Off shell decay

  1. Hi all,

    I think that the off shell decay dosn't decrease the decay cross section, I mean if a particle X
    decays into a jet pair has mass for example Mjj ~ 130 GeV, being X has mass M ~ 130 GeV so decay
    in resonance or on shell into jj or being MX even much greater ~ 2000 GeV , this won't affect the
    cross section value . So is that right ?

  2. jcsd
  3. mfb

    Staff: Mentor

    I don't understand what you are asking.
    "decrease" the cross-section where, relative to what? "affect" in which way?

    The particle mass influences the cross-section of a 130 GeV process. A particle mass of 130 GeV will lead to a larger cross-section than other particle masses.
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