PoS - Proceedings of Science
Volume 430 - The 39th International Symposium on Lattice Field Theory (LATTICE2022) - Hadron Spectroscopy and Interactions
$N_f = 1+2+1$ QCD+QED simulations with C$^\star$ boundary conditions
J. Lücke*, A. Altherr, L. Bushnaq, I. Campos, M. Catillo, A. Cotellucci, M.E.B. Dale, P. Fritzsch, R. Gruber, M. Marinkovic, A. Patella, N. Tantalo, P. Tavella and  for the RC* collaboration
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Pre-published on: March 22, 2023
Published on: April 06, 2023
We give an update on the ongoing effort of the RC$^\star$ collaboration to generate fully dynamical QCD+QED configurations with C$^\star$ boundary conditions using the openQ$^\star$D code. The simulations are tuned to the U-symmetric point ($m_d=m_s$) with pions at $m_{\pi^\pm}\approx 400$ MeV. The splitting of the light mesons is used as one of three tuning observables and fixed to $m_{K^0} - m_{K^\pm} \approx 5$ MeV and $m_{K^0} - m_{K^\pm} \approx 25$ MeV on ensembles with renormalized electromagnetic coupling $\alpha_\mathrm{R} \approx \alpha_\mathrm{phys.}$ and $\alpha_\mathrm{R}\approx 5.5 \alpha_\mathrm{phys.}$ respectively. We will discuss some details concerning our tuning strategy and present the calculation of the meson and baryon masses. Finally, we will also present a cost analysis for our simulations. More technical details on finite-volume effects and the tuning can be found in A. Cotellucci's proceedings.
DOI: https://doi.org/10.22323/1.430.0064
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