Light Cone 2026: Applications at EIC era (LC 2026)

Session

QCD Dynamics, Instantons, and Nuclear Structure

Jun 24, 2026, 9:00 AM

CFNS, Peter Paul Seminar Room, C 120 Physics Building (Stony Brook University/Online)

41. Instantons and QCD orbital angular momentum in the nucleon

Christian Weiss (Jefferson Lab)

6/24/26, 9:00 AM

QCD Dynamics, Instantons, and Nuclear Structure

Chiral symmetry breaking by instantons converts low-energy QCD into an effective dynamics of massive fermions with chiral spin-flavor interactions. The same mechanism converts QCD operators with gauge fields into effective multifermion operators. Large instanton effects are observed in the twist-3 part of the QCD quark energy-momentum tensor [1], which controls the decomposition of the quark...

33. Hadronic Light-Front Wave Functions from the Instanton Vacuum

Wei-Yang Liu (Stony Brook University)

6/24/26, 9:40 AM

QCD Dynamics, Instantons, and Nuclear Structure

Light-front dynamics provides a natural framework for describing hadron structure in terms of partonic degrees of freedom, yet the role of the QCD vacuum remains subtle. In instanton liquid vacuum, nonlocal, momentum-dependent interactions for light quarks emerge from semiclassical gauge configurations in Euclidean space. By analytical continuation back to lightcone signature, we connects...

31. Second-order effective Hamiltonian of QCD

Kamil Serafin (Tufts University)

6/24/26, 10:20 AM

QCD Dynamics, Instantons, and Nuclear Structure

I will present the full second-order effective Hamiltonian of QCD, computed and renormalized using the renormalization group procedure for effective particles (RGPEP) and the canonical Hamiltonian as the starting point. The infrared singularities are regulated by a small gluon mass, and the final Hamiltonian is obtained in the limit of that mass approaching zero. We show that the matrix...

40. Light-front nuclear structure from chiral EFT dynamics: Deuteron

Frank Vera (NSF-JLab)

6/24/26, 11:10 AM

QCD Dynamics, Instantons, and Nuclear Structure

We present a new approach to light-front nuclear structure based on chiral EFT dynamics. It is intended for analyzing the low-energy nuclear structure at fixed light-front time, as it would be sampled in high-energy scattering processes on the nucleus. The elements of light-front nuclear structure in nucleon and pion degrees of freedom (configurations, propagation, interactions) are formulated...

47. Insights from Light-Front Quantization on the Unruh Effect

Alexandre Deur (Jefferson Lab)

6/24/26, 11:30 AM

QCD Dynamics, Instantons, and Nuclear Structure

The Unruh effect is a widely accepted expectation that the virtual particles of the Instant-Form vacuum appear to an accelerated observer as a gas of real particles at a temperature proportional to the acceleration. In this talk, we will show that the effect is absent in a Front-Form analysis, therefore questioning its objective existence, and how the Front-Form and Instant-Form conclusions...