feat(gsoc): Negative Weights by Saptaparna · Pull Request #1820 · HSF/hsf.github.io

Saptaparna · 2026-01-30T01:24:51Z

PR for two projects on negative weight mitigation.

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Saptaparna · 2026-01-30T01:25:53Z

@graeme-a-stewart @eduardo-rodrigues Tagging admins

Saptaparna · 2026-01-30T01:31:11Z

@simonspa

Saptaparna · 2026-01-30T01:54:26Z

label:"GSoC"

maszyman

Thanks for the proposals.

Please have a look at my comments inline.

Also, please consider adding AI policy, for example as suggested in #1804 (comment)

maszyman · 2026-01-30T09:34:15Z

_gsocproposals/2026/proposal_NegativeWeightsATLAS.md

This does not seem to be needed. Please have a loot at template in e.g. #1804

maszyman · 2026-01-30T09:36:32Z

_gsocproposals/2026/proposal_NegativeWeightsATLAS.md

This should correspond to the project that needs to be defined in _gsocproject/2026/. We already have there ATLAS is that what this proposal targets.

Suggested change

project: Negative weight, ATLAS event generator workflows

project: ATLAS

maszyman · 2026-01-30T09:38:02Z

_gsocproposals/2026/proposal_NegativeWeightsATLAS.md

This name should correspond to the definition in _gsocorgs/2026. Please check the examples, but you may need to create smu.md in there.

Suggested change

organization: Southern Methodist University

organization: SMU

maszyman · 2026-01-30T09:39:09Z

_gsocproposals/2026/proposal_NegativeWeightsATLAS.md

Please make those arXiv references the clickable links.

maszyman · 2026-01-30T09:39:55Z

_gsocproposals/2026/proposal_NegativeWeightsATLAS.md

Suggested change

* Familiarity with python and C++

* Familiarity with Python and C++

maszyman · 2026-01-30T09:41:44Z

_gsocproposals/2026/proposal_NegativeWeightsATLAS.md

+  * [Saptaparna Bhattacharya](mailto:saptaparna.bhattacharya@cern.ch)
+
+## Links
+  * [Cell resampling](https://cres.hepforge.org/)


This looks to be a Rust project. Would it make sense to add it in requirements?

maszyman · 2026-01-30T09:42:36Z

_gsocproposals/2026/proposal_NegativeWeightsMCFM.md

Same editorial comments as for the previous proposal.

maszyman · 2026-01-30T09:45:40Z

_gsocproposals/2026/proposal_NegativeWeightsMCFM.md

+
+## Expected results
+Release a modified version of MCFM that successfully incorporates the negative weight mitigation strategy, demonstrating reduced statistical dilution.
+


You are missing Mentors section (should be done via project_mentors in the metadata at the top).

If you are the only mentor also for this project, please consider adding a co-mentor as Google suggests that mentors should mentor 1 contributor project, and there should be preferably 2 mentors per project.

maszyman · 2026-02-02T13:14:15Z

@Saptaparna could you please update the PR following the comments?

maszyman · 2026-02-04T09:46:45Z

@Saptaparna just a kind reminder to update this PR.

Saptaparna · 2026-02-09T06:05:45Z

@maszyman done!

maszyman

Thanks for the updates. There are still a couple changes needed to properly render the project.

maszyman · 2026-02-09T08:35:36Z

_gsocproposals/2026/proposal_NegativeWeightsATLAS.md

Suggested change

organization: Southern Methodist University

organization: SMU

maszyman · 2026-02-09T08:35:56Z

_gsocproposals/2026/proposal_NegativeWeightsATLAS.md

Suggested change

project: Negative weight, ATLAS event generator workflows

project: ATLAS

maszyman · 2026-02-09T08:36:55Z

_gsocproposals/2026/proposal_NegativeWeightsATLAS.md

Suggested change

-

---

maszyman · 2026-02-09T08:39:30Z

_gsocproposals/2026/proposal_NegativeWeightsATLAS.md

Suggested change

project_mentors: Saptaparna Bhattacharya (saptaparnab@smu.edu) and authors of the "cell-resampling" team (Jeppe Andersen(mailto:eppe.andersen@durham.ac.uk) and Andreas Maier(mailto:andreas.martin.maier@desy.de))

project_mentors:

