Just like mass and charge, each particle has a quantity called “Lepton Numberâ€. The table below gives charge and Lepton number of some particles. Like charge, lepton number should be conserved in any physical process.
((proton(p)--charge--(+e): lepton number--(0))
((neutron(n)--charge--(0): lepton number--(0))
((electron(e^-)--charge--(-e): lepton number--(+1))
((positron(e^+)--charge--(+e): lepton number--(-1))
((neutrino(v)--charge--(0): lepton number--(+1))
((antineutrino(v bar)--charge--(0): lepton number--(-1))
Q1. The Lepton number of 14C (Z=6, N=8) is
(a) +2 (b) -2 (c) 14 (d) 0
Q-2 Which of the following processes is possible on the basis of conservation laws?
(a) P+e-+v → n (b) p →e+v (c) p+e- →n + v bar (d) p + e- →n + v
-
UP 0 DOWN 0 0 0
