Particle Physics Questions
Q11.
(a) Complete the table comparing some of the properties of the positive pion, π+, and the proton
Name |
π+ |
Proton |
Relative charge |
+1 |
|
Baryon number |
|
|
Quark composition |
|
|
(b) When a positive pion interacts with a proton, a kaon can be produced, along with another strange particle, as shown in this equation
What type of interaction is shown in this equation?
(1mark)
(c) Deduce the relative charge, baryon number and strangeness of particle X.
(3marks)
(d) Particle X can decay to produce a neutron and positive pion as shown in this equation
What type of interaction is shown in this equation?
(1mark)
(e) Explain your answer.
(2 marks)
(f) The neutron and positive pion will then decay. The positive pion can decay into a positron and an electron neutrino.
Write down the equation for the decay of the neutron.
(2 marks)
(g) Explain why no further decays occur.
(2 marks)
(Total 16 marks)
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