0000000000411693

AUTHOR

Vera Guelpers

showing 2 related works from this author

The scalar radius of the pion in two-flavor Wilson lattice QCD

2014

PhysicsParticle physicsPionScalar (mathematics)RadiusLattice QCDFlavorProceedings of 31st International Symposium on Lattice Field Theory LATTICE 2013 — PoS(LATTICE 2013)
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The leading disconnected contribution to the anomalous magnetic moment of the muon

2014

The hadronic vacuum polarization can be determined from the vector correlator in a mixed time-momentum representation. We explicitly calculate the disconnected contribution to the vector correlator, both in the $N_f = 2$ theory and with an additional quenched strange quark, using non-perturbatively $O(a)$-improved Wilson fermions. All-to-all propagators are computed using stochastic sources and a generalized hopping parameter expansion. Combining the result with the dominant connected contribution, we are able to estimate an upper bound for the systematic error that arises from neglecting the disconnected contribution in the determination of $(g-2)_\mu$.

PhysicsStrange quarkMuonAnomalous magnetic dipole momentHigh Energy Physics::LatticeHadronHigh Energy Physics - Lattice (hep-lat)PropagatorFOS: Physical sciencesFermionUpper and lower boundsHigh Energy Physics - LatticeQuantum electrodynamicsVacuum polarization
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