Okay, but what about my first example then? Can I use
(E_A + m_B, p_A)^2 = (m_C, 0)^2
then with the same reasoning to calculate the needed momentum of particle A, and if so, why don't I get the same result if I use pure energy conservation laws?
Hello.
I have a problem that is making me crazy. Consider the following collision
A + B \rightarrow C
which results in both particles (A and B) being destroyed and C being created.
I know the rest mass of all particles. Also, in the lab system, B is stationary and A is moving toward...