The 39th International Symposium on Lattice Field Theory (Lattice 2022)

Session

Plenaries

8 Aug 2022, 09:05

CP1-HSZ/0.010 (CP1-HSZ) - HS2 (CP1-HSZ)

Conveners

Plenaries: Plenaries I

• Phiala Shanahan (MIT)

Plenaries: Plenaries II

• Stefan Kühn

Plenaries: Plenaries III

• Sinya Aoki (Yukawa Institute for Theoretical Physics, Kyoto University)

Plenaries: Plenaries IV

• Rainer Sommer (DESY)

Plenaries: Plenaries V

• Constantia Alexandrou

Plenaries: Plenaries VI

• Sasa Prelovsek (University of Ljubljana)

Plenaries: Plenaries VII

• James Zanotti (University of Adelaide)

Plenaries: Plenaries VIII

• Vera Gülpers (The University of Edinburgh)

Plenaries: Plenaries IX

• Francesco Di Renzo (Università di Parma and INFN)

Plenaries: Plenaries X

• Andreas Kronfeld (Fermilab)

405. QCD thermodynamics: an overview of recent progress

Francesca Cuteri (Goethe University)

08/08/2022, 09:05

QCD at Non-zero Temperature

Plenary

Recent results from lattice simulations of QCD at nonzero temperature and/or density and/or in presence of magnetic fields will be reviewed. Progress in our understanding of the phases and boundaries in the phase diagram, as well as on the calculation of thermodynamic quantities with relevant phenomenological consequences will be discussed.

52. Use of Schwinger-Dyson equation in constructing an approximate trivializing map

Dr Nobuyuki Matsumoto (RIKEN/BNL)

08/08/2022, 09:50

Algorithms (including Machine Learning, Quantum Computing, Tensor Networks)

Plenary

As the precision test of the standard model has become accurate, the need for fine lattices has been increasing. However, as we approach the continuum limit, we get into the critical region of the theory and encounter critical slowing down. Among many studies tackling this problem, we develop the idea of trivializing map, whose use in lattice calculation was proposed by Luscher. With this...

46. Review on Quantum Computing for Lattice Field Theory

Lena Funcke (MIT)

08/08/2022, 11:00

Algorithms (including Machine Learning, Quantum Computing, Tensor Networks)

Plenary

In this talk, we review recent advances in applying quantum computing to lattice field theory. Quantum technology offers the prospect to efficiently simulate sign-problem afflicted regimes in lattice field theory, such as the presence of topological terms, chemical potentials, and out-of-equilibrium dynamics. First proof-of-concept simulations of Abelian and non-Abelian gauge theories in...

50. Modular Supercomputing and its Role in Europe’s Exascale Computing Strategy

Dr Sarah Neuwirth (Goethe-University Frankfurt, Jülich Supercomputing Centre)

08/08/2022, 11:45

Software development and Machines

Plenary

Reaching Exascale compute performance at an affordable budget requires increasingly heterogeneous HPC systems, which combine general purpose processing units (CPUs) with acceleration devices such as graphics processing units (GPUs) or many-core processors. The Modular Supercomputing Architecture (MSA) developed within the EU-funded DEEP project series breaks with traditional HPC system...

58. Topical plenary on emergent geometry and duality in the carbon nucleus

Shihang Shen

09/08/2022, 08:50

Nuclear Physics

Plenary

Title: Structure and geometry of 12C from a Wigner SU(4) symmetric interaction

The carbon-12 nucleus, one of the most crucial elements for life, is full of interesting structures and multifaceted complexity. One famous example is the first excited 0+ state, the so called Hoyle state. It can not be described by most of the ab initio calculations. Moreover, a lack of model-independent...

278. The spectral reconstruction of inclusive rates

John Bulava (DESY Zeuthen)

09/08/2022, 09:20

Hadron Spectroscopy and Interactions

Plenary

A recently re-discovered variant of the Backus-Gilbert algorithm for spectral reconstruction enables the controlled determination of smeared spectral densities from lattice field theory correlation functions. The particular advantage of this model-independent approach is the a priori specification of the kernel with which the underlying spectral density is smeared, allowing for variation of...

61. $B\to D^{(\ast )}\ell \nu$ semileptonic decays at non-zero recoil

Alejandro Vaquero Avilés-Casco (University of Utah)

09/08/2022, 09:50

Weak Decays and Matrix Elements

Plenary

A very rich place to look for phenomena to challenge our current understanding of physics is the flavor sector of the Standard Model (SM). In particular, the $|V_{cb}|$ matrix element of the CKM matrix is the subject of a long standing tension, depending on whether it is determined using inclusive or exclusive methods. On top of that, the SM theoretical calculations of some universality ratios...

