What are the particles that made baryons like proton and neutron

Quarks

Explanation:

In the standard models, fundamental particles that are the constituents of matter are divided into two groups:

- Leptons: these are particles that do not feel the strong nuclear interaction. Leptons include: electron, muon, tau particle, and the three neutrinos.

- Quarks: these are the particles that interacts via the strong nuclear force. There are six quark flavours: up, down, charme, strange, top, bottom.

Quarks do not appear in nature as individual particles, but always inside more composite particles, namely:

- Mesons: these particles consist of a pair of quark and antiquark.

- Baryons: these particles are made of 3 quarks or 3 antiquarks.

Protons and neutrons are also baryons. In particular:

- A proton consists of 2 quarks up and 1 quark down

- A neutron consists of 2 quarks down and 1 quark up