - 9:35 am
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Physics at the Tevatron
Abstract: The Fermilab Tevatron is currently the highest energy particle collider in the world and is host of the CDF and DZero experiments. Measurements performed by these two international collaborations have significantly improved our knowledge of subatomic physics and helped further constrain different sc...
read moreDate: 05/06/2008 - 10:10 am
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The Planck Satellite
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Date: 05/06/2008 - 11:15 am
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Multiple Probes of Dark Energy
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Date: 05/06/2008 - 11:50 am
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Gauge mediation of SUSY breaking
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Date: 05/06/2008 - 12:25 pm
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Variation of fundamental constants from Big Bang to atomic clocks: theory and observations
Abstract: Theories unifying gravity with other interactions suggest temporal and spatial variation of the fundamental 'constants' in expanding Universe. The spatial variation can explain fine tuning of the fundamental constants which allows humans (and any life) to appear. We appeared in the area of the Unive...
read moreDate: 05/06/2008 - 1:00 pm
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New attractors in SU(3)xSU(3) structure compactifications
Abstract: It was proposed recently that type IIB orientifold compactifications on CY(3) in the presence of fluxes exhibit an attractor mechanism similar to the one in black hole physics, in other words that minimizing the relevant scalar potential is equivalent to solving a system of attractor equations. So f...
read moreDate: 05/06/2008 - 2:45 pm
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Features in the CMB
Abstract: We briefly discuss the potential cosmological implications of our results.
Date: 05/06/2008 - 2:45 pm
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High Q^2 physics at HERA
Abstract: Proton structure measurements at high $Q^{2}$ performed by the H1 and ZEUS collaborations at the HERA collider, are reviewed. Neutral and charged current deep inelastic scattering cross sections and structure functions are presented. The review also discusses improvements to the parton density measu...
read moreDate: 05/06/2008 - 2:45 pm
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LARGE Volume Scenarios and String Loops
Abstract: We study the necessary and sufficient topological conditions for general Calabi-Yaus to get a non-supersymmetric AdS exponentially large volume minimum of the scalar potential in flux compactifications of IIB string theory. It turns out that string loop corrections play a crucial role to realise exp...
read moreDate: 05/06/2008 - 3:00 pm
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Cosmic Rays Through the Higgs Portal
Abstract: An electroweak singlet coupling through the Higgs portal has a natural mass scale $m_Ssim m_h$. In this mass range its annihilation cross section is dominated by proximity to the $W$, $Z$ and Higgs peaks. Analysis of the $gamma$ ray signal from electroweak singlet annihilation in the mass range $80,...
read moreDate: 05/06/2008 - 3:00 pm
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CMB Cosmic String B-Modes
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Date: 05/06/2008 - 3:00 pm
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Moduli stabilization and flavor structure in 5D SUGRA with multi moduli
Abstract: Moduli stabilization, SUSY breaking and flavor structure are discussed in 5D gauged supergravity models with two vector-multiplet moduli fields. One modulus field makes the fermion mass hierarchy while the other is relevant to the SUSY breaking mediation. We analyse the potential for the moduli from...
read moreDate: 05/06/2008 - 3:15 pm
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Cosmology from CFHTLS-Wide Weak Lensing on Large Scales
Abstract: I will discuss recent results from the Cosmic Shear component of the CFHT Legacy Survey. These results reach very large scales, allowing a measurement of poper spectrum of matter fluctuations in the linear regime, and of cosmological parameters.
Date: 05/06/2008 - 3:15 pm
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