Lattice field theory at the frontier of nuclear and particle physics

3 Nov 2026, 09:30 → 5 Nov 2026, 12:30 Asia/Taipei

SC353 (Kuang-Fu Campus, NYCU, Hsinchu)

The goal of this workshop is to bring together experts in lattice field theory and its applications to high-energy nuclear and particle physics.  In addition to research talks, there will be three pedagogical mini-courses aiming at bridging lattice calculations with contemporary research on phenomenology and quantum field theory.

Registration deadline is 23h59 Tuesday the 27th of October, 2026 Taiwan time.

The three pedagogical mini-courses are

• The muon anomalous magnetic moment: a high-precision probe of the Standard Model 
  
  by Laurent Lellouch (Aix-Marseille U. and CNRS, France)
  
  
  
• Scattering amplitudes from Euclidean Lattice QCD
  
  by Stephen Sharpe (U. of Washington, Seattle, USA)
  
   
• Lattice QCD and neutrinoless double beta decay
  
  by Andre Walker-Loud (LBNL and U. of California, Berkeley, USA)
  
  
  

Research talk speakers and titles are

• Alex Chang (NYCU, Taiwan)
  
  Moments of pion and kaon light-cone distribution amplitudes from dynamical lattice QCD using the heavy-quark operator product expansion 
  
  
  
• William Detmold (MIT, USA)
  
  Spectral bounds in multi-hadron spectroscopy 
  
  
  
• Jangho Kim (Seoul National U., Korea)
  
  Higher moments of parton distributions from lattice QCD with gradient flow 
  
  
  
• Laurent Lellouch (Aix-Marseille U. and CNRS, France)
  
  Hadronic vacuum polarization to three loops in chiral perturbation theory 
  
  
  
• Isabella Leone Zimmel (U. of Valencia, Spain)
  
  Lattice calculation for QCD strong coupling 
  
  
  
• Wayne Morris (NYCU, Taiwan)
  
  The Collins-Soper kernel from a vacuum soft function 
  
  
  
• Thamirys de Oliveira (NYCU, Taiwan)
  
  Tuning a relativistic heavy-quark action using machine learning
  
  
  
• Antonio Rago (U. of Odense, Denmark)
  
  Heavy-meson mixing and lifetimes via gradient flow 
  
  
  
• Manuel Schneider (NYCU, Taiwan)
  
  Parton physics from Hamiltonian lattice gauge theory with tensor networks 
  
   
• Stephen Sharpe (U. of Washington, Seattle, USA)
  
  Progress in determining multiparticle amplitudes from Lattice QCD 
  
   
• Andre Walker-Loud (LBNL and U. of California, Berkeley, USA)
  
  Lattice QCD calculations of two-nucleons at light pion mass and connecting to EFT 
  
  
  
• David Ward (NTU, Taiwan)
  
  Study of symmetries from $N_f=2$ and $N_f=2+1$ finite femperature QCD using mobius domain wall fermions 
   
   

All are welcome.

Organisers: Anthony Francis and C.-J. David Lin

Sponsored by National Science and Technology Council, National Centre for Theoretical Sciences

Tuesday 3 November

09:30 → 10:30 Scattering amplitudes from Euclidean Lattice QCD (I)

Speaker: Prof. Stephen Sharpe (U. of Washington, Seattle)

sharpe_taiwan_lec1.pdf

10:30 → 11:00 Coffee

11:00 → 12:00 The muon anomalous magnetic moment: a high-precision probe of the Standard Model (I)

The Muon g−2 Experiment at Fermi National Accelerator Laboratory has concluded its six-year data-taking campaign with a measurement of the muon's anomalous magnetic moment, a_μ, at a precision of 0.127 parts per million. Because a_μ arises entirely from quantum fluctuations, it is sensitive to all the particles and interactions of the Standard Model, as well as to possible new degrees of freedom that are too heavy or too weakly coupled to be produced directly. To fully exploit this sensitivity, however, a theoretical prediction of comparable accuracy is required.

In this course, I will first explain why lepton anomalous magnetic moments, particularly the muon's, are such effective probes of fundamental physics, and describe how a_μ is measured, from producing polarized muons to extracting their anomalous spin-precession frequency in a storage ring. I will then review the Standard Model prediction: the QED contributions, now known to five loops; the electroweak corrections; and the hadronic contributions, which dominate the theoretical uncertainty. After discussing the dispersive, data-driven determination of the leading-order hadronic vacuum polarization contribution and the tensions that have emerged among the underlying e⁺e⁻ → hadrons measurements, I will give a brief introduction to lattice QCD. I will then present a hybrid calculation of this contribution, in which about 96% is computed from first principles on the lattice and the small remainder is obtained from e⁺e⁻ → hadrons data. Combined with all other Standard Model contributions, this result yields a prediction that agrees with experiment within one standard deviation, thereby testing the Standard Model at the level of 0.4 parts per billion on the muon magnetic moment, g_μ=2(1+ a_μ). I will conclude with the open questions that remain and the prospects for further progress on both the experimental and theoretical fronts.

Speaker: Prof. Laurent Lellouch (Aix-Marseille U.)

12:00 → 12:30 Lattice calculation for QCD strong coupling

Speaker: Ms Isabella Leone Zimmel (U. of Valencia)

12:30 → 14:00 Lunch

14:00 → 15:00 Lattice QCD and neutrinoless double beta decay (I)

Speaker: Prof. Andre Walker-Loud (LBNL)

15:00 → 15:30 Study of symmetries from N_f = 2 and N_f = 2+1 finite femperature QCD using mobius domain wall fermions

Speaker: Dr David Ward (National Taiwan U.)

