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

Setting the Scale Using Baryon Masses with Isospin-Breaking Corrections

11 Aug 2022, 10:20

20m

CP1-HSZ/1.002 (CP1-HSZ) - HS6 (CP1-HSZ)

Oral Presentation Hadron Spectroscopy and Interactions Hadron Spectroscopy and Interactions

Speaker

Alexander Segner (Johannes-Gutenberg Universität)

Description

We present first results from our effort to incorporate isospin-breaking effects stemming from the non-degeneracy of the light quark masses and electromagnetic interactions into the determination of the lattice scale. To this end we compute the masses of octet and decuplet baryons on isospin-symmetric ensembles generated by the CLS effort for $N_f=2+1$ flavours and include isospin-breaking
effects perturbatively. We show leading-order results for baryon masses on two ensembles with $m_\pi\approx 290\,\text{MeV}$ and $m_\pi\approx 215\,\text{MeV}$ at a lattice spacing of $a\approx 0.076\,\text{fm}$.

Presentation materials

main.pdf