# Could this happen? Proton-Antineutron Collision

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## Main Question or Discussion Point

OK, let's say we had a proton and an antineutron. The proton, I believe, is composed of two up quarks and a down quark. The antineutron is probably composed of two down antiquarks and one up antiquark. My question is, if these were to collide, would one down quark from the proton collide with one down antiquark from the neutron, and one up quark from the proton would collide with one up antiquark from the neutron, creating a particle composed of an up quark and a down antiquark? So, I guess I have three questions:

1. Would a collision work like I stated above?
2. Would an up-quark down-antiquark particle be made?
3. Would such a particle be stable?

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K^2
2) It could be. This meson is called a pion. There are 3 different pions, and this is the positively charged one, $\pi^+$.