Electromagnetic effects in isospin symmetry breakings ofqq¯systems

Isospin Symmetry Breaking

Isospin symmetry breaking

We discuss the separation of isospin-symmetric and isospin-breaking contributions in the hadronic observables within the framework of QCD plus QED. Further, we briefly review some recent work on the low-energy hadron phenomenology, in which the isospin-breaking effect plays a prominent role.

Isospin symmetry breaking effects in the pion and nucleon masses

We investigate the electromagnetic mass splittings in the pseudoscalar meson and nucleon systems by combining 2+1 flavor domain wall fermion gauge configurations, generated by the RBC and UKQCD collaborations, and quenched, non-compact, lattice QED configurations. We analyze finite volume effects by using 16 3 × 32 and 24 3 × 64 lattices. Isospin symmetry breaking effects in the pion and nucleo...

From physics to biology by extending criticality and symmetry breakings.

Symmetries play a major role in physics, in particular since the work by E. Noether and H. Weyl in the first half of last century. Herein, we briefly review their role by recalling how symmetry changes allow to conceptually move from classical to relativistic and quantum physics. We then introduce our ongoing theoretical analysis in biology and show that symmetries play a radically different ro...

STUDY OF ISOSPIN SYMMETRY IN Zr

The knowledge of the isospin impurity (i.e. isospin mixing) is important since it affects the properties of the Isobaric Analog States (IAS) and the Fermi beta-decay of the N = Z nuclei near the proton drip-line. Indeed, the effect of the isospin impurity on the beta-decay has implications in the Fermi transition rates, and thus on the Cabibbo-Kobayashi-Maskawa matrix. The breaking of isospin s...