Matching parameter choice in model without clear transition between multiplicites
Dear experts,
in a model with a BSM Z' (in this case with a mass of 500 GeV) that only couples to bottom quarks, we are trying to establish the appropriate xqcut and qcut parameters. Unlike in examples like https:/
1) the sum of multiplicites is smooth and
2) qcut variations do not further increase the cross section dramatically?
The process is:
define j = j b b~
define p = p b b~
generate p p > zp > j j
add process p p > zp > j j j
add process p p > zp > j j j j
with zp being the particle coupling only to b b~
We use lhapdf 306000
The matching parameters are:
xqcut = 30
maxjetflavor = 5
use_syst=True
JetMatching:qCut = 60 (the variations it automatically added were 90 and 120)
JetMatching:
JetMatching:
SysCalc:
The result is in https:/
The lower edge of the green band is the qcut 90 and the upper edge the qcut 120 version, so by that logic, is xqcut30, qcut90 what we ought to choose?
With kind regards,
Denis
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