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: Finding cross sections for top quark production

  1. Nov 10, 2015 #1
    1. The problem statement, all variables and given/known data
    The problem asks me to find [itex]\frac{d\sigma}{dz}[/itex] for [itex]u\bar{u} \rightarrow t\bar{t}[/itex] via the strong interaction and then to find the total cross section via QCD. I'm wondering what the difference is? I was just going to write the feynman rules for QCD to get the amplitude and subsequently the cross section. How will this look different finding it via the strong interaction?

    2. Relevant equations
    [itex]u\bar{u} \rightarrow t\bar{t}[/itex]
    [itex]\frac{d\sigma}{dz}[/itex]

    3. The attempt at a solution
    Feynman rules for QCD to get amplitude then cross section
     
  2. jcsd
  3. Nov 11, 2015 #2

    mfb

    User Avatar
    2017 Award

    Staff: Mentor

    The difference is not the strong interaction (both parts use it), the difference is the total cross-section.

    There are higher-order processes but I guess you have to consider leading order only here.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Loading...