Lattice@CERN 2026: Improved estimators for lattice QCD correlation functions

Name: Lattice@CERN 2026: Improved estimators for lattice QCD correlation functions
Start: 2026-07-06T09:00:00+02:00
End: 2026-07-17T17:00:00+02:00
Location: CERN

6 Jul 2026, 09:00 → 17 Jul 2026, 17:00 Europe/Zurich

4/3-006 - TH Conference Room (CERN)

4/3-006 - TH Conference Room

CERN

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John Bulava, Matteo Di Carlo (CERN), Felix Erben (CERN), Nikolai Husung (CERN), Luchang Jin (Univeristy of Connecticut), Andreas Juttner (CERN), Marina Krstic Marinkovic (ETH Zurich), Simon Kuberski (CERN), Harvey Byron Meyer (CERN)

Description

Lattice QCD is delivering crucial input for precision observables that are used to test the Standard Model at low energies – see the FLAG review and the Muon g-2 Theory Initiative White Paper. The precision required on the hadronic contribution to these observables represents a significant challenge for lattice QCD and leads to large costs in computing time. The hadronic contributions are often computed as weighted integrals over Euclidean correlation functions, where the statistical noise at long distances can spoil the precision of the calculation. In other cases, specific hadronic matrix elements are needed, again requiring sufficiently large Euclidean time separations between the interpolating operators in order to suppress contamination by excited states.

In this CERN Theory Institute, we will bring together experts on reducing the statistical noise on lattice QCD correlation functions that might not often come together for focussed discussions on this topic because they work on rather different physics observables (e.g. flavour physics observables vs. the muon (g-2) vs. nucleon matrix elements). The goal is to review the state-of-the-art and most promising ideas across lattice QCD to make progress towards more efficient estimators of correlation functions.

This Theory Institute is supported by the CERN Theory Department and Next Generation Triggers (NGT).

Support

THworkshops.secretariat@cern.ch

Participants

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TH Computer Support

Elena Gianolio, Pascal Pignereau

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Monday 6 July
- Mon 6 Jul
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- Wed 8 Jul
- Thu 9 Jul
- Fri 10 Jul
- Mon 13 Jul
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- Wed 15 Jul
- Thu 16 Jul
- Fri 17 Jul
- 10:30
  
  Coffee 4/2-011 - TH common room
  
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  CERN
  
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- 1
  
  Welcome 4/3-006 - TH Conference Room
  
  4/3-006 - TH Conference Room
  
  CERN
  
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  lattice_cern_2026_intro.pdf
- 2
  
  Master field, stochastic locality, and position-space methods 4/3-006 - TH Conference Room
  
  4/3-006 - TH Conference Room
  
  CERN
  
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  Speaker: Jeremy Russell Green
  
  slides.pdf
- 12:15
  
  Lunch
- 3
  
  Improving operators and correlation functions for mesons, glueballs and baryons 4/3-006 - TH Conference Room
  
  4/3-006 - TH Conference Room
  
  CERN
  
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  Speaker: Juan Andres Urrea Nino
  
  CERN_ImprovedEstimators2026.pdf
- 4
  
  Accessing form factors at imaginary momentum in lattice QCD 4/3-006 - TH Conference Room
  
  4/3-006 - TH Conference Room
  
  CERN
  
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  Speaker: Max Hansen
  
  Hansen-CERN-2026.pdf
- 15:00
  
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- Reception
Tuesday 7 July
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  Taming excited-state contamination for precision hadron structure 4/3-006 - TH Conference Room
  
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  CERN
  
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  Speaker: Lorenzo Barca
  
  talk_lbarca.pdf
- 10:30
  
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  CERN
  
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- 6
  
  Application of Laplace filters to the analysis of lattice time correlators 4/3-006 - TH Conference Room
  
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  CERN
  
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  Speakers: Dr Antonin Portelli, Tobias Tsang (University of Liverpool (GB))
  
  portelli_tsang.pdf
- 12:15
  
  Lunch
- 7
  
  Lattice QCD two- and three-point functions using exact distillation with multi-particle interpolators 4/3-006 - TH Conference Room
  
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  CERN
  
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  Speaker: Dr Sven Lingscheid
  
  main.pdf
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  "Blending": an unbiased estimator for all-to-all quark propagators 4/3-006 - TH Conference Room
  
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  CERN
  
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  Speaker: Zhicheng Hu
  
  huzhch_BLD@cern_2026.pdf
- 15:00
  
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Wednesday 8 July
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  High-precision QCD+QED simulations 4/3-006 - TH Conference Room
  
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  CERN
  
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  Speaker: Christoph Lehner (University of Regensburg & BNL)
  
  qcd-qed-lehner-talk.pdf
- 10:30
  
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  CERN
  
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- 10
  
  Spectral Reconstruction: Rigorous Bounds from Noisy, Finite Data 4/3-006 - TH Conference Room
  
  4/3-006 - TH Conference Room
  
  CERN
  
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  Speaker: William Jay
  
  wjay_cern2026.pdf
- 12:15
  
  Lunch
- 11
  
  TH Colloquium: "Hamiltonian Methods from Quantum Information Technologies" 4/3-006 - TH Conference Room
  
