How to do local Physics Analysis ?

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  • Thread starter Thread starter welatiger
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SUMMARY

The discussion centers on the feasibility of conducting local physics analysis using the CMS Software (CMSSW) from CERN. It is established that individuals cannot download CMSSW without being part of the CMS Collaboration, and even if they could, access to the necessary data, which amounts to many petabytes, is restricted. To participate in physics analysis, one must join an experiment, contribute financially, and commit time to the collaboration. The only alternative for local analysis involves using individual packages for Monte Carlo data generation, such as LanHep, MadGraph, Pythia, Geant4, ROOT, and accessing limited training data available on the CMS website.

PREREQUISITES
  • Understanding of CMS Software (CMSSW)
  • Familiarity with Monte Carlo simulation tools (LanHep, MadGraph, Pythia)
  • Knowledge of data analysis frameworks (ROOT)
  • Basic concepts of particle physics and experimental collaboration structures
NEXT STEPS
  • Research how to join the CMS Collaboration and the requirements for membership
  • Explore the use of Monte Carlo generation tools like LanHep and MadGraph
  • Learn about data access policies and available datasets on the CMS website
  • Investigate the ROOT framework for data analysis in particle physics
USEFUL FOR

Particle physicists, researchers interested in experimental physics, and individuals looking to engage with the CMS Collaboration for data analysis and simulation tasks.

welatiger
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How to do local Physics Analysis ??

You Know all the LHC machine at CERN, and the CMS detector (Compact Muon Solenoid)

This detector run a CMSSW ( CMS Software ) on CERN machines, can i download that software on my local machine, run it and do physics analysis? if yes how to download it, and what is it's size??

Thank you
 
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No you cannot download it - you are not part of the CMS Collaboration. Second, if you were to download it it would do you no good without the data. This data is many petabytes in size.
 


I think 1-2 older experiments released a part of their source data and analysis software, or plan to do so.
I'm not sure if your local computer can do any interesting analysis - the datasets are smaller than those of current experiments, but they are still large. In addition, it might take some time to get used to the analysis software.
 
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Oh, thank you, I'm really frustrated.
So how to obtain a primary CERN account, Is it necessary to be at CERN office.
 
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You need to join one of the experiments, and you need to put in a certain minimum amount of time - usually a year - doing tasks of general service to the experiment. The experiments have put in literally millions of hours operating, aligning, calibrating, etc. the detectors, and they don't let people say "OK, now that you chumps have done all the hard work, send me the data and I will analyze it." Also, each experiment has a mandated contribution of around 15 kCHF per member per year to the "common fund" to cover consumables like magnetic media for data storage, gas for the detector, etc.
 


So, there is no way to do physics analysis locally expect by using the individual packages, i use for MonteCarlo generation of data (LanHep -> MadGraph -> Pythia -> Geant4 -> ROOT -> Physics Analysis), and there are some real data for training available at the CMS website.

Is that suitable ?
 
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Let me say this again. You will not have access to real data unless you join an experiment.
 

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