2023:groups:smhiggs:higgs-cell-resample:start
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2023:groups:smhiggs:higgs-cell-resample:start [2023/06/16 11:48] stephen.jones |
2023:groups:smhiggs:higgs-cell-resample:start [2023/06/18 16:23] (current) stephen.jones |
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| ===== Negative Weight Mitigation (also for Higgs Signal/Background?) ===== | ===== Negative Weight Mitigation (also for Higgs Signal/Background?) ===== | ||
| + | |||
| + | **Code**: [[https://github.com/a-maier/cres|cres]] | ||
| + | |||
| + | == Specific Topics == | ||
| + | * Apply cell resampling ([[https://arxiv.org/abs/2109.07851|paper 1]] [[https://arxiv.org/abs/2303.15246|paper 2]] [[https://github.com/a-maier/cres|source]] [[https://cres.hepforge.org/|binaries]]) to Higgs signal/background (closure tests, measure of simplification e.g. #event reduction) | ||
| + | * Graph of fraction of negative weights for Higgs processes/background (slide 5/9 [[https://phystev.cnrs.fr/wiki/_media/2023:cell_resampling.pdf|Jeppe talk]]) | ||
| + | |||
| + | == Processes == | ||
| + | * di-photon NLO sample (m_gamgam centred around Higgs mass window) | ||
| == General Topics == | == General Topics == | ||
| - | * Graph of fraction of negative weights for Higgs processes/background (slide 5/9 Jeppe talk) | ||
| * Discussion on good metrics (what to compare before considering events close) | * Discussion on good metrics (what to compare before considering events close) | ||
| * Measure the impact on reals vs virtuals, which events are most likely to be altered and by how much? | * Measure the impact on reals vs virtuals, which events are most likely to be altered and by how much? | ||
| Line 12: | Line 20: | ||
| == Talk Discussion (winner: most questions per talk) == | == Talk Discussion (winner: most questions per talk) == | ||
| - | * q: why is w+5 improving more than z+3? | + | * Q: why is w+5 improving more than z+3? |
| - initial event sample size? (no, both have 1e9) | - initial event sample size? (no, both have 1e9) | ||
| - dipole cut vs improvement? (check dipole cut used) | - dipole cut vs improvement? (check dipole cut used) | ||
| - | * q: calculating density of events to "pre-check" that this algorithm may work? | + | * Q: calculating density of events to "pre-check" that this algorithm may work? |
| - | * q: metric needs to be compatible with how ps generator is populating ps, proof that this is not biasing anything? | + | * Q: metric needs to be compatible with how ps generator is populating ps, proof that this is not biasing anything? |
| - | * q: should there be a bias towards positive values (since you iteratively add nearest event until wi>=0)? | + | * Q: should there be a bias towards positive values (since you iteratively add nearest event until wi>=0)? |
| - ps generator dependent because this alters which events are clustered, can this have an impact on the physics? | - ps generator dependent because this alters which events are clustered, can this have an impact on the physics? | ||
| - | * q: plotting statistical uncertainties on the original sample | + | * Q: plotting statistical uncertainties on the original sample |
| - more easily allows verifying that differences are within statistical uncertainty | - more easily allows verifying that differences are within statistical uncertainty | ||
| - | * q: on which type of event does this have the biggest impact? | + | * Q: on which type of event does this have the biggest impact? |
| - imagine reals are more impacted than virtual | - imagine reals are more impacted than virtual | ||
| - we were completely agnostic | - we were completely agnostic | ||
| - | + | * Q: can we really prove that this does not alter distributions? (prove that you preserve distributional structure of the observables you compute) | |
| - | * q: can we really prove that this does not alter distributions? (prove that you preserve distributional structure of the observables you compute) | + | |
| - we do not alter any of the event kinematics | - we do not alter any of the event kinematics | ||
| - there is no cross talk of events separated by more than the maximum allowed distance | - there is no cross talk of events separated by more than the maximum allowed distance | ||
| - IRC safe measure important, but this is not a sufficient condition, can you reproduce infrared sensitive observables (e.g. Sudakov shoulder, 0-bin of ptZ), can your smearing reproduce this feature in the limit that the smearing goes to 0? | - IRC safe measure important, but this is not a sufficient condition, can you reproduce infrared sensitive observables (e.g. Sudakov shoulder, 0-bin of ptZ), can your smearing reproduce this feature in the limit that the smearing goes to 0? | ||
| - | + | * Q: mean/median/width of the cell resampling bins | |
| - | * q: mean/median/width of the cell resampling bins | + | |
| - we have plots that we can examine | - we have plots that we can examine | ||
| - | |||
| - | == Specific Topics == | ||
| - | * Apply cell resampling ([[https://arxiv.org/abs/2109.07851|paper 1]] [[https://arxiv.org/abs/2303.15246|paper 2]] [[https://github.com/a-maier/cres|source]] [[https://cres.hepforge.org/|binaries]]) to Higgs signal/background (closure tests, measure of simplification e.g. #event reduction) | ||
| - | |||
| - | == Processes == | ||
| - | * di-photon NLO sample (m_gamgam centred around Higgs mass window) | ||
| - | |||
2023/groups/smhiggs/higgs-cell-resample/start.1686908881.txt.gz · Last modified: 2023/06/16 11:48 by stephen.jones
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