Calculating Pion Desintegration Angle & Energy

[atomqwerty]

Homework Statement

A pion that is moving at 0.98c, desintegrates producing two photons that form both of them the same angle with the direction of the initial pion. Find the angle and the enrgy for the photons. (Pion mass: 135 Mev/c²)

Homework Equations

E = K + m₀c²

The Attempt at a Solution

I've found that the energy for the pion is 678,4 Mev. Now if I apply the conservation of energy, (or conservation of momentun), I'm confused, because a photon has no mass, right?

Thanks

 

[Vanadium 50]

Why do you think that equation is relevant? (It's true - but why is it relevant?)

 

[atomqwerty]

Why do you think that equation is relevant? (It's true - but why is it relevant?)

I think that provides the expressionn for the energy for each particle, that wiould be necessary for the conservation of energy. Is that correct?

 

[Vanadium 50]

It's not relevant.

What other equations have you been studying recently?

 

[atomqwerty]

It's not relevant.

What other equations have you been studying recently?

relativistic momentum p = γm₀v

Kinetic energy K = m₀c²(γ²-1)

Equation energy - momentum E²-(cp)² = (m₀c²)²

and I think that's all

 

[Vanadium 50]

OK, so which of these might help?

 

[atomqwerty]

OK, so which of these might help?

Uhm, maybe Equation energy - momentum? Ut can be a problem to be solved with the conservation of momentum/energy...