English

Baryon masses from full QCD+QED${}_\text{C}$ simulations

High Energy Physics - Lattice 2021-12-24 v1

Abstract

In these proceedings we present preliminary results for the masses of the proton, neutron and Ω\Omega^- baryons obtained from QCD+QED lattice simulations performed with four dynamical quarks using C^* boundary conditions. These results are part of the ongoing effort of the RC{}^* collaboration discussed in the companion proceedings, and have been obtained on a single ensemble in which the renormalised electromagnetic coupling is αem0.04\alpha_{\text{em}}\sim 0.04, the physical volume is L1.7L\sim 1.7 fm and the masses of the four dynamical quarks have been tuned at the UU--spin symmetric point md=msm_d=m_s. We demonstrate on this unphysical ensemble that baryon masses can be calculated with satisfactory precision when including QED without the need for gauge--fixing and perturbation theory. This makes us confident in the effectiveness of the strategy presented here also in the case of simulations closer to the physical point.

Keywords

Cite

@article{arxiv.2112.12767,
  title  = {Baryon masses from full QCD+QED${}_\text{C}$ simulations},
  author = {Lucius Bushnaq and Isabel Campos and Marco Catillo and Alessandro Cotellucci and Madeleine Dale and Patrick Fritzsch and Jens Lücke and Marina Krstić Marinković and Agostino Patella and Nazario Tantalo},
  journal= {arXiv preprint arXiv:2112.12767},
  year   = {2021}
}

Comments

8 pages, 5 figures; for the 38th International Symposium on Lattice Field Theory (LATTICE2021), 26th-30th July 2021, Zoom/Gather@Massachusetts Institute of Technology

R2 v1 2026-06-24T08:30:12.531Z