6533b828fe1ef96bd1287942
RESEARCH PRODUCT
Low-energy particle physics and chiral extrapolations
Hartmut Wittigsubject
QuarkPhysicsParticle physicsNuclear TheoryMesonHigh Energy Physics::LatticeHadronLattice field theoryNuclear TheoryHigh Energy Physics::PhenomenologyHigh Energy Physics - Lattice (hep-lat)FOS: Physical sciencesNuclear physicsNuclear Theory (nucl-th)High Energy Physics - PhenomenologyHigh Energy Physics - LatticeLow energyHigh Energy Physics - Phenomenology (hep-ph)Lattice (order)High Energy Physics::ExperimentNucleondescription
In this review I discuss the role of chiral extrapolations for the determination of several phenomenologically relevant quantities, including light quark masses, meson decay constants and the axial charge of the nucleon. In particular, I investigate whether chiral extrapolations are sufficiently controlled in order to rightfully claim the accuracy which is quoted in recent compilations of these quantities. While this is the case for the masses of the light quarks and the ratio fK/fpi of decay constants, small inconsistencies in the chiral and continuum behaviour of individual decay constants fK and fpi, as well as the hadronic radii r0, r1 remain and must be clarified. In the case of the nucleon axial charge, gA, the chiral behaviour is still poorly understood due to the presence of other systematic effects.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-01-23 |