Particle Physics Questions
Q2.
(a) Hadrons are a group of particles composed of quarks. Hadrons can either be baryons or mesons.
(i) What property defines a hadron?
(ii) What is the quark structure of a baryon?
(iii) What is the quark structure of a meson?
(3 marks)
(b) State one similarity and one difference between a particle and its antiparticle.
(2 marks)
(c) Complete the table below which lists properties of the antiproton.
|
Charge/C |
baryon number |
quark structure |
antiproton |
|
|
|
(2 marks)
(d) The 
is an example of a meson with strangeness –1
It decays in the following way:
(i) State, with a reason, what interaction is responsible for this decay.
(2 marks)
(ii) State two properties, other than energy and momentum, that are conserved in this decay.
(2 marks)
(Total 11 marks)
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