RE: Citizen science on Hive - exploring a neutrino mass signal at CERN’s Large Hadron Collider

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Oh, this is exciting, something to keep me busy this week-end! 😀

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I hope you will enjoy this episode, and I am looking forward to read your report! ^^

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I started working on it, there was a prompt about the new version of MG5_aMC and I installed the updated version. Is there any chance that it is related to these problems I have encountered:
(1) I couldn't access the diagrams as it says that there were no corresponding html for the Feynman diagrams in the SubProcesses folder of my output folder
(2) After modifying the parameters in the param_card.dat and run_card.dat, I encountered an error upon running the code.

Is the output folder has to be the same folder for generating the simulation events of top-antitop collisions from before?

Thank you. :)

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Mmmh interesting issues. Let's try to fix them together.

(1) I have not updated MG5aMC on my side and it still works like a charm. Can you please share the full MG5aMC history of commands you typed?

(2) Can you share your param_card and run_card with me, as well as details with respect to the error (for instance a copy of the screen output)?

Thanks in advance!

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Here's the output upon launching the MG5aMC after installing the new version:

Screen Shot 2022-07-04 at 11.05.53 PM.png

I was able to load the model and was able to generate the subprocesses (although, I still can't access the diagrams when I try to click the html link)

Screen Shot 2022-07-04 at 11.10.51 PM.png

I launched MG5_aMC and modified the card.dat files:

Neutrino Mass Models-4.jpg

And, here's the compilation error log after trying to run the code:

Neutrino Mass Models-6.jpg

Thank you ! :)

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I was able to load the model and was able to generate the subprocesses (although, I still can't access the diagrams when I try to click the html link)

The fact that you don't have the diagrams is weird, as everything seems to have worked at ths stage. Is there any warning message printed to the screen related to the diagrams? If not, maybe you can check manually where they are.

To this aim, please go to the test_signal/SubProcesses folder (I don’t know if test_signal is the name you choose; if not, please adapt it). There, you should see a few folders starting with P1_ and P2_. There are jpg files in these folders. They include the diagrams.

Does it work?

I launched MG5_aMC and modified the card.dat files:

There is an apparent mistake with the run_card. The PDF-related lines should be lhapdf = pdlabel and 262000 = lhaid (check my version of the run card in the post). This is what causes the compilation failure of MG5aMC.

Un-relately, you have an extra non zero parameter in the paramcard (in the mixing parameters). Also, please don’t forget to set the calculation of the decay width of the heavy neutrino to automatic (auto). I don't know whether you have done it.

Good luck, and please let me know if the comments above help you to fix all issues!

Cheers!

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