Particle Identification Prelab Assignment


Name:_______________________________ ID Number:__________________

 

Go to http://www.physics.smu.edu/~sdalley/particlelab/home.html and read the Introduction and The Detector and How to Identify Particle Physics Events. Do at least Part 1 of the tutorial.

  1. Fill in the table below with the names or symbols of the known elementary particles. (You need not list particles and anti-particles separately, e.g. just list W rather than W+ and W-.

 

Matter

Force Carrier

Quarks

Leptons

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  1. Using the conversion factors for energy 1 GeV = 1.6 x 10-10 J and for momentum 1 GeV/c = 5.3 x 10-19 kg m/s, convert the following into GeV (note GeV/c units for momentum are often abbreviated to just `GeV’)

 

(a)    3.6 x 10-9 J                                                   Ans:

 

 

(b)   2.7 x 10-18 kg m/s                                        Ans:

 

 

 

 

  1. (a) Which is the only type of elementary particles that usually makes it through to the outermost detector of the OPAL  experiment?

 

 

 

 

(b) Describe in one sentence what the innermost detector of the OPAL experiment records.

 

 

 

 

 

(c) Which type of elementary particle usually loses all its kinetic energy in the electromagnetic calorimeter?

 

 

 

(d) What 3 criteria can be used to identify hadron particles that are composed of elementary quarks and gluons?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Go to the lab