# Baryon - Anti Baryon scattering

Is it possible, for a strong interaction of the above described type (baryon - anti baryon), to exist?

$$B + \bar B \to \ldots$$

(Where $B$ is a generic baryon and $\bar B$ the anti-)

Namely like a parallel exchange of 3 gluons, all with positive charges (of course)?

Some example?

Thank you!!

Yes, you can observe elastic proton-anti-proton scattering. Indeed, the cross section is not all that different from that of elastic proton-proton scattering. The main difference is that $pp$ is predominantly elastic at low energy, and dominantly inelastic at high energy, whereas $p\bar{p}$ is dominantly inelastic at all energies. Also note that inelastic high energy $pp$ and $p\bar{p}$ scattering are nearly indistinguishable. This means high energy $p\bar{p}$ scattering is not really annihilation, just elastic parton scattering followed by production of soft particles.
• Right! How stupid I am. They are neutral, electrically. Oh I have one last question. Supposing I have a $bg$ gluon. How do I write it in the octet base? Thank you so much again!! – Les Adieux Jan 10 '16 at 18:27