October 31, 2023 to November 4, 2023
Europe/Athens timezone

Investigation of two-particle contributions to nucleon matrix elements

Nov 2, 2023, 4:10 PM
Talk in workshop 2: "QCD analysis of nucleon structure" Parallel Workshop 2


Yan Li (University of cyprus)


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 made using twisted mass fermion ensembles with pion masses 346 MeV and 131 MeV. We construct an improved nucleon interpolating field with the generalized eigenvalue problem of two-point functions, and use it to study three-point functions. This method itself is also discussed in more details. We compare results obtained using these two ensembles and show preliminary results for nucleon charges.

Primary authors

Constantia Alexandrou (University of Cyprus & Cyprus Institute) Ferenc Pittler (The Cyprus Institute) Giannis Koutsou (The Cyprus Institute) Marcus Petschlies (HISKP, Universität Bonn) Yan Li (University of cyprus)

Presentation materials