ITINENARY

• Arriving at Cairns Airport
  
  
• Making your way to Port Douglas:
         - by car,
         - picked up by the Sea Temple Resort transfer for AU$30 per person, one way,
         - by airport shuttle bus from Cairns airport to Port Douglas's major hotels for AU$32 or more per person, one way.
  
  
• Check into the Sea Temple Resort and receive your workshop pack.
  
  
• Sunday the 27th of July Workshop Reception between 18:00-20:00 at the Poolside Lagoon Bar (drinks and light finger food).
  
  
• Monday the 28th of July Workshop commences at 8.50am in the Temple I & II room .
  
  
• Wednesday the 30th of July is a half free day after 12:00pm.
  
  
• Thursday the 31st of July Workshop Dinner at 19:30 in the Lagoon View Terrace .
  
  
• Friday the 1st of August workshop ends at 17.45.

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VENUES in PORT DOUGLAS:

• All full buffet breakfasts are served at the Sea Temple Resort Restaurant, the cost is AU$25 per person.
  
  
• All morning and afternoon teas/coffees will be served in the foyer of the conference rooms.
  
  
• All lunches are served at the Sea Temple Resort Restaurant. Lunch is included for all partcipants.
  
  
• All talks will be held in the Temple I & II room .
  
  
• The working area will be available in the Temple II room with a round table and white board.
  
  
• The wireless internet facilities are available throughout the resort, the cost is AU$30 per day.
  
  

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SCIENTIFIC PROGRAM:

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Navigation:  Click the arrows or titles to see talk abstracts.
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SUNDAY 27th July

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MONDAY 28th July

Time:	Speaker/Title/Abstract
8:50-9:00	Welcome Opening by Ayse Kizilersu
	Session Chair: Michael Pennington
9:00-9:45	Reinhard ALKOFER     "Landau gauge QCD Green functions." In a functional approach to QCD the infrared behaviour of Landau gauge Green functions is investigated. Positivity violation for, and thus confinement of, gluons is demonstrated, and the analytic structure of the gluon propagator is studied. Quark confinement is related to an infrared divergence of the quark-gluon vertex. In the latter various components are non-vanishing due to the dynamical breaking of  chiral symmetry. As a result an infrared finite running coupling in the Yang-Mills sector is derived whereas the running coupling related to the quark-gluon vertex is infrared divergent and therefore implies quark confinement. [ + Close view ]
9:45-10:30	Atsushi NAKAMURA     "Quarks and Gluons in Confinement and Deconfinement Phases." Quark propagators and gluon propagators are studied by lattice QCD in the confinement and deconfinement phases, i.e., below and above Tc. [ + Close view ]
10:30-11:00	Morning Tea
	Session Chair: Peter Tandy
11:00-11:30	J. Timothy LONDERGAN     "Effects of Regge Exchange on Hard Exclusive Processes." There has been much interest recently in hard exclusive processes, such as Deeply Virtual Compton Scattering and exclusive meson production. Under certain conditions, a QCD factorization theorem has been proved for such processes.This allows the processes to be described as the product of a hard amplitude which can be calculated from QCD, times a universal soft amplitude that exhibits scaling behavior.Such amplitudes have been analyzed in terms of integrals over Generalized Parton Distributions. We have studied the consequences that occur when the scattering amplitudes exhibit Regge behavior. We will show that this has several important consequences for hard exclusive processes, including the breakdown of factorization, and a Q^2 dependence of hard exclusive amplitudes that will differ from that predicted using factorization arguments. We will discuss how this arises, and will make predictions that can be tested in the analysis of hard exclusive reactions. There has been much interest recently in hard exclusive processes, such as Deeply Virtual Compton Scattering and exclusive meson production. Under certain conditions, a QCD factorization theorem has been proved for such processes.This allows the processes to be described as the product of a hard amplitude which can be calculated from QCD, times a universal soft amplitude that exhibits scaling behavior.Such amplitudes have been analyzed in terms of integrals over Generalized Parton Distributions. We have studied the consequences that occur when the scattering amplitudes exhibit Regge behavior. We will show that this has several important consequences for hard exclusive processes, including the breakdown of factorization, and a Q^2 dependence of hard exclusive amplitudes that will differ from that predicted using factorization arguments. We will discuss how this arises, and will make predictions that can be tested in the analysis of hard exclusive reactions. [ + Close view ]
11:30-12:00	Ross YOUNG     "Strange quark contributions to nucleon form factors." We present our theoretical determination of the strange quark component of the electromagnetic form factors of the nucleon. This work is based upon lattice-QCD simulations and advanced chiral extrapolation techniques, supplemented with experimental form factors and charge symmetry constraints. The results of this theoretical prediction are compared with the latest experimental results on strangeness, as seen in parity-violating electron--nucleon scattering. [ + Close view ]
12:00-12:30	Anthony WILLIAMS     "A fitting robot for variational analysis." We develop a robot algorithm to maximise the number of distinct states reliably extracted from correlator data using the variational analysis method. The robot attempts to remove, as far as possible, the human element from both the choice of parameters for the variational analysis and the fitting of the subsequent orthogonalised data. [ + Close view ]
12:30-13:30	Lunch
13:30-15:30	Informal Discussions/Free
15:30-16:00	Afternoon Tea
	Session Chair: Shigemi Ohta
16:00-16:30	Leonid GLOZMAN     "Confining but chirally symmetric phase at finite density." We discuss a possibility that above the chiral restoration phase transition at finite density and small temperature QCD is in a confining phase. Contrary to the deconfined quark matter the elementary excitations in such a matter are confined but chirally symmetric hadrons. [ + Close view ]
16:30-17:00	Takuya KANAZAWA     "Center vortices and Bloch walls." We extend the Tomboulis-Yaffe inequality, proved for SU(2) LGT, to SU(N) LGT with general N and also to general spin systems. Physical implication and possible further extension will be discussed. [ + Close view ]
17:00-17:30	Peter MORAN     "Sifting the sand of the QCD vacuum." Using the techniques of Lattice QCD we are probing various aspects of dynamical QCD vacuum structure. We begin by comparing the gluonic and fermionic topological charge densities revealed with the Overlap-Dirac operator and over-improved stout-link smearing. We demonstrate how different UV cutoffs in the fermionic operator correspond to greater levels of smearing. Of particular interest is the strong correlation between the local chirality of low-lying Dirac eigenmodes and topological charge distributions. Following this, we analyse the effects of dynamical quarks on the structure of the vacuum at both short and long distance scales, and illustrate how these extra degrees of freedom permit greater field fluctuations. Finally, we probe the extent to which instanton-like effects can be found in the short-range, sand-like structure of the unfiltered topological charge density, which is characterised by the negative < q(x) q(0) > correlator. [ + Close view ]

