1. The problem statement, all variables and given/known data Is the following reaction possible? If so, by what force? Draw (one of, if applicable)the lowest order Feynmann diagrams for the process. n + n-bar --> ∏+ + ∏- + ∏0 2. Relevant equations N/A 3. The attempt at a solution This process, it seems to me, should be possible. It doesn't violate conservation of energy, charge, or baryon number. However, when I draw the feynmann diagram, I notice something odd. It is apparently possible to simply rearrange the quarks and antiquarks of the neutron and antineutron into the three pi mesons, without actually making any vertices in the diagram. This would suggest that the process isn't actually mediated by any kind of force... This can't be right, and I'm quite confused. Thank you for any help!