Feature/acastill lightpropagation update

[asanchezcastillo]

Description

This PR does:

• Modify the standard MC workflow to add lightpropagationcorrection module to the default chain.
• Clean up and factorization of the lightpropagationcorrection module.
• Include the particle propagation time calculation. This is saved as an attribute of the CorrectedOpFlashTiming object. This is required for downstream correction (more information here)

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$${\color{blue}\bf{\textrm{IMPORTANT UPDATE Feb 2nd 2026:}}}$$ If you are making a PR which is intended as a patch for the CURRENT production for gen 2 SBND analyses, you must make two PRs: one for develop and one for the production/sbnd-gen2 branch.

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Checklist

• Added at least 1 label from available labels.
• Assigned at least 1 reviewer under Reviewers,
• Assigned all contributers including yourself under Assignees
• Linked any relevant issues under Developement
• Does this PR affect CAF data format? If so, please assign a CAF maintainer (PetrilloAtWork or JosiePaton) as additional reviewer.
• Does this affect the standard workflow?
• Is this PR a patch for the ongoing production? If so, separate PR must also be made for production/v10_06_00 branch!

Relevant PR links (optional)

Does this PR require merging another PR in a different repository (such as sbnanobj/sbnobj etc.)?
This PRs should be merged with
SBNSoftware/sbnobj#175
SBNSoftware/sbncode#666
SBNSoftware/sbnanaobj#195

Link(s) to docdb describing changes (optional)

Is there a docdb describing the issue this solves or the feature added?

[tjones79]

This looks great thanks @asanchezcastillo

Few minor changes before approval :)

[asanchezcastillo]

Hi @tjones79 ! Thanks for the thorough review. I have implemented the requested changes and the PR should be good to go!

[aantonakis]

Hi @JosiePaton , this PR requires your review since it affects the CAF data format. Just checking if you're available to review this PR soon or if we should reach out to a different CAF expert? thanks

[JosiePaton]

Hi @JosiePaton , this PR requires your review since it affects the CAF data format. Just checking if you're available to review this PR soon or if we should reach out to a different CAF expert? thanks

Hi! @tjones79 is now handling CAF changes for SBND as far as I'm aware, so the comments above should do it!

[aantonakis]

Sorry @JosiePaton and thanks @tjones79 for the review! I will try to get the checklist changed to have @tjones79 under CAF reviewers for the future.

[tjones79]

Thanks for the changes @asanchezcastillo ! Approved :)

[asanchezcastillo]

Adding one last-time commit to fix an issue that I spotted while using the module. The vertex position used for computing particle propagation delays was being taken as the vertex associated to each PFP, instead of the one associated to the neutrino.