The effects of flavour symmetry breaking on hadron matrix elements
arXiv:1212.2564
Abstract
By considering a flavour expansion about the SU(3)-flavour symmetric point, we investigate how flavour-blindness constrains octet baryon matrix elements after SU(3) is broken by the mass difference between the strange and light quarks. We find the expansions to be highly constrained along a mass trajectory where the singlet quark mass is held constant, which proves beneficial for extrapolations of 2+1 flavour lattice data to the physical point. We investigate these effects numerically via a lattice calculation of the flavour-conserving and flavour-changing matrix elements of the vector and axial operators between octet baryon states.
14 pages, 5 figures, proceedings of the 30th International Symposium on Lattice Field Theory, June 24-29, 2012, Cairns, Australia, PoS(Lattice 2012)116
References in corpus (5)
- Lattice study of flavor SU(3) breaking in hyperon beta decay
- First Lattice QCD Study of the Sigma -> n Axial and Vector Form Factors with SU(3) Breaking Corrections
- F and D Values with Explicit Flavor Symmetry Breaking and Δs Contents of Nucleons
- Hyperon vector form factor from 2+1 flavor lattice QCD
- Hyperon Form Factors from N_f=2+1 QCD