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How much kinetic energy take the particles after the collision?

  1. Nov 12, 2013 #1
    1. The problem statement, all variables and given/known data
    What is the minimum amount of kinetic energy of proton that hits another still proton so reaction ##p+p\rightarrow p+n+\pi ^+## is possible? How big part of the initial kinetic energy is used for kinetic energy of new particles?


    2. Relevant equations



    3. The attempt at a solution

    ##T_{min}=292MeV##

    am.... I don't really understand the second question? I calculated the minimum kinetic energy with presumption that ##p+n+\pi ^+## will have no kinetic energy after the collision of protons... So... what exactly answers the second part of this problem? o_O
     
  2. jcsd
  3. Nov 15, 2013 #2

    PAllen

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    You haven't mentioned conservation of momentum.
     
  4. Nov 16, 2013 #3

    PAllen

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    Also, consider the difference between how the collision looks in the COM frame vs. the lab frame. I assume the last question is being asked about the lab frame.
     
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