Elementary Particles Classification On The Basis Of Mass, Spin And Interaction

1. On the basis of mass.
2. On the basis of spin.
3. On the basis of interaction.

• On the basis of mass

• On the basis of spin

• Bosons
• Fermions

• On the basis of interaction.

• Leptons
• Mesons
• Baryons

1. Leptons:

• Leptons interact through electromagnetic or weak interaction only.
• In strong interaction, leptons do not participate.
• Leptons have spin S = 1/2 .

1. Mesons:

• In reactions, mesons can be created through strong interaction.
• Mesons can decay to other mesons or leptons through weak and EM interaction.

Example:

• Pions can decay through weak interactions

• Pions can also decay through EM interaction

1. Baryons

• Baryons can be produced in reaction through strong interaction.

Example:

Families of Particles

Lepton Family

• Fermion and antifermion have opposite parity
• Spin S = 1/2
• Parity P = +1