2019/03/31 by Alberto Accardi, Andrea Signori
Physics and Astronomy · #Color confinement #Fermion #Fragmentation (computing) #Gauge theory #Hadronization #High-Energy Particle Collisions Research #Mass generation #Particle physics #Particle physics theoretical and experimental studies #Physics #Propagator #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #hep-ex #hep-ph #nucl-th
paper · pdf · doi:10.1016/j.physletb.2019.134993
published version
openalex publication_date 2019/10/03 · arxiv created 2019/10/11 · arxiv updated 2019/10/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We address the propagation and hadronization of a struck quark by studying the gauge invariance of the color-averaged cut quark propagator, and by relating this to the single inclusive quark fragmentation correlator by means of new sum rules. Using suitable Wilson lines, we provide a gauge-invariant definition for the mass of the color-averaged dressed quark and decompose this into the sum of a current and an interaction-dependent component. The latter, which we argue is an order parameter for dynamical chiral symmetry breaking, also appears in the sum rule for the twist-3 E˜ fragmentation function, providing a specific experimental way to probe the dynamical generation of mass in Quantum Chromo Dynamics.