English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Lattice QCD simulations are now reaching a precision where isospin breakingeffects become important. Previously, we have developed a program tosystematically investigate the pattern of flavor symmetry beaking within QCDand successfully applied it to meson and baryon masses involving up, down andstrange quarks. In this Letter we extend the calculations to QCD + QED andpresent our first results on isospin splittings in the pseudoscalar meson andbaryon octets. In particular, we obtain the nucleon mass difference of$M_n-M_p=1.35(18)(8)\,\mbox{MeV}$ and the electromagnetic contribution to thepion splitting $M_{\pi^+}-M_{\pi^0}=4.60(20)\,\mbox{MeV}$. Further we reportfirst determination of the separation between strong and electromagneticcontributions in the $\bar{MS}$ scheme.

Isospin splittings of meson and baryon masses from three-flavor lattice QCD + QED