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  CERN
  
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  Please check https://indico.cern.ch/event/1701077 for zoom link
  
  Speaker: Enrique Rico Ortega (CERN)
- 15:00
  
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Thursday 9 July
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  Machine learning approaches to lattice QCD 4/3-006 - TH Conference Room
  
  4/3-006 - TH Conference Room
  
  CERN
  
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  Speaker: Akio Tomiya (Tokyo Woman's Christian University)
  
  CERN2026_talk_memo_v6_essentialv3_slidesv3 copy 2.pdf
- 10:30
  
  Coffee 4/2-011 - TH common room
  
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  CERN
  
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- 13
  
  About the application of the blending method in the nucleon scalar and tensor charge 4/3-006 - TH Conference Room
  
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  CERN
  
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  Speaker: Yi-Bo Yang
  
  2026.07.09.pdf
- 12:00
  
  Lunch
- 14
  
  Emergence of the $\pi(1300)$ Resonance from Lattice QCD 4/3-006 - TH Conference Room
  
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  CERN
  
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  Speaker: Haobo Yan
  
  Lattice@CERN2026.pdf
- 15
  
  Advancing measurements of the topological charge correlator in finite-temperature simulations 4/3-006 - TH Conference Room
  
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  Speaker: Andrey Kotov
  
  CERN_Kotov_2026.pdf
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Friday 10 July
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  Investigations of loops in a two-level sampling algorithm 4/3-006 - TH Conference Room
  
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  Speaker: Jacob Friedrich Finkenrath (Bergische Universitaet Wuppertal (DE))
  
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- 10:30
  
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  Operator and correlator construction with distillation 4/3-006 - TH Conference Room
  
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  Speaker: John Bulava
  
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- 12:15
  
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Monday 13 July
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- 18
  
  Welcome 4/3-006 - TH Conference Room
  
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  lattice_cern_2026_intro2.pdf
- 19
  
  Divide and conquer: splitting methods for lattice QCD 4/3-006 - TH Conference Room
  
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  CERN
  
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  Speaker: Tim Harris (ETH Zürich)
  
  harris-latcern2026-v2.pdf
- 12:15
  
  Lunch
- 20
  
  Performance of Low Mode Averaging on physical pion mass Twisted-Mass ensembles 4/3-006 - TH Conference Room
  
  4/3-006 - TH Conference Room
  
  CERN
  
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  Speaker: Antonio Evangelista (University of Cyprus)
  
  Lattice@CERN_AE.pdf
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  Bayesian Model Averaging for Lattice Practitioners 4/3-006 - TH Conference Room
  
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  Speaker: Jake Sitison
  
  Sitison_BMA_LatticeCERN2026.pdf
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Tuesday 14 July
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  Limitations and new directions for contour deformations to minimize observable noise 4/3-006 - TH Conference Room
  
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  Speaker: Gurtej Kanwar (University of Edinburgh)
  
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  Learning the generating functional for variance reduction in lattice QCD 4/3-006 - TH Conference Room
  
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  Speaker: Fernando Romero Lopez
  
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  Normalising flows for all-orders QED corrections 4/3-006 - TH Conference Room
  
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  Speaker: Nils Hermansson Truedsson
  
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Wednesday 15 July
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  Stochastic automatic differentiation and noise reduction 4/3-006 - TH Conference Room
  
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  Speaker: Alberto Ramos Martinez (Univ. of Valencia and CSIC (ES))
  
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  A variational framework for variance reduction 4/3-006 - TH Conference Room
  
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  Speaker: Alessandro Nada (Università di Torino)
  
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- 12:15
  
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- 27
  
  Gluonic hadron structure  and new machine-learning approaches for lattice QCD (TH colloquium) 500/1-001 - Main Auditorium
  
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  Please check https://indico.cern.ch/event/1676650/ for information and zoom link
  
  Speaker: Phiala Elisabeth Shanahan (MIT)
  
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- 15:00
  
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Thursday 16 July
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  Spectral densities from Euclidean correlators via integral transforms 4/3-006 - TH Conference Room
  
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  Speaker: Leonardo Giusti (Universita & INFN, Milano-Bicocca (IT))
  
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- 10:30
  
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  High-Precision scale setting with the Omega baryon mass 4/3-006 - TH Conference Room
  
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  Speaker: Oleksiy Bazavov (Michigan State University (US))
  
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- 12:00
  
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  Four-point Correlation Functions: Computation, Applications, and Systematics 4/3-006 - TH Conference Room
  
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  Speaker: Zhaolong Zhang
  
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  Practical info 4/3-006 - TH Conference Room
  
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  First-principles determination of anomaly-induced pion decay beyond the chiral limit 4/3-006 - TH Conference Room
  
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  Speaker: Xu Feng (Peking University)
  
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  Chiral gauge theories and gauge field flow 4/3-006 - TH Conference Room
  
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Lattice@CERN 2026: Improved estimators for lattice QCD correlation functions

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