49. Heavy flavor physics from lattice QCD

Takashi Kaneko (KEK)

09/08/2022, 11:00

Hadron Structure

Plenary

We review recent progress on heavy flavor physics from lattice QCD.

63. A review on Glueball hunting

Davide Vadacchino (University of Plymouth)

09/08/2022, 11:45

Hadron Spectroscopy and Interactions

Plenary

One of the most direct predictions of QCD is the existence of color-singlet states
called Glueballs, which emerge as a consequence of the gluon field self-interactions.

Despite the outstanding success of QCD as a theory of the strong interaction
and decades of experimental and theoretical efforts, all but the most basic properties of Glueballs are still being debated.

In this talk, I...

51. The Compton amplitude and nucleon structure functions

K. Utku Can (The University of Adelaide)

10/08/2022, 08:50

Hadron Structure

Plenary

The structure of hadrons relevant for deep-inelastic scattering are completely characterised by the Compton amplitude. The standard approach in structure function calculations is to utilise the operator product expansion where one computes the local matrix elements. However, it is well established that tackling anything beyond leading-twist presents additional challenges that are not easily...

402. Neutrino Oscillation and Lattice QCD

Aaron Meyer (University of California, Berkeley)

10/08/2022, 09:20

Hadron Structure

Plenary

Next generation high-precision neutrino scattering experiments have the goal of measuring the as-of-yet unknown parameters governing neutrino oscillation. This effort is hampered by the use of large nuclear targets: secondary interactions within a nucleus can confuse the interpretation of experimental data, leading to ambiguities about the initial neutrino interaction in scattering events. ...

236. Gluon Structure from Lattice QCD

Joseph Karpie

10/08/2022, 09:50

Hadron Structure

Plenary

We review progress on the lattice QCD calculation of parton structure in the nucleon, specifically that of the gluon. The structure of a hadron is typically described by $x$ dependent distributions, most notably the simplest case of the parton distribution function (PDF). Boosted hadronic matrix elements of operators, which are calculable in lattice QCD, can be related to the PDF indirectly....

56. Topical plenary on multi-particle interactions from lattice QCD

Fernando Romero-Lopez (MIT)

10/08/2022, 11:00

Hadron Spectroscopy and Interactions

Plenary

First-principles calculations of multi-hadron dynamics are a crucial goal for lattice QCD calculations. Significant progress has been achieved in developing, implementing and applying theoretical tools that connect finite-volume quantities to their infinite-volume counterparts. In this talk, I will review some recent theoretical developments and numerical results regarding multi-particle...

47. Hadron Spectroscopy and Interactions from Lattice QCD

Dr Liuming Liu (Institute of Modern Physics, Chinese Academy of Sciences)

10/08/2022, 11:30

Hadron Spectroscopy and Interactions

Plenary

I review the recent progresses on lattice calculations of hadron spectroscopy and interactions. The methods to precisely determine the energy eigenstates on lattice and subsequently extract the scattering information have been matured in the last years. After briefly introduce the methodology, I present the new results in the last couple of years, focus will be the results on the exotic...

457. Update on the International Lattice Data Grid

Frithjof Karsch (Universität Bielefeld)

10/08/2022, 12:15

Software development and Machines

Plenary

The International Lattice Data Grid (ILDG) started almost 20 years ago as a global community initiative to enable and coordinate sharing of gauge configurations within the lattice QCD community. We outline the basic ideas of ILDG and explain the urgent need to fully support the meanwhile established FAIR data management practices. We will report on recent activities within the ILDG and on...

312. Emergent strongly coupled ultraviolet fixed point with 8 fundamental flavors

Anna Hasenfratz (University of Colorado Boulder)

12/08/2022, 08:50

Particle physics beyond the Standard Model

Oral Presentation

The emergence of a strongly coupled ultraviolet fixed point as 4-dimensional fermion-gauge systems cross into the conformal window has long been hypothesized. Using an improved lattice actions that include heavy Pauli-Villars (PV) type bosons I show that an SU(3) system with 8 fundamental flavors described by two sets of staggered fermions has a smooth phase transition from the weak coupling...

