MadAnalysis 5

space time position of a particle decay

Asked by rojalin padhan

Dear author,

   Regarding the FAQ https://answers.launchpad.net/madanalysis5/+question/243656, you told that the vertex information is not stored when reading a hepmc file. Is this same for STDHEP file format ?
Is there any development in this regard ?

In Manual there is one method "decay_vertex()", to access space time position. If it works, how can I get the x-component of the position ?

I want to access the space time position of a particle decay using STDHEP file format. Will it be possible for the current version of Ma5.

thanks,
rojalin

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Benjamin Fuks
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Best Benjamin Fuks (fuks) said : 		#1

Hi,

> Regarding the FAQ https://answers.launchpad.net/madanalysis5/+question/243656, you told that the vertex information is not stored when reading a hepmc file. Is this same for STDHEP file format ?
> Is there any development in this regard ?
The information is read from the HEPMC file and can be used in the expert mode. Please see toos/SampleAnalyzer/Process/Reader/HEPMCReader.cpp for more information. There is nothing for the STDHEP format as this information is not stored in the event file.

> In Manual there is one method "decay_vertex()", to access space time position. If it works, how can I get the x-component of the position ?
>
> I want to access the space time position of a particle decay using STDHEP file format. Will it be possible for the current version of Ma5.
This will never be possible. See above.

Regards,

Benjamin

Revision history for this message
rojalin padhan (rossy.mg) said : 		#2

Thanks Benjamin Fuks, that solved my question.