How to choose software versions on the MC submission form

The MC submission page has many different software versions available.

If you are generating simulations for a physics analysis which you plan to compare against reconstructed data (for efficiency calculation, amplitude fits, systematic studies, etc...), you need to use the same reconstruction software as was used to reconstruct the data for the results to be comparable. Generally, you will want to use the latest version of the simulation software that is available.

The software versions are accessible near the top of the form, with the drop down menus labeled as the following:

halld_recon version:
halld_sim version:
version Set:

The reconstruction versions used for data have names of the form "recon_[RUN PERIOD]-ver[VERSION NUMBER].[MINOR NUMBER]". You'll want to use the one that corresponds to your data version, with the latest minor number. These software versions have the same reconstruction software used to reconstruct the data, with some minor changes to make them compatible with newer simulation software. There are other software versions used for other purposes.

Here is an example of the drop down menu:

As of September 20, 2020, these are the latest halld_recon versions:

Run Period	halld_recon version
2017-01	recon-2017_01-ver03.3
2018-01	recon-2018_01-ver02.2
2018-08	recon-2018_08-ver02.2