Question

what happens when anti neutron and neutron annihilate​

Answer 1

Explanation:

If proton do interact with anti-neutron, they could form meson (a particle consist of 2 quarks). They could form the same anti-meson too. Just then these two mesons could annihilate. ... This particle consisted of 2 quarks which are against each other (up/anti-up or down/anti-down).

Answer 2

Since the antineutron is electrically neutral, it cannot easily be observed directly. Instead, the products of its annihilation with ordinary matter are observed. In theory, a free antineutron should decay into an antiproton, a positron and a neutrino in a process analogous to the beta decay of free neutrons.

Since the antineutron is electrically neutral, it cannot easily be observed directly. Instead, the products of its annihilation with ordinary matter are observed. In theory, a free antineutron should decay into an antiproton, a positron and a neutrino in a process analogous to the beta decay of free neutrons.Electric charge: 0

Since the antineutron is electrically neutral, it cannot easily be observed directly. Instead, the products of its annihilation with ordinary matter are observed. In theory, a free antineutron should decay into an antiproton, a positron and a neutrino in a process analogous to the beta decay of free neutrons.Electric charge: 0Composition: 1 up antiquark, 2 down antiquarks