Go to: | Sunday | Monday | Tuesday | Wednesday | Thursday | Friday |

TUESDAY 29th July

Time:	Speaker/Title/Abstract
	Session Chair: Adam Szczepaniak
9:00-9:45	Tony THOMAS     "The Distribution of the Proton Spin on its Quarks and Gluons." We review the resolution of the famous proton spin crisis proposed recently by Myhrer and Thomas. The relationship to recent studies in lattice QCD will be explored as will the importance of experiments on the Generalized Parton Distributions, especially at JLab at 12 GeV. [ + Close view ]
9:45-10:30	Christian FISCHER     "Aspects of confinement and dynamical chiral symmetry breaking." I review recent results on the relation of QCD Green's functions with confinement and dynamical chiral symmetry breaking and discuss consequences for the spectrum of light mesons. [ + Close view ]
10:30-11:00	Morning Tea
	Session Chair: Tony Thomas
11:00-11:30	Peter TANDY     "Non-perturbative QCD Modeling and Meson Physics." An account will be given of recent results and issues arising from QCD modeling embedded in the ladder-rainbow truncation of the Dyson-Schwinger equations of QCD. The emphasis will be upon mesons, and topics will include dynamical chiral symmetry breaking, light flavor mixing, and extensions to heavy quark mesons. [ + Close view ]
11:30-12:00	Gastao KREIN     "Quark model description of low-energy scattering of D-mesons on nucleons." We employ a constituent quark model to investigate the scattering of D-mesons on nucleons at low energies. The model is also used to investigate the effect of SU(4) symmetry breaking on effective coupling constants of DDrho and DDomega vertices and form factors. These couplings play a very important role in an effective Lagrangian description of the interaction. We also discuss the possibility to extract information on the interaction from antiproton annihilation on the deuteron through the rescattering of the produced D mesons on the spectator nucleon. Experiments of this kind are being planned to be undertaken by the PANDA experiment at the FAIR facility at the GSI laboratory in Germany. [ + Close view ]
12:00-12:30	Lorenz von SMEKAL     "Landau Gauge QCD in the Continuum and on the Lattice." The infrared behaviour of QCD Green's functions in Landau gauge has been focus of intense study. Different non-perturbative approaches all lead to the same prediction. These include Dyson-Schwinger Equations, Functional Renormalisation Group Equations and Stochastic Quantisation. The predicted behaviour is a consequence of a celebrated criterion by Kugo and Ojima which expresses the conditions for confinement in local quantum field theory. Early lattice studies of the gluon and ghost propagators supported these predictions qualitatively well. Detailed comparisons and studies of finite-volume effects have recently revealed small but significant differences, however. In particular, the Kugo-Ojima criterion seems now violated in the infinite-volume limit. But aren't we comparing apples with oranges when contrasting lattice Landau gauge simulations with continuum results? The answer is yes, and we need to change that. We therefore propose a reformulation of Landau gauge on the lattice which will allow us to perform gauge-fixed Monte-Carlo simulations matching the continuum methods which will thereby be elevated to a truly non-perturbative level at the same time. [ + Close view ]
12:30-13:30	Lunch
13:30-15:30	Informal Discussions/Free
15:30-16:00	Afternoon Tea
	Session Chair: Tsuneo Suzuki
16:00-16:30	Pierre van-BAAL     "Calorons with non-trivial holonomy." We will give a review of Calorons with non-trivial holonomy, including Fermion zero-modes. [ + Close view ]
16:30-17:00	Kai SCHWENZER     "Infrared fixed points of QCD." We analyze the infrared fixed point structure of Landau gauge QCD and discuss the importance of these fixed points for physical phenomena like the confinement of quarks and chiral symmetry breaking. We find that in addition to the uniform scaling limit when all momenta tend to zero the vertices feature also kinematic singularities when only a single gluon momentum vanishes. In the case of the quark-gluon vertex these soft singularities are non-perturbatively enhanced and provide a mechanism for the confinement of static color sources in quenched QCD. The obtained fixed points are only realized in the idealized situations of heavy respectively massless quarks. Since the unquenched, physical case depends on the current quark mass scales and is in between these limiting cases, this provides the chance to describe string breaking and hadronization. [ + Close view ]
