MadAnalysis 5

plot of p p > t t~ processus and p p > bb~bb~tt~ .

Asked by Mohamed ouchemhou

Hello Dears,
I have a probleme with the methods of Madanalysis 5, for example ,when i run processes p p > t t~ on the madgraph,I have tired to plot some histogram at Reconstructed objects level,but i am stooped with same error as follow

ma5>import /home/mohamed/MG5_aMC_v3_0_3/ttbar_lo/Events/run_01/tag_1_delphes_events.root as Signal
MA5: -> Storing the file 'tag_1_delphes_events.root' in the dataset 'Signal'.
ma5>set main.stacking_method = normalize2one
ma5>set Signal.type = signal
ma5>plot PT(t[1]) 100 0 200 [logY]
MA5-ERROR: 't' is not a defined (multi)particle.

I don't know how I can define t and t~ with a correct syntax ,this My first question .
My second question is as follow :
when we have a processes like p p > bb~bb~tt~ ,how madanalysis5 organize bb~bb~ at the moment of plotting ?
did consider as a four independent particlue :
plot PT(b[1]) for b
plot PT(b[2]) for b~
plot PT(b[3]) for b
plot PT(b[4]) for b~

Thank you .

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MadAnalysis 5 Edit question
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Solved by:
Jack Y. Araz
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Best Jack Y. Araz (jackaraz) said : 		#1

Hi Mohamed

First of all reconstructed events are final state particles, during the showering process your tops will decay and those final state particles will be reconstructed in delphes. Thus even if you define top (by the way you can define it as;

ma5> define t = 6 6~

) your histogram will be empty since there can not be any tops in the final state. For your second question, during reconstruction some jets are (mis)tagged as b jets, there is no b b~ anymore they are not quarks they are reconstructed jets which are matched with underlying B-hadrons. Thus b[1] means the leading jet which is tagged as b-jet.

plot PT (b[1]) -> plot PT of leading bjet
plot PT (b[2]) -> plot PT of second leading bjet etc.

Cheers
Jack

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Mohamed ouchemhou (mouchemhou) said : 		#2

Hi Jack .
thank you Very much .
cheers
Mohamed

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Mohamed ouchemhou (mouchemhou) said : 		#3

Thanks Jack Y. Araz, that solved my question.