ME-MC%20comparison

1
ME-MC comparison

• Standard Inputs so far
• ALPGEN
• GRAPPA
• MadGraph
• Generated processes
• ALPGEN (xs by mlm)
• W,Z,DY nj, n0..5
• Wbb,Zbb,DYbb nj, n0..3
• GRAPPA
• W,Z nj, n0..2
• W3j available, xs by S. Tsuno
• Wbb 0j, xs by S. Tsuno
• MadGraph
• W,Z nj, n0..3
• Wbb,Zbb nj, n0..1

2
Summary of Results

• Wn jets
• MGltAL by (0.5,3,5,6) n0..3
• GR AL agree
• Zn jets
• Everything OK
• Wbbn jets
• MGgtAL by (6, 2) n0..1
• GR AL agree for n0
• Zbbn jets
• MGgtAL by (8, 6) n0..1

3
Conclusions

• Need to understand differences between ME-MCs
• Study relative fractions by subprocesses
• Compare kinematic distributions
• Communication with authors
• Work in progress
• Generate remaining processes
• CompHEP tunning
• Shower -gt Ntuples-gtkinematic distributions
• Get NLO rates from MCFM