17:00-17:30	Jonathan CARROLL     "Modelling Hybrid Stars with the Octet QMC Model." The Quark-Meson-Coupling (QMC) model has been recently improved via the self-consistent inclusion of a scalar polarizability. Using this model, we are investigating the possibility of a phase transition from hadronic matter (octet baryons described by the improved QMC model) to deconfined three-flavor quark matter via a Glendenning-style mixed phase satisfying equilibrium conditions imposed by statistical mechanics. Considering several scenarios for incorporating dynamical chiral-symmetry breaking, I will present results applicable to both infinite matter and neutron stars. [ + Close view ]

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WEDNESDAY 30th July

Time:	Speaker/Title/Abstract
	Session Chair: Gastao Krein
9:00-9:45	Terry TOMBOULIS     "The QGP rapid thermalization puzzle - How do we simulate out-of-equilibrium dynamics?" The success of the hydrodynamical description of its evolution indicates that the quark-gluon plasma generated in heavy ion collisions thermalizes very rapidly. Elucidating the underlying thermalization mechanism in the strongly coupled plasma presents a major challenge to our understanding of gauge theory dynamics. We first briefly review the inadequacy of explanations based on high temperature perturbative treatments or other effective parton descriptions. A non-perturbative formulation from first principles amounts to addressing the problem of time-dependent out-of-equilibrium computation in (gauge) field theory. We describe the approach of replacing real-time dynamics by Glauber dynamics on the lattice, and corresponding simulations in pure SU(3) gauge theory which mimic conditions encountered in heavy ion collisions. The picture of two distinct time scales in the plasma evolution seen in these simulations agrees quite well with the hydrodynamical description of what is seen experimentally. The dynamical mechanism involved is the rapid excitation and subsequent decay of long range modes akin to spinodal decomposition. We then discuss real-time formalism, the Schwinger-Keldysh formulation and its well-known perturbative expansion. We propose a non-perturbative implementation on the lattice and its application to the deconfinement transition dynamics problem. [ + Close view ]
9:45-10:30	Tsuneo SUZUKI     "Gauge-independent Abelian mechanism of color confinement." Abelian mechanism of non-Abelian color confinement is observed in a gauge-independent way by high precision lattice Monte Carlo simulations in gluodynamics. An Abelian gauge field is extracted with no gauge-fixing. The Hodge decomposition of the Abelian Polyakov loop correlator to the regular photon and the singular monopole parts reveals that only the monopole part is responsible for the string tension. The investigation of the flux-tube profile then shows that Abelian electric fields defined in an arbitrary color direction are squeezed by monopole supercurrents with the same color direction, and the quantitative features of flux squeezing are consistent with those observed previously after Abelian projections with gauge fixing. Gauge independence of Abelian and monopole dominance strongly supports that the mechanism of non-Abelian color confinement is due to the Abelian dual Meissner effect. [ + Close view ]
10:30-11:00	Morning Tea
	Session Chair: Tom Cohen
11:00-11:30	Adam SZCZEPANIAK     "From gluons to hybrids: Adventures in the Coulomb Gauge." Aspects of gluon confinement and hadron spectrum will be discussed. [ + Close view ]
11:30-12:15	Johann RAFELSKI     "Strong Fields and Vacuum Structure: a Century XXI remake." The advent of femto and even atto-second pulse lasers with up to 10kJ pulse energy opens up a new area of vacuum study to active research. Strong EM fields are formed which materialize by pair production. Field induced vacuum condensate and effective particle masses arise. Connection between strong and electromagnetic vacuum structure is of considerable theoretical interest. Hot MeV QED plasma can be formed. There is expectation that focusing of energy can be further increased bridging the gab to nuclear and quark hot matter. [ + Close view ]
12:15-12:45	Lunch
12:45-	Free Afternoon

