The 39th International Symposium on Lattice Field Theory (Lattice 2022)

An update on QCD+QED simulations with C⋆ boundary conditions

12 Aug 2022, 16:40

20m

CP1-HSZ/1.004 (CP1-HSZ) - HS7 (CP1-HSZ)

Oral Presentation Hadron Spectroscopy and Interactions Hadron Spectroscopy and Interactions

Speaker

Jens Lücke (Humboldt University Berlin)

Description

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 ${\alpha }_R\approx {\alpha }_{\text{phys.}}$ and ${\alpha }_R\approx 5.5{\alpha }_{\text{phys.}}$ respectively. In this talk we will discuss some details concerning our tuning strategy, we will present our calculation of the meson and baryon masses, and we will comment on finite-volume effects comparing meson masses on two different volumes with $m_{{\pi }^{\pm }}L\approx 3.2$ and $m_{{\pi }^{\pm }}L\approx 5.1$. Finally, we will also present a cost analysis for our simulations. More technical details will be discussed in the companion poster presented by A. Cotellucci.

Presentation materials

LATTICE2022_Jens_Luecke_120822.pdf