Conveners
Plenary: Plenary 1
- Antonio Vairo
Plenary: Plenary 2
- David Blaschke (University of Wroclaw)
Plenary: Plenary 3
- Geoffrey Bodwin (Argonne National Laboratory)
Plenary: Plenary 4
- Antonio Pich (Unknown)
Plenary: Plenary 5
- Wolfgang Lucha (Austrian Academy of Sciences)
Plenary: Plenary 6
- There are no conveners in this block
Plenary: Plenary 7
- Hideo Suganuma (Kyoto University)
Plenary: Plenary 8
- Michael Creutz (Brookhaven Lab)
Plenary: Plenary 9
- Guido Martinelli (Sapienza Universita e INFN, Roma I (IT))
Plenary: Plenary 10
- Joan Soto (Universitat de Barcelona)
Plenary: Plenary 11
- Gastao Krein (UNESP)
Plenary: Plenary 12
- Jon-Ivar Skullerud (National University of Ireland Maynooth)
Connecting experimental measurements, numerical simulations and microscopic theory to form a genuine understanding of nuclear matter in extreme conditions requires robust statistical tools. In this talk I will discuss Bayesian techniques, which allow the practitioner to make explicit her prior knowledge, as well as uncertainty, in a well controlled manner. As examples for application of...
I will discuss the rapid recent progress made in modelling neutron stars in
binary system and show how the inspiral and merger of these systems is more
than a strong source of gravitational waves. Indeed, while the gravitational
signal can provide tight constraints on the equation of state for matter at
nuclear densities, the formation of a black-hole--torus system can explain much
of the...
Striking new phenomena in the charmonium and bottomonium regions have been uncovered in the past few years that likely point to the existence of configurations of quarks and gluons beyond the traditional quark-antiquark picture of mesons and the three-quark picture of baryons. I will review recent progress, highlight outstanding puzzles, and give some indication for how future progress might be made.
Tetraquark properties will be examined in the limit of large
N_c of color in QCD. The qualitative differences between molecular
and compact teraquarks will be outlined. Consequences of
the possible existence of compact tetraquarks will be analyzed and
shown to lead to upper bounds in the N_c-behavior of their decay
widths. Open questions on theoretical grounds, related to the
dynamics of...
I will discuss determination of $\alpha_s$ from the comparison of the lattice results on the static quark anti-quark static energy at short distances to EFT based weak coupling calculations. I addition I will present results on $\alpha_s$ from the moment of quarkonium correlators.
We present predictions for the prompt-neutrino flux arising from the decay of charmed mesons and baryons produced by the interactions of high-energy cosmic rays in the Earth's atmosphere, making use of a QCD approach on the basis of the general-mass variable-flavor-number scheme for the description of charm hadroproduction at NLO, complemented by a consistent set of fragmentation functions. We...
I will review insights into confinement in supersymmetric theories, and discuss some strongly coupled beyond the standard model scenarios.
The strong CP problem of QCD can be solved via the Peccei-Quinn mechanism, which results in not-yet observed particles, called axions. They are natural dark matter candidates. Assuming that all dark matter is axionic, the theory can predict the mass of the axion providing useful hint for experimental searches. I review hier recent theory developments aiming to put such predictions on a solid footing.
In this talk I review some applications of the functional renormalisation group to infrared QCD and asymptotically safe quantum gravity (QG). It is shown that the universal nature of the FRG allows for a surprisingly similar formulation of these two physically very different theories. This allows us to discuss their physics in a rather similar fashion.
In QCD current applications concern the...
We perform various lattice simulations with the energy-momentum tensor in SU(3) Yang-Mills theory. The energy-momentum tensor defined on the basis of the Yang-Mills gradient flow is used in these analyses. We explore the spatial distribution of the stress tensor in quark-anti-quark system and thermodynamic quantities at nonzero temperature, as well as the correlation functions. Extensions of...
I will review anomalous properties of chiral forms of relativistic matter, which attracted a lot of attention recently in the context of heavy-ion physics and in studies of the Early Universe. In part, the recent interest to chiral matter is driven by the intriguing possibility of observing unusual chiral properties that stem directly from quantum anomalies. In addition, the same fundamental...
The Casimir effect is a quantum phenomenon rooted in the fact that vacuum fluctuations of quantum fields are affected by the presence of physical objects and boundaries. As the energy spectrum of vacuum fluctuations depends on distances between (and geometries of) physical bodies, the quantum vacuum exerts a small but experimentally detectable force on neutral objects. Usually, the associated...
Quantum information theoretic concepts such as entanglement entropy provide interesting information on QCD dynamics. I will discuss in particular the role of entanglement in the context of particle production from the Schwinger mechanism for an expanding QCD string. In the bosonized Schwinger model of QED confined to 1+1 dimensions, entanglement between rapidity regions leads actually to a...
Recent measurements from the ATLAS, CMS and LHCb collaborations are testing QCD
with unprecedented precision and in a new energy regime.
This talk covers recent measurements by the LHC experiments on the production of jets, isolated photons, electroweak bosons and top quarks.
High-precision measurements of flavor-transitions are sensitive to the virtual effects of particles at energies beyond the reach of current colliders. In fact, there are measurements of semileptonic B-meson decays which are in tension with the SM predictions and suggest the existence of new lepton non-universal interactions. I will discuss the phenomenological and theoretical implications of...
Nearly half a century after its formulation, calculating the resonance spectrum of QCD in a reliable way continues to be challenging. These observables are of great interest, in particular because the abundance of exotic or otherwise poorly-understood states, together with new theoretical methods, could provide a real opportunity to unlock a deeper understanding of the strong force. Here...
Production cross sections of heavy quarkonia are considered as useful tools to study various aspects of QCD. Unfortunately, the mechanism of quarkonium production itself remains elusive to this day. Even analyses based on the same formalism can lead to different descriptions of the production process and give contradicting predictions of processes involving heavy quarkonia. In this talk, we...
After recalling the basis of the Dual QCD (DQCD) and its past successes in Kaon flavour physics within the Standard Model, I will present 2018 results that include the calculation of hadronic matrix elements of four-quark operators for $K^0-\bar K^0$ mixing and $K\to\pi\pi$ decays in arbitrary extension of the Standard Model.
The results for $K^0-\bar K^0$ mixing allow an insight into those...
Lattice QCD is currently our only reliable tool for calculating low-energy nuclear physics observables directly from the Standard Model. It is thus a crucial bridge between high-energy beyond the Standard Model (BSM) matrix elements and precision nuclear experiments looking for these rare BSM signals. In this talk, I will discuss recent lattice QCD results relevant for nuclear BSM searches,...
The extraction of the order of the thermal transition of QCD at zero chemical potential, with two dynamical flavours of massless quarks, has proven to be a formidably difficult task. A first order region is found in the chiral limit only on coarse lattices and employing unimproved fermion discretisations, but whether it survives in the continuum limit is yet far from being known.
This...
We propose a model-independent method to ascertain the leading valence composition of a hadron: to measure the energy dependence of its production cross section at a fixed angle interval. This E-dependence, by the QCD Brodsky-Farrar counting rules, falls at high energy with a steepness that depends on the leading quark and gluon composition.
We exemplify with a reaction that could help...
Complex machine learning tools, such as deep neural networks and gradient boosting algorithms, are increasingly being used to construct powerful discriminative features for High Energy Physics analyses. These methods are typically trained with simulated or auxiliary data samples by optimising some classification or regression surrogate objective. The learned feature representations are then...
