2023:groups:smhiggs:higgs-cell-resample:start
Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision | ||
|
2023:groups:smhiggs:higgs-cell-resample:start [2023/06/16 11:46] stephen.jones |
2023:groups:smhiggs:higgs-cell-resample:start [2023/06/18 16:23] (current) stephen.jones |
||
|---|---|---|---|
| Line 1: | Line 1: | ||
| - | ===== Negative Weight Mitigation 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 11: | Line 19: | ||
| * Can narrow weight distribution for more efficient event unweighting | * Can narrow weight distribution for more efficient event unweighting | ||
| - | == 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: should there be a bias towards positive values (since you iteratively add nearest event until wi>=0)? | |
| - | - q: metric needs to be compatible with how ps generator is populating ps, proof that this is not biasing anything? | + | - ps generator dependent because this alters which events are clustered, can this have an impact on the physics? |
| - | - q: should there be a bias towards positive values (since you iteratively add nearest event until wi>=0)? | + | * Q: plotting statistical uncertainties on the original sample |
| - | * ps generator dependent because this alters which events are clustered, can this have an impact on the physics? | + | - more easily allows verifying that differences are within statistical uncertainty |
| - | + | * Q: on which type of event does this have the biggest impact? | |
| - | - q: plotting statistical uncertainties on the original sample | + | - imagine reals are more impacted than virtual |
| - | * more easily allows verifying that differences are within statistical uncertainty | + | - 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: on which type of event does this have the biggest impact? | + | - we do not alter any of the event kinematics |
| - | * imagine reals are more impacted than virtual | + | - there is no cross talk of events separated by more than the maximum allowed distance |
| - | * we were completely agnostic | + | - 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: can we really prove that this does not alter distributions? (prove that you preserve distