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Particle Questions that include Feynman Diagrams

Q4.

(a)

(i) How many quarks are there in a baryon? Three

(ii) Hadrons fall into two groups, baryons being one of them. What name is given to the other group of hadrons? Mesons

(iii) What distinguishes hadrons from other particles? They are made up of quarks, they are not fundamental OR they are subject to the strong nuclear force.

(3 marks)

(b)

(i) Give the name of one antiparticle that is also a lepton. postron OR antineutrino OR antimuon

(ii) What distinguishes leptons from other particles?

Leptons experience the weak interaction

(OR do not expresience the strong nuclear force)

(2 marks)

(c) A neutron decays by the weak interaction. Complete the equation.

 

(2 marks)

(d) The Feynman diagram representing electron capture is given below. Complete the labelling of the diagram.

(3 marks)

(Total 10 marks)