Preprint

PUBDB-2024-07593

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Nucleon sigma terms with a variational analysis from Lattice QCD

Barca, L. (Corresponding author)DESY* ; Bali, G. ; Collins, S.

2024

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Please use a persistent id in citations: doi:10.3204/PUBDB-2024-07593

Report No.: DESY-24-202; arXiv:2412.13138

Abstract: We determine the nucleon-sigma terms from lattice QCD. We find that the dominant excited state contamination in the nucleon three-point function with a scalar current is due to the transition between the nucleon and a S-wave scattering state of a nucleon and a scalar (sigma) meson. In this proof-of-concept study, we analyse a single $N_f=3$ ensemble with the unphysically large pion mass $M_\pi=429$ MeV. Excited state contamination is substantially reduced compared to the standard method when employing nucleon-sigma type interpolating operators within a generalised eigenvector analysis.

Note: 6 pages, 2 figures; v2: Version accepted for publication as a Letter in PRD

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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)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2024

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Database coverage:
; ; Published

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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* ; Bali, G. ; Collins, S.
Nucleon sigma terms with a variational analysis from Lattice QCD
Physical review / D 111(3), L031505 (2025) [10.1103/PhysRevD.111.L031505]2025     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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