Science Buddies: "Ask an Expert"

I am attempting to prove the relationship between baryon asymmetry, dark matter, and dark energy (I understand that dark matter and antimatter are different things, that is not what I am asking). To do this, I need a better understanding of matter-antimatter relationships. For example, are there any conditions under which a meson could become stable? If not, are there any other subatomic structures that ordinary particles and antiparticles can form that might provide more stability without ending in their annihilation? Are there any known forces that may affect matter more or less than antimatter? Is antimatter affected by background radiation differently than matter? Anything helps. Thank you for your time!
~Sam Taylor

Hi Sam,

Particle physics is not my particular expertise, so I turned to a textbook to find out the answer to one of your questions. According to my trusty copy of Physics for Scientists and Engineers with Modern Physics, 7th edition, by Raymond Serway and John Jewett, Jr., "all mesons decay finally into electrons, positrons, neutrinos, and photons". Unfortunately, that's about as far as I can go. Hopefully someone who knows more physics that I do will chime in.