(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Consider the particle decay:

A0 → p + (pi)−

(a) In the rest frame of the A0 particle, calculate the momentum of the p and of the (pi)−

(express the answer in MeV/c).

(b) In the rest frame of the A0 the p and (pi)− emerge back to back. Suppose now that

the A0 is not at rest but is travelling such that it has a total energy of 2000 MeV

as observed by a stationary observer. If a large number of A0 decays was observed,

calculate the minimum and maximum proton momentum that this observer would

expect to see in his/her frame of reference.

2. Relevant equations

Particle Masses (MeV/c2):

(Not sure what its called) A0 = 1116

(pi minus) pi− = 140

(proton) p = 938

(K minus) K− = 494

this may be of use: E^2 = p^2*c^2 + m^2*c^4

3. The attempt at a solution

for part a) i put into the above equation E=1116 MeV/c^2(mass of parent particle) and m^2*c^4 = 140 + 938 MeV/c^2. Rearranged equation so its in terms of p and the ceclulated that. Im not 100% on this though so any help would be good. Part b) not very sure at all, i dont really understand the question to be honest. sorry the quesiton might be hard to understand, only my first post. thanks for any help!

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# Homework Help: Particle/High energy physics question

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