1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Particle decay/Four momenta

  1. Mar 26, 2015 #1
    • Member warned about posting with no effort
    1. The problem statement, all variables and given/known data
    A particle of unknown rest mass, M, travelling at an unknown speed, v, decays to an electron, a positron and a photon with the following four-momenta: pe x pe y pe z Ee/c pp x pp y pp z Ep/c pγ x pγ y pγ z Eγ/c
    Write down an expression for M in terms of these four-momenta. These four momenta are measured in a detector (in units of GeV/c) to be, respectively,: 0 50 0 50 , 0 −50 0 50 , 0 0 100 100 where the mass of the electron is neglected.

    2. Relevant equations
    Calculate M and v.

    3. The attempt at a solution
  2. jcsd
  3. Mar 27, 2015 #2


    Staff: Mentor

    Chris T, you need to make some attempt at a solution. To start, you might think about what equations would be relevant. Is there an equation that relates the energy and momentum of a particle with a given rest mass?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted