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PreprintCC BY 4.0arXiv

Measuring Mass Splittings in Baryon SU(2) Multiplets

  • Constantia Alexandrou
  • Simone Bacchio
  • Antonio Evangelista
  • Christos Iona
  • Christian Schneider
Open at sourcePDFDOICite

Abstract

The inclusion of isospin-breaking corrections arising from electromagnetic interactions and the up-down quark mass difference is becoming increasingly important in lattice QCD calculations, as the precision of observables is at or approaching the percent level. In this context, the RM123 method has been employed in recent years to take into account such isospin corrections. In this work, we study baryon mass splittings using the RM123 approach. Preliminary results are presented for the mass splittings within spin-1/2 and spin-3/2 baryon SU(2) multiplets, obtained using twisted-mass ensembles tuned close to physical quark masses. We consider only valence contributions, with the splittings computed at leading order in the isospin-breaking parameters.

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Cite

BibTeXRIS
BibTeX
@misc{alexandrou2026measuring,
  title = {{Measuring Mass Splittings in Baryon SU(2) Multiplets}},
  author = {Constantia Alexandrou and Simone Bacchio and Antonio Evangelista and Christos Iona and Christian Schneider},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.34647},
  eprint = {2609.34647},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.34647},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Measuring Mass Splittings in Baryon SU(2) Multiplets
AU  - Constantia Alexandrou
AU  - Simone Bacchio
AU  - Antonio Evangelista
AU  - Christos Iona
AU  - Christian Schneider
PY  - 2026
DA  - 2026/09/28
PB  - arXiv
DO  - 10.48550/arxiv.2609.34647
UR  - https://arxiv.org/abs/2609.34647
AB  - The inclusion of isospin-breaking corrections arising from electromagnetic interactions and the up-down quark mass difference is becoming increasingly important in lattice QCD calculations, as the precision of observables is at or approaching the percent level. In this context, the RM123 method has been employed in recent years to take into account such isospin corrections. In this work, we study baryon mass splittings using the RM123 approach. Preliminary results are presented for the mass splittings within spin-1/2 and spin-3/2 baryon SU(2) multiplets, obtained using twisted-mass ensembles tuned close to physical quark masses. We consider only valence contributions, with the splittings computed at leading order in the isospin-breaking parameters.
ER  -