66. Quantum chaos in supersymmetric Yang-Mills-like model from exact diagonalization

Pavel Buividovich (University of Liverpool)

12/08/2022, 09:20

Theoretical Developments and Applications beyond Particle Physics

Oral Presentation

We use exact diagonalization to study quantum chaos in a simple model with two bosonic and one fermionic degree of freedom. Our model has a structure similar to the BFSS matrix model (compactified supersymmetric Yang-Mills theory), and is known to have a continuous energy spectrum. To diagnose quantum chaos, we consider energy level statistics and the out-of-time-order correlators (OTOCs). We...

452. KWA ceremony and presentation

James Zanotti (University of Adelaide)

12/08/2022, 09:50

Plenary

450. Exotic hadrons from an EFT perspective

Feng-Kun Guo

12/08/2022, 11:10

Hadron Spectroscopy and Interactions

Plenary

The last two decades witness the discovery of tens of hadronic structures beyond the expectations of the traditional quark model. They are candidates of exotic hadrons. Many of these structures are close to the thresholds of a pair of hadrons, and thus allow for an EFT treatment. In this talk, I will give an overview of the understanding of such resonances, covering positive-parity heavy...

454. Probing new horizons with flavour at the LHCb experiment

Vitalii Lisovskyi (TU Dortmund)

12/08/2022, 11:55

Hadron Spectroscopy and Interactions

Plenary

The past decade has seen rapid developments in flavour physics, in particular driven by the LHCb experiment. A wealth of heavy-hadron states have been discovered, with some of them not fitting in the conventional meson-baryon classification scheme. Precision studies of beauty and charm hadron decays have not only improved our understanding of the flavour structure of the Standard Model, but...

53. Asymptotic lattice spacing dependence of spectral quantities in lattice QCD with Wilson or Ginsparg-Wilson quarks

Nikolai Husung (University of Southampton)

13/08/2022, 08:50

Theoretical Developments and Applications beyond Particle Physics

Plenary

One major systematic uncertainty of lattice QCD results is due to the continuum extrapolation to extract the continuum limit at lattice spacing $a\searrow 0$. For an asymptotically free theory like QCD one finds corrections of the form $a^{n_{\min }}[2b_0{\overline{g}}^2(1/a){]}^{{\hat{\mathrm{\Gamma }}}_i}$, where $n_{\min }$ is a positive integer and $\overline{g}(1/a)$ is the running coupling at...

54. Master-field simulations of QCD and the exponential clover action

Patrick Fritzsch (Trinity College Dublin)

13/08/2022, 09:20

Theoretical Developments and Applications beyond Particle Physics

Plenary

Simulating QCD in the traditional way on very large lattices leads to conceptual and technical issues with impact on performance and reliability. In view of master-field simulations, introduced at Lattice 2017, simulations with dynamical fermions are particularly challenging and require additional stabilising measures to reach physical point lattices without compromising the quality of the...

43. Stochastic and Tensor Network simulations of the Hubbard Model

Mr Johann Ostmeyer (University of Liverpool)

13/08/2022, 09:50

Algorithms (including Machine Learning, Quantum Computing, Tensor Networks)

Plenary

The Hubbard model is an important tool to understand the electrical properties of various materials. More specifically, on the honeycomb lattice it is used to describe graphene predicting a quantum phase transition from a semimetal to a Mott insulating state. In this talk I am going to explain two different numerical techniques we employed for simulations of the Hubbard model: The Hybrid Monte...

48. Review on Algorithms for dynamical fermions

Jacob Finkenrath

13/08/2022, 11:00

Algorithms (including Machine Learning, Quantum Computing, Tensor Networks)

Plenary

The talk will review recent algorithms that are enabling state-of-the-art lattice QCD simulations. We will begin with an overview of the developments that have been crucial in simulating fermions at physical quark masses and fine lattice spacings. This will include an overview on iterative linear solver methods, such as multi-grid methods, and challenges arising from large scale Markov-chain...

64. Matching lattice QC+ED to Nature

Prof. Nazario Tantalo (University and INFN of Rome Tor Vergata)

13/08/2022, 11:45

Theoretical Developments and Applications beyond Particle Physics

Plenary

The first step in any QFT calculation of a phenomenological observable is the matching of the theory to Nature. The matching procedure fixes the parameters of the theory in terms of an equal number of external inputs that, if the theory is expected to reproduce observations, must be experimentally measured physical quantities. At the (sub)percent level of accuracy QED radiative corrections...