15:30 → 16:00 Coffee

16:00 → 17:00 Heavy-meson mixing and lifetimes via gradient flow

Speaker: Prof. Antonio Rago (U. of Odense)

17:00 → 17:30 Higher moments of parton distributions from lattice QCD with gradient flow

Speaker: Dr Jangho Kim (Seoul National University)

Wednesday 4 November

09:30 → 10:30 Lattice QCD and neutrinoless double beta decay (II)

Speaker: Prof. Andre Walker-Loud (LBNL)

10:30 → 11:00 Coffee

11:00 → 12:00 Scattering amplitudes from Euclidean Lattice QCD (II)

Speaker: Prof. Stephen Sharpe (U. of Washington, Seattle)

12:00 → 12:30 Moments of pion and kaon light-cone distribution amplitudes from dynamical lattice QCD using the heavy-quark operator product expansion

Speaker: Mr S.-P. Alex Chang (National Yang Ming Chiao Tung University)

12:30 → 14:00 Lunch

14:00 → 15:00 Spectral bounds in multi-hadron spectroscopy

Speaker: Prof. William Detmold (Massachusetts Institute of Technology)

15:00 → 15:30 The Collins-Soper kernel from a vacuum soft function

Speaker: Dr Wayne Morris (National Yang Ming Chiao Tung University)

15:30 → 16:00 Coffee

16:00 → 17:00 The muon anomalous magnetic moment: a high-precision probe of the Standard Model (II)

The Muon g−2 Experiment at Fermi National Accelerator Laboratory has concluded its six-year data-taking campaign with a measurement of the muon's anomalous magnetic moment, a_μ, at a precision of 0.127 parts per million. Because a_μ arises entirely from quantum fluctuations, it is sensitive to all the particles and interactions of the Standard Model, as well as to possible new degrees of freedom that are too heavy or too weakly coupled to be produced directly. To fully exploit this sensitivity, however, a theoretical prediction of comparable accuracy is required.

In this course, I will first explain why lepton anomalous magnetic moments, particularly the muon's, are such effective probes of fundamental physics, and describe how a_μ is measured, from producing polarized muons to extracting their anomalous spin-precession frequency in a storage ring. I will then review the Standard Model prediction: the QED contributions, now known to five loops; the electroweak corrections; and the hadronic contributions, which dominate the theoretical uncertainty. After discussing the dispersive, data-driven determination of the leading-order hadronic vacuum polarization contribution and the tensions that have emerged among the underlying e⁺e⁻ → hadrons measurements, I will give a brief introduction to lattice QCD. I will then present a hybrid calculation of this contribution, in which about 96% is computed from first principles on the lattice and the small remainder is obtained from e⁺e⁻ → hadrons data. Combined with all other Standard Model contributions, this result yields a prediction that agrees with experiment within one standard deviation, thereby testing the Standard Model at the level of 0.4 parts per billion on the muon magnetic moment, g_μ=2(1+ a_μ). I will conclude with the open questions that remain and the prospects for further progress on both the experimental and theoretical fronts.

Speaker: Prof. Laurent Lellouch (Aix-Marseille U.)

17:00 → 17:30 Tuning a relativistic heavy-quark action using machine learning

Speaker: Dr Thamirys de Oliveira (National Yang Ming Chiao Tung University)

Thursday 5 November

09:30 → 10:00 Hadronic vacuum polarization to three loops in chiral perturbation theory

At low virtualities, hadronic vacuum polarization (HVP) limits the precision of key Standard Model tests, notably the muon anomalous magnetic moment and the running of the electromagnetic coupling. Chiral perturbation theory constrains its functional form in this regime and provides the framework for computing finite-volume effects in lattice QCD. In this seminar, I will present a three-loop (N³LO) calculation of HVP in two-flavor chiral perturbation theory, the only second three-loop computation in this effective theory.

Integration-by-parts reduction expresses the amplitude in terms of eleven three-loop master integrals, six of which are elliptic functions of the photon virtuality. Five of these are new, and all are related to the equal-mass three-loop sunset integral. I will explain how Tarasov's dimensional shift separates their divergences from their elliptic content. I will also show that renormalizability requires relations among master integrals that do not follow from integration by parts: Schouten relations, which hold only in fixed integer dimension. Differential equations then reduce the most complicated integrals to one-dimensional integrals over the sunset, enabling fast, high-precision evaluation for arbitrary complex virtualities. In the resulting amplitude, the elliptic part contains no free parameters and gives the leading contribution to the four-pion cut. I will conclude with prospects for phenomenology and for finite-volume corrections to lattice calculations.

Speaker: Prof. Laurent Lellouch (Aix-Marseille U.)

10:00 → 10:30 Progress in determining multiparticle amplitudes from Lattice QCD

Speaker: Prof. Stephen Sharpe (U. of Washington, Seattle)

10:30 → 11:00 Coffee

11:00 → 11:30 Lattice QCD calculations of two-nucleons at light pion mass and connecting to EFT

Speaker: Prof. Andre Walker-Loud (LBNL)

11:30 → 12:30 Parton physics from Hamiltonian lattice gauge theory with tensor networks

Speaker: Dr Manuel Schneider (National Yang Ming Chiao Tung University)