Work

Measuring Mass Splittings in Baryon SU(2) Multiplets

Year: 2026

Type: preprint

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.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2609.34647

Authors: Alexandrou, Constantia, Bacchio, Simone, Evangelista, Antonio, Iona, Christos, Schneider, Christian

Institutions: University of Cyprus, Cyprus Institute

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: European High Performance Computing Joint Undertaking, European Commission, Research and Innovation Foundation

Awards: G4385058657, Three-dimensional imaging of the nucleon using lattice QCD, G6188493540, Muon HVP and smeared R-ratio from Lattice QCD, G6527909077

OpenAlex ID: W7214753559

Cites: 2

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Related to: 10