Single photon inclusive in mg5amc@nlo
Hi Folks,
I am interested in computing single photon inclusive at NLO in QCD and would appreciate guidance on the setup.
I have in mind the syntax,
generate p p > a j QED=1 QCD =1 [QCD]
At Born- and loop-level, the process is finite and well-defined independent of jet criterion so long as sensible photon cuts are applied, e.g.,
ptgmin = 100
etagamma = 2.4
R0gamma = 0.4
The tree-level process p p > a j j, is what stumps me. Arguable, if one j becomes soft/collinear to j, then the (jj) system is clustered together and everything is hunky dory since IR poles are canceled by counter / loop terms and the Born-like configuration is recovered.
What happens though if one j becomes soft/collinear to a? Technically this is a QED correction to dijet production, but then do I really need to worry about this if I have a sufficiently large set of jet and photon radius parameters? At the moment I am only worried about total normalizations, so I do not mind working with the EW@NLO branch if needed.
Thanks for looking into this!
best,
richard
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- Rikkert Frederix Edit question
- Solved by:
- Richard Ruiz
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