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!

Alpha_s calculation

  1. Mar 2, 2007 #1
    Hi!
    Any idea of how to calculate alpha_s (strong coupling constant) from jet multiplicities, that means using (1+1) and (2+1) jet events rates???
    Thanks
     
  2. jcsd
  3. Mar 4, 2007 #2
    Think about the Feynman diagrams which make up the processes. At leading order the 2 jet rate is has two quarks in the final state, while the 3 jet rate has 2 quarks and a gluon. The gluon is radiated from a quark line, so there will be an extra factor of alpha_s.
     
  4. Mar 6, 2007 #3
    As I have found, the amplitude for e+e- --> q _q would be (see attach)...
    Maybe any other resource or book where I could find the calculations for e+e- --> q _q g
     

    Attached Files:

    • 2.JPG
      2.JPG
      File size:
      12.1 KB
      Views:
      41
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Alpha_s calculation
  1. QED Calculations (Replies: 6)

  2. Calculation of flux/ (Replies: 6)

  3. Fusion calculation (Replies: 7)

  4. Calculate PKA velocity (Replies: 2)

Loading...