I think that it is interesting to understand the Sommerfeld formula e^2=hca. Why? Because until now nobody explained what ( a ) - ( fine structure constant ) is. And on Feynmans expression (a ) quantity is by the god given damnation to all physicists . ==. Therefore in the internet is possible to find 100 models of electron. For example. The book "What is the Electron?" Volodimir Simulik Montreal, Canada. 2005. / http://redshift.vif.com/BookBlurbs/Electron.htm
More than ten different models of the electron are presented here. (!!!) More than twenty models are discussed briefly. (!!!) Thus, the book gives a complete picture of contemporary theoretical thinking (traditional and new) about the physics of the electron.
But no one of these models is recognized as correct. ==.
Anti matter hydrogen have been made in the lab, and stored for I believe 11 minutes, this means positrons and antiprotons. Positrons (antimatter electrons) are also used for medical imaging (PET scanners). All of this is old news. Google is your friend.
This is also established science, though the question of perfect symmetry between matter and antimatter is still being tested.
It is probably you are dealing with out of date material. One of my favorite sites is phys.org , you might go over some of the new stuff.
Can you name any physics model that is recognized as "correct"? They are all approximations, with validity established only under particular circumstances.