| Issue |
EPJ Web Conf.
Volume 258, 2022
A Virtual Tribute to Quark Confinement and the Hadron Spectrum (vConf21)
|
|
|---|---|---|
| Article Number | 10002 | |
| Number of page(s) | 8 | |
| Section | Parallel Presentations Track Focus Subs | |
| DOI | https://doi.org/10.1051/epjconf/202225810002 | |
| Published online | 11 January 2022 | |
https://doi.org/10.1051/epjconf/202225810002
Hadrons as QCD Bound States
Department of Physics, POB 64, FIN-00014 University of Helsinki, Finland
* e-mail: paul.hoyer@helsinki.fi
Published online: 11 January 2022
Bound state perturbation theory is well established for QED atoms. Today the hyperfine splitting of Positronium is known to 𝒪 (α7 log α). Whereas standard expansions of scattering amplitudes start from free states, bound states are expanded around eigenstates of the Hamiltonian including a binding potential. The eigenstate wave functions have all powers of α, requiring a choice in the ordering of the perturbative expansion. Temporal (A0 = 0) gauge permits an expansion starting from valence Fock states, bound by their instantaneous gauge field. This formulation is applicable in any frame and seems promising even for hadrons in QCD. The 𝒪(αs0) confining potential is determined (up to a universal scale) by a homogeneous solution of Gauss’ law.
© The Authors, published by EDP Sciences, 2022
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.