MadAnalysis 5

How to make "delta eta" plots... possible bug.

Asked by Will Flanagan

Hi MadAnalysis Team,

How does one make a plot of the scalar difference in pseudorapidity? I would assume this syntax would be dsETA(j[1] j[2]), but there are events where I am sure there should be none. In fact, dsETA(j[1] j[2]) gives me the negative of sETA(j[1] j[2]) for every event. sETA(j[1] j[2]) does look to be the scalar sum of pseudorapidities as it should be, but I haven't confirmed this. Nonetheless, sETA(j[1] j[2]) and dsETA(j[1] j[2]) should not be negatives of each other, except for very special events.

Am I making some simple mistake?

Thanks,
Will

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Launchpad Janitor (janitor) said : 		#1

This question was expired because it remained in the 'Open' state without activity for the last 15 days.

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Will Flanagan (will-flanagan) said : 		#2

I am certain that MadAnalysis is not correctly calculating dsETA(j[1] j[2]).

Could someone from the MadAnalysis team please comment? It may be calculating the vector difference or something else, but I am sure it is not the scalar difference.

Thanks,
Will

Revision history for this message
Launchpad Janitor (janitor) said : 		#3

This question was expired because it remained in the 'Open' state without activity for the last 15 days.

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Benjamin Fuks (fuks) said : 		#4

Bug fixed.

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