Madspin: Higgs decay - Branching ratio larger than one for 25
Hi,
I'm trying to generate the process p p > h h [QCD] and let one Higgs decay into two photons (h > a a) and the other into one bottom and one anti-bottom (h > b b~) with MadSpin. I'm able to run the process but I get this warning: "CRITICAL: Branching ratio larger than one for 25".
I'm using the model loop_qcd_
#******
# MadSpin
#
# P. Artoisenet, R. Frederix, R. Rietkerk, O. Mattelaer
#
# Part of the MadGraph5_aMC@NLO Framework:
# The MadGraph5_aMC@NLO Development Team - Find us at
# https:/
#
# Manual:
# cp3.irmp.
#
#******
#Some options (uncomment to apply)
#
# set seed 1
# set Nevents_
# set BW_cut 15 # cut on how far the particle can be off-shell
# set spinmode onshell # Use one of the madspin special mode
set spinmode none
set max_weight_ps_point 400 # number of PS to estimate the maximum for each event
import model loop_qcd_
# specify the decay for the final state particles
decay t > w+ b, w+ > all all
decay t > w- b, w- > all all
decay w+ > all all
decay w- > all all
decay z > all all
decay h > a a [noborn=QED]
decay h > b b~
# running the actual code
launch
#******
Could someone please let me know what I’m doing wrong?
Many thanks!
Luís.
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- Hua-Sheng Shao
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