Question

What are the two conservation laws relevant to particle interactions in the standard model?

Answer 1

In developing the standard model for particles, certain types of interactions and decays are observed.

The two conservative laws relevent to particle interactions in the standard model are :-

Conservation of Baryon Number:

The law of conservation of baryon number states that the baryon number on the reactants and products side must be equal.A baryon is a particle made up of three quarks. This includes protons, neutrons and their antiparticles, the antineutron and the antiproton. The proton and neutron get a baryon number of +1 while their antiparticle counterparts get a baryon number of -1. All other particles get a baryon number of 0.

Conservation of Lepton Number:

The law of conservation of Lepton number states that the sum of lepton numbers before and after the interaction must be the same. There are three different lepton number: -

The electron-lepton number , the muon-lepton number , and the tau-lepton . In any interaction, each of these quantities must be conserved separately.