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About pi-N scattering

  1. Jun 2, 2015 #1
    Pi-N scattering is useful for research on neucleon resonance.But pi meson is not stable,how could it be controled to collide with a neucleon?

    While,virtual photon is also used to excite neucleon,it is internal line particle,which is determined by a reaction,so how hard could it be controled accurately?
     
  2. jcsd
  3. Jun 2, 2015 #2
    Sorry ,there is some error in my operation,I want to delate one of them.
     
  4. Jun 2, 2015 #3

    ChrisVer

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    Pi-N scattering in which experiment?
    For example you can get pi-N scattering by placing some "target" near the creation of the pion.... (in fact a relativistic charged pion=momenta over some ##m_\pi##'s, can travel for some meters before decaying. A momentum p~1GeV~10##m_\pi## would bring the pion to travel for about L~80meters before decaying)
     
    Last edited: Jun 2, 2015
  5. Jun 2, 2015 #4

    vanhees71

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    2016 Award

  6. Jun 2, 2015 #5

    ChrisVer

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    I happened to ask for a confirmation (which I got) yesterday about the formula I had deduced for a similar scenario:
    https://www.physicsforums.com/threads/tau-momentum-for-decay-length.816902/
    in that formula you could solve for [itex]l_{lab}[/itex] instead of momentum (you can try different momenta [itex]p[/itex]) and [itex]m[/itex] the mass of the pion. The lifetime is given in Vanshee's post above.
     
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