Description

The gundamCalcXsec app is an interface to the FitterEngine which is in charge of performing a Cross Section calculation by taking the output of gundamFitter as input.

Usage

Similarly to gundamFitter, gundamCalcXsec takes a config file as input with -c but in addition it also takes the output of gundamFitter as an input with the -f argument.

gundamCalcXsec -c path/to/xsecconfig.yaml -f path/to/outputfit.root - path/to/output.root -t 12

Where -o and -t are the arguments for the output file path and the number of parallel threads respectively.

In addition one can use -n and -s to specify the number of toys and to set a random seed respectively in the fit.

gundamCalcXsec -c path/to/xsecconfig.yaml -f path/to/outputfit.root - path/to/output.root -t 12 -n 100 -s 5

Trigger options

A certain number of trigger options can be used depending on what the user needs:

Option	Description
-d	Only overrides fitter config and prints it.
-use-bf-as-xsec	Use best-fit as x-sec value instead of mean of toys.
–use-prefit	Use prefit covariance matrices for the toy throws.

For a complete list of options run command without arguments.

Config options

Option	Type	Description	Default
fitterEngineConfig	json	FitterEngine config
minGundamVersion	string	gundamFitter will stop if the version is lower
outputFolder	string	Folder where the output file is written	./