The Mystery of Missing Anti-Matter
Why Is the Universe Made Only of Matter?
It is a well-established fact that antimatter exists: Any charged particle has an antiparticle with opposite charge. For example, the positron is the anti-particle of the electron. Yet, anti-matter is very rare, there is much more matter in the universe than anti-matter. We only observe anti-matter in cosmic rays, radioactive decays, and nuclear processes. Given the fact that anti-matter seems to be an exact mirror image of matter, there is no apparent reason for the matter to dominate our universe. The explanation of the fact that anti-matter is so rare is an open question in physics.
In this talk, we will discuss the puzzle and the progress that was done so far in solving it. While the exact mechanism that makes our universe dominated by matter is unknown, a lot of progress in addressing the question was made. We know that it all occurs very early on, within the first second of the big bang. We will close the talk by reviewing some of the outstanding ideas that can be the solution to this long-standing puzzle.
About the Speaker
Yuval Grossman is currently a professor of physics at Cornell University. His research on theoretical physics concentrates on issues related to some of the most fundamental open questions in the field, like the mystery of anti-matter, neutrino physics, and dark matter.
Before moving to Cornell, Yuval was a professor at The Technion in Israel, a visiting professor at Harvard, Boston University and the Weizmann Institute of Science, and a Research Associate at Stanford,
Yuval earned his Ph.D.at the Weizmann Institute of science.