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Particle Physics HW 2 Quiz Name__________________
You can try both problems below, but you will only receive credit for the most correct solution.
1. (10pts) In a 1+2D spacetime (based on SO(1,2) invariance) you have a dual vector with
components 111 and a (1,1)‐tensor with components 1 1 11 1 11 1 1
.
Determine the components of .
Turn over for second problem!!
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2. (10pts) Consider the scattering event → where in the lab frame the incoming
particles are moving at 90o to each other and have equal mass and equal energies .
Afterwards the two outgoing particles have equal mass where . Find the minimum
energy of the incoming particles such that this process can occur. Show your work.