In particle physics, a hadron is a subatomic composite particle or anti-particle made of two or more quarks/anti-quarks held together by the strong force. Most of the mass of ordinary matter comes from two hadrons, the proton and the neutron. Hadron is categorized into two families: Baryons and Mesons.
Baryons are made up of
odd numbers of quarks or antiquraks, usually three quarks or three antiquarks. Protons and neutrons are
the examples of Baryons. A proton is made of two up quarks and a down
quark. A neutron is made of two down quarks and an up quark.
Mesons are made up of
even numbers of quarks usually one quark and an anti-quark. Pions and
Kaons are examples of Mesons. A pion is made of one up quark and one
down anti-quark. A kaon is made of one up quark ans one strange
anti-quark.
Hadrons
are also characterized by being affected by the strong nuclear force,
which holds them tightly together over a short distance. At the center
of every atom there is a nucleus which is a cluster of protons and
neutrons, which are two examples of hadrons under baryons family..
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