- #1
skrat
- 748
- 8
Homework Statement
What is the minimum amount of kinetic energy of electron that hits another electron, so ectra electron-positron pair is produced.
Homework Equations
##p^{\mu }=(E/c,\vec{p})##
The Attempt at a Solution
Before the collision:
##p^{\mu }=(\frac{E_e+m_ec^2}{c},p)##
and after: (not sure but... i guess?)
##p^{\mu }=(\frac{E_1+E_2+2m_ec^2}{c},p_1cos\varphi +p_2cos\theta ,p_1sin\varphi+p_2sin\theta )##
For index 1 the first electron, index 2 the second one which had no kinetic energy before the collision and pair electron-positron with no kinetic energy...
Is that right? Probably not, because I can't find a way to answer the question: minimum amount of kinetic energy...