Antibaryon

Key Stage 5

Meaning

An antibaryon is a hadron consisting of three antiquarks.

About Antibaryons

• The antiparticle counterpart to baryons like protons and neutrons.
• Antibaryons have opposite charge and quantum numbers to their corresponding baryons.
• Studied in high-energy physics experiments to understand matter-antimatter symmetry.
• Antibaryons are created in high-energy particle collisions and cosmic rays.
• Antibaryons annihilate with baryons producing high-energy gamma rays.

The study of antibaryons helps in understanding the fundamental forces in nature.

Antibaryons are affected by the:

• Strong Nuclear Interaction
• Weak Nuclear Interaction
• Electromagnetic Interaction
• Gravitational Interaction

Antibaryon	Antiquark-composition	Charge/e	Strangeness	Baryon Number	Lepton Number
Antiproton	\(\bar{u}\bar{u}\bar{d}\)	\(Q=-1\)	\(S=0\)	\(B=-1\)	\(L=0\)
Antineutron	\(\bar{u}\bar{d}\bar{d}\)	\(Q=0\)	\(S=0\)	\(B=-1\)	\(L=0\)

Examples

• The antiproton (composed of two anti-up quarks and one anti-down quark) is an antibaryon.
• Antibaryons are produced in particle colliders.