I have a mother particle at rest, which decays to a daughter particle. The daughter has mass m, momentum p and energy E and is at an angle θ1.
Now I have to assume that the daughter is emitted at an angle θ2, and the mother is moving along the x axis with velocity βc. I need to find a relation between the two angles, as well as the momentum components of the daughter particle in the second situation.
The Attempt at a Solution
I think I could use this relation to find the relation between the angles. However, I don't know the velocity of the daughter particle in the second situation. I'm missing something
For the momentum components of the daughter particle in the second situation, I am a bit lost. Would I have to be using something like this
and then I guess the momentum would only vary on one axis? I am confused.