Aug 8 – 13, 2022
Hörsaalzentrum Poppelsdorf
Europe/Berlin timezone

Setting the Scale Using Baryon Masses with Isospin-Breaking Corrections

Aug 11, 2022, 10:20 AM
20m
CP1-HSZ/1st-1.002 - HS6 (CP1-HSZ)

CP1-HSZ/1st-1.002 - HS6

CP1-HSZ

50
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 $a\approx 0.076\,\text{fm}$.

Primary author

Alexander Segner (Johannes-Gutenberg Universität)

Co-authors

Andrew Hanlon (BNL) Andreas Risch (DESY, NIC) Hartmut Wittig

Presentation materials