6533b7d1fe1ef96bd125c2a8
RESEARCH PRODUCT
Nucleon average quark momentum fraction with Nf = 2+1 Wilson fermions
Konstantin OttnadHarvey B. MeyerTim HarrisGeorg M. Von HippelHartmut WittigJonas Wilhelmsubject
PhysicsQuantum chromodynamicsQuarkParticle physicsIsovector010308 nuclear & particles physicsHigh Energy Physics::LatticePhysicsQC1-999Nuclear TheoryFermion01 natural sciencesMomentumPion0103 physical sciences010306 general physicsNucleonPseudovectordescription
We report on an analysis of the average quark momentum fraction of the nucleon and related quantities using Nf = 2 + 1 Wilson fermions. Computations are performed on four CLS ensembles covering three values of the lattice spacing at pion masses down to Mπ ≈ 200 MeV. Several source-sink separations (~ 1:0 fm to ~ 1:4 fm) are used to assess the excited-state contamination. To gain further insight, the generalized pencil-of-functions approach has been implemented to reduce the excited-state contamination in the relevant two-and three-point functions. Preliminary results are shown for the isovector nucleon charges from vector, axial vector and tensor derivative (twist-2) operators.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-01-01 | EPJ Web of Conferences |