6533b82afe1ef96bd128ccb9
RESEARCH PRODUCT
Towards leading isospin breaking effects in mesonic masses with $O(a)$ improved Wilson fermions
Hartmut WittigAndreas Rischsubject
Quantum chromodynamicsQuarkPhysicsParticle physics010308 nuclear & particles physicsPhysicsQC1-999Computer Science::Information RetrievalHigh Energy Physics::LatticeHigh Energy Physics - Lattice (hep-lat)Nuclear TheoryHigh Energy Physics::PhenomenologyFOS: Physical sciencesFermionGauge (firearms)01 natural sciencesElectric chargeSymmetry (physics)High Energy Physics - LatticeIsospin0103 physical sciencesPath integral formulationHigh Energy Physics::Experiment010306 general physicsdescription
We present an exploratory study of leading isospin breaking effects in mesonic masses using $O(a)$ improved Wilson fermions. Isospin symmetry is explicitly broken by distinct masses and electric charges of the up and down quarks. In order to be able to make use of existing isosymmetric QCD gauge ensembles we apply reweighting techniques. The path integral describing QCD+QED is expanded perturbatively in powers of the light quarks' mass deviations and the electromagnetic coupling. We employ QED$_{\mathrm{L}}$ as a finite volume formulation of QED.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-10-18 |