- email: saptaparnab@smu.edu

first_name: Saptaparna

last_name: Bhattacharya

organization: SMU

is_preferred_contact: yes

and similarly for the co-mentors

maszyman · 2026-02-09T08:40:09Z

_gsocproposals/2026/proposal_NegativeWeightsATLAS.md

Suggested change

## Mentors

* [Saptaparna Bhattacharya](mailto:saptaparna.bhattacharya@cern.ch) and authors of the "cell-resampling" team (Jeppe Andersen(mailto:eppe.andersen@durham.ac.uk) and Andreas Maier(mailto:andreas.martin.maier@desy.de))

This is handled by project_mentors metadata

maszyman · 2026-02-09T08:41:14Z

_gsocproposals/2026/proposal_NegativeWeightsMCFM.md

Suggested change

project: Negative weight, MCFM

project: MCFM

and please add MCFM.md to _gsocprojects/2026/

maszyman · 2026-02-09T08:41:27Z

_gsocproposals/2026/proposal_NegativeWeightsMCFM.md

same comment as previous proposal

Saptaparna · 2026-02-09T14:31:16Z

AI policy is now there too.

Updated organization details and mentor organization.

maszyman · 2026-02-10T13:47:40Z

Thanks @Saptaparna , I've made few adjustments, but I think now it's ready.

Negative Weights

c8e5d74

Saptaparna changed the title ~~Negative Weights~~ feat(gsoc): Negative Weights Jan 30, 2026

Saptaparna marked this pull request as draft January 30, 2026 01:50

Saptaparna changed the title ~~feat(gsoc): Negative Weights~~ feat(gsoc): Negative Weights label:"GSoC" Jan 30, 2026

Saptaparna changed the title ~~feat(gsoc): Negative Weights label:"GSoC"~~ feat(gsoc): Negative Weights Jan 30, 2026

Saptaparna marked this pull request as ready for review January 30, 2026 01:54

maszyman added the GSoC Related to Google Summer of Code activity label Jan 30, 2026

maszyman requested a review from a team January 30, 2026 09:24

maszyman requested changes Jan 30, 2026

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Update

6085714

Saptaparna added 3 commits February 8, 2026 23:47

Addressing comments

5ebce2e

Addressing comments

565140c

Addressing comments

a75632f

maszyman requested changes Feb 9, 2026

View reviewed changes

Addressing comments

89af048

Saptaparna and others added 6 commits February 9, 2026 23:46

Addressing comments

897f869

Addressing comments

e787539

Update title for Negative Weights MCFM proposal

603e238

Update title for NegativeWeightsATLAS proposal

d3c45af

Update organization field for project mentors

1bd1c5f

Modify organization and mentor details in proposal

92e0a77

Updated organization details and mentor organization.

maszyman approved these changes Feb 10, 2026

View reviewed changes

maszyman merged commit 807d277 into HSF:main Feb 10, 2026
5 checks passed

	project: Negative weight, ATLAS event generator workflows
	project: ATLAS

	organization: Southern Methodist University
	organization: SMU

	* Familiarity with python and C++
	* Familiarity with Python and C++


		## Expected results
		Release a modified version of MCFM that successfully incorporates the negative weight mitigation strategy, demonstrating reduced statistical dilution.

-project_mentors: Saptaparna Bhattacharya (saptaparnab@smu.edu) and authors of the "cell-resampling" team (Jeppe Andersen(mailto:eppe.andersen@durham.ac.uk) and Andreas Maier(mailto:andreas.martin.maier@desy.de))
+project_mentors:
+  - email: saptaparnab@smu.edu
+    first_name: Saptaparna
+    last_name: Bhattacharya
+    organization: SMU
+    is_preferred_contact: yes

	## Mentors
	* [Saptaparna Bhattacharya](mailto:saptaparna.bhattacharya@cern.ch) and authors of the "cell-resampling" team (Jeppe Andersen(mailto:eppe.andersen@durham.ac.uk) and Andreas Maier(mailto:andreas.martin.maier@desy.de))

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maszyman commented Feb 2, 2026

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Saptaparna commented Feb 9, 2026

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