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THURSDAY 31st July

Time:	Speaker/Title/Abstract
	Session Chair: Reinhard Alkofer
9:00-9:45	Shigemi OHTA     "Breakdown of the operator product expansion in the 't Hooft model." We consider deep inelastic scattering in the 't Hooft model. Being solvable, this model allows us to directly compute the moments associated to the cross section at next-to-leading order in the 1/Q2 expansion. We perform the same computation using the operator product expansion. We find that all the terms match in both computations except for one in the hadronic side, which is proportional to a non-local operator. The basics of the result suggest that a similar phenomenon may occur in four dimensions in the large N_c limit. [ + Close view ]
9:45-10:30	Jan PAWLOWSKI     "Confinement, chiral symmetry breaking and the QCD phase diagram." I report on recent progress on QCD at zero and finite temperature and chemical potential with functional methods. At zero temperature I discuss results on the ghost and gluon propagators in Landau gauge in agreement with the Kugo-Ojima/Gribov-Zwanziger scenario of confinement. The relation to lattice data is analysed. At finite temperature I present results on the order parameter for quark confinement, the Polyakov loop, computed from the propagators in Landau gauge. This is compared to a computation in Polyakov gauge. The results on the critical temperature of the confinement-deconfinement phase-transition quantitatively agree with lattice predictions. The importance of these findings for an analysis of the QCD phase diagram, and in particular to QCD at finite chemical potential, as well as first qualitative results are surveyed. [ + Close view ]
10:30-11:00	Morning Tea
	Session Chair: Johann Rafelski
11:00-11:30	Orlando OLIVEIRA     "Landau Gauge Gluon Functions from Lattice QCD." We will discuss the infrared properties of the infinite volume Landau gauge 2-point and 3-point gluon functions from lattice QCD. [ + Close view ]
11:30-12:00	Ian CLOET     "Nucleon, nucleon-delta transition form factors in covariant theories." Baryon form factors represent a tremendous challenge for QCD inspired models. At small Q^2 pion dynamics plays a critical role, while at large Q^2 perturbative QCD makes firm predictions. We will discuss two approaches, a Dyson-Schwinger Equation "quark-core" calculation that should be reliable at large Q^2, and an NJL calculation that includes pion cloud effects. In the later approach we will also discuss the nucleon-delta transition form factors and finite density effects. [ + Close view ]
12:00-12:30	Derek LEINWEBER     "Electromagnetic structure of hadrons." This talk will highlight recent advances in understanding the electromagnetic structure of hadrons through the synergy of Lattice QCD and chiral effective field theory. Of particular interest are new results for the E2 form factors of vector mesons and decuplet baryons. [ + Close view ]
12:30-13:30	Lunch
13:30-15:30	Informal Discussions/Free
15:30-16:00	Afternoon Tea
	Session Chair: Terry Tomboulis
16:00-16:30	Michael MÜELLER-PREUSSKER     "Coulomb gauge gluon and ghost propagators on the lattice." In this talk we are going to present results of recent computations of the gluon and ghost propagators as well as of the effective Coulomb potential for pure SU(3) Yang-Mills theory on the lattice within the Coulomb gauge. We shall pay special attention to the scaling properties and the influence of Gribov copies. [ + Close view ]
16:30-17:00	Ahmed BAKRY     "Gluon Flux Distribution in Baryons at Finite Temperature." We are investigating the distribution of the gluon action density in baryonic systems. The color field distribution is calculated by constructing a Baryon on the lattice using three Polyakov loops as a 3-quark source operator. The simulations are performed in SU(3) gauge field theory for a variety of lattice sizes and temperatures. A gauge-independent high statistics approach which exploits the lattice translational symmetry is employed. We compare our results with recent results obtained using the 3-quark Wilson loop as source operator. At short distance separations between the quarks, our calculations display an action-density profile with a rounded filled-triangular shape, similar to that observed in the Wilson-loop results. However, we find this shape persists at larger inter-quark separations (up to 1 fm). This contrasts the Wilson-loop results, where a Y-shaped gluonic flux distribution is observed. Our gluon-flux profile suggests that the triangular-shaped node observed at the Y-shaped flux-tube junction in the Wilson-loop case, grows under the evolution of Euclidean time. [ + Close view ]
17:00-17:30	Fu-Guang CAO     "Flavour asymmetry and quark-antiquark asymmetry of the nucleon sea." Non-perturbative processes involving the meson cloud of the nucleon may break various symmetries of the nucleon sea which are generally assumed under the consideration of perturbative QCD. We report theoretical calculations of flavour asymmetry and strange-antistrange asymmetry of the nucleon sea using phenomenological models. [ + Close view ]
19:30-	Workshop Dinner

