1. Not finding help here? Sign up for a free 30min 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!

Desintegration momentum

  1. Jan 17, 2014 #1
    1. The problem statement, all variables and given/known data

    Given the desintegration of one particle,

    1 -> 2 + 3

    then show that

    p1^2 = p2^2+p3² + 2cos(theta)*p2*p3

    p1: momentum particle to be desintegrated
    p2, p3: momentum of the two resulting particles
    theta: angle between 2 & 3


    2. Relevant equations



    3. The attempt at a solution

    I tried using conservation of quadrivector
     
  2. jcsd
  3. Jan 17, 2014 #2
    I am curious as to why you attempted this via 4-momentum? Is the text you are working with promote that use?

    Anyways, the way I would approach this is a lot simpler, you do not need 4-momentum. Think of this by looking at the conservation of momentum thus,

    P1=P2+P3

    and it follows that taking the inner product leads to

    P1[itex]\cdot[/itex]P1 = P12 = (P2+P3)[itex]\cdot[/itex](P2+P3).

    Leaving the rest to you. Essentially this is the laws of cosines.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Desintegration momentum
  1. Pion desintegration (Replies: 6)

  2. Momentum operator (Replies: 3)

  3. Momentum unit (Replies: 7)

Loading...