Journal Article

PUBDB-2025-01369

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
American Physical Society Ridge, NY

This record in other databases:      

Please use a persistent id in citations: doi:10.1103/PhysRevD.111.L031505  doi:10.3204/PUBDB-2025-01369

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

---

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

---

Database coverage:
; ; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; SCOAP3 sponsored Journal ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---

---

Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Barca, L. (Corresponding author)DESY* ; Bali, G. ; Collins, S.
Nucleon sigma terms with a variational analysis from Lattice QCD
[10.3204/PUBDB-2024-07593]     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

---