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FRIDAY 1st August

Time:	Speaker/Title/Abstract
	Session Chair: Atsushi Nakamura
9:45-10:30	Tom COHEN     "The Chiral Condensate and Holographic Models of QCD." Holographic models of QCD are motivated from the famed AdS/CFT conjecture of Maldencena. They model the four dimensional quantum theory of QCD as a five-dimensional classical theory. These models have had some phenomenological successes. However, they also face fundamental challenges from both a theoretical and phenomenological perspective. This talk will focus on the chiral condensate as in illustration of some of the issues facing this approach. [ + Close view ]
10:30-11:00	Morning Tea
	Session Chair: Leonid Glozman
11:00-11:30	Ayse KIZILERSU     "Unquenched QED under the Microscope." Non-perturbative studies of QED/QCD are fundamental to understand fascinating concepts in quantum field theories such as dynamical chiral symmetry breaking, confinement and U(1) problem. The key players in these studies are propagators (2-point Green's functions) and vertices (3-point Green's functions). The aim of this talk is to give an overview and an update of the latest development of these objects and discuss new advances in the field. The Schwinger-Dyson equations are used in these calculations as a non-perturbative method. [ + Close view ]
11:30-12:00	Antonio PINEDA     "Breakdown of the operator product expansion in the 't Hooft model." We consider deep inelastic scattering in the 't Hooft model. Being solvable, this model allows us to directly compute the moments associated to the cross section at next-to-leading order in the 1/Q2 expansion. We perform the same computation using the operator product expansion. We find that all the terms match in both computations except for one in the hadronic side, which is proportional to a non-local operator. The basics of the result suggest that a similar phenomenon may occur in four dimensions in the large N_c limit. [ + Close view ]
12:00-12:30	Adnan BASHIR     "Confinement, Dynamical Mass Generation and the Fermion-Boson Vertex." TBA [ + Close view ]
12:30-13:30	Lunch
13:30-15:30	Informal Discussions/Free
15:30-16:00	Afternoon Tea
	Session Chair: Orlando Oliveira
16:00-16:30	Jose PALAEZ     "Light Scalar meson nature form the Nc and quark mass dependence." Using chiral perturbation theory unitarized with dispersive techniques, we can study the nature of the light scalar mesons. From one and two loop chiral perturbation theory the Nc dependence of their mass and width is shown to be at odds with an ordinary quark-antiquark dominant component. In addition we study, using dispersion relations and one-loop Chiral Perturbation Theory, the scalar meson dependence on the quark masses, providing a chiral extrapolation to match lattice calculations. [ + Close view ]
16:30-17:00	Andre STERNBECK     "Four-loop alpha_s in a minimal MOM scheme." We introduce a minimal momentum subtraction scheme (MiniMOM) for QCD in Landau gauge which, apart from the usual renormalization conditions for the propagators, requires the renormalization constants of the ghost-gluon vertex to equal unity. This allows us to develop the beta function of the associated running coupling up to four-loop order. We give perturbative expansions of different phenomenologically-interesting observables in terms of this MiniMOM coupling, and compare them to corresponding expansions in the ever popular MSbar scheme. In taking advantage of the MiniMOM coupling being defined also in the nonperturbative regime, we perform lattice Monte Carlo simulations to calculate Lambda QCD. An overview on the current status of these simulations is given. [ + Close view ]
17:00-17:15	Closing of the Workshop by Anthony Williams

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SOCIAL PROGRAM:

• Wednesday the 30th of July is a half free day after 12:00
  
  
• There are various things to do and see in Port Douglas and Cairns. Please click here to see some of the suggestions.

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Page Last updated: 16 July 2008 by J. D. Carroll