Preprint

PUBDB-2025-03625

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Current-Enhanced Excited States in Lattice QCD Three-Point Functions

Barca, L. (Corresponding author)DESY*

2025

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Please use a persistent id in citations: doi:10.3204/PUBDB-2025-03625

Report No.: DESY-25-115; arXiv:2508.09006

Abstract: Excited-state contamination remains one of the leading sources of systematic uncertainty in the precise determination of hadron structure observables from lattice QCD. In this letter, we present a general argument, inspired by current-meson dominance and implemented through the variational method, to identify which excited states are enhanced by the choice of the inserted current and kinematics. The argument is supported by numerical evidence across multiple hadronic channels and provides both a conceptual understanding and practical guidance to account for excited-state effects in hadron three-point function analyses.

Note: 5 pages + Appendix

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Contributing Institute(s):

1. Zeuthen Particle PhysicsTheory (Z_ZPPT)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)
2. DFG project G:(GEPRIS)451886959 - FOR 5269: Zukünftige Methoden für Studien von eingeschlossenen Gluonen in QCD (451886959) (451886959)
3. DFG project 448374536 - Fortschritte bei einer präzisen ab initio Bestimmung der Partonen-Struktur von Hadronen (448374536) (448374536)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2025

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Database coverage:
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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article Barca, L. (Corresponding author)DESY*
Current-enhanced excited states in lattice QCD three-point functions
Physical review / D 112(9), L091503 (2025) [10.1103/69yc-d74z]2025     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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