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Investigation of two-particle contributions to nucleon matrix elements

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arxiv 2312.15737 v2 pith:UCELJKHI submitted 2023-12-25 hep-lat

Constantia Alexandrou , Giannis Koutsou , Yan Li , Marcus Petschlies , Ferenc Pittler This is my paper · ORCID
classification hep-lat
keywords nucleoncontributionselementsensemblesmatrixresultscarriedcharges
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We investigate contributions of excited states to nucleon matrix elements by studying the two- and three-point functions using nucleon and pion-nucleon interpolating fields. This study is carried out using twisted mass fermion ensembles with pion masses 346 MeV and 131 MeV. We compare the results obtained using these two ensembles and show preliminary results for nucleon charges.

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  1. Spectral analysis for nucleon-pion and nucleon-pion-pion states in both parity sectors using distillation with domain-wall fermions

    hep-lat 2024-12 conditional novelty 6.0 of 10

    A distillation-based GEVP analysis resolves nucleon, nucleon-pion, and, for the first time, nucleon-pion-pion states in lattice QCD, with a physical-point nucleon mass of 0.927(21)(05) GeV.

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