Systems constituted by purely leptonic
matter are an example of a sector where experimental results related to the time reversal symmetry--and to discrete symmetries in general--remain rare.
Abstract: We describe new implementations of leptonic
and hadronic models for the broadband emission from relativistic jets in AGN in a temporary steady state.
In the leptonic
theory, a proton is a tightly bound state of two positrons and one electron where the binding force is primarily magnetic.
Global analysis of neutrino masses, mixings and phases: Entering the era of leptonic
CP violation searches.
This changes by the addition of discrete symmetry that controls the pattern of the leptonic
mass matrix [37-39]; for a review on the subject see, e.g., [40, 41].
Key to understanding this relationship is the unification between leptonic
neutrinos and gluons.
However, it is important to keep in mind that other classes of sources (e.g., pulsar wind nebulae for leptonic
CRs , OB associations , and X-ray binaries ) and several other acceleration mechanisms have been proposed as well.
"Positronium, the bound state of the electron and positron, is a purely leptonic
state--it is effectively free of hadronic and weak-interaction effects" , and its annihilation is calculated with high precision in QED.
in terms of the leptonic
weak current ([J.sup.-]), as well as the hadronic vector (V) and axial.vector (A) currents.
Moreover, the leptonic
decay constants of the vertices are [mathematical expression not reproducible], and [mathematical expression not reproducible] 
Examples of observables of this kind are the electric dipole moments of the neutron and atoms, and T-odd correlations in leptonic
and semileptonic decays.
By considering the isospin symmetric modes of the measured channels, we can estimate the lower limits on the leptonic
partial width of the Y(4220) and Y(4390) decays.
Looking at the distribution of the leading lepton and the peak of the distribution we suggest that the leading lepton is coming from the leptonic
decay of W.