2.5 - Conservation rules

Question 1

what is conserved in all interactions

Answer 1

Charge (energy)

Baryon no

lepton no. (specific to the leptons)

mass

energy

momentum

Question 2

what is specifically only conserved in strong interactions

Answer 2

strangeness

(hadrons interacting / hardon decaying)

Question 3

explain the productions of π-mesons in the annihilation process of a proton and antiproton

Answer 3

where only 1 corresponding quark and antiquark anhiliate another, leaving 4 quarks, that go off in pairs producing mesons

(usually, they are not corresponding quarks and antiquarks or they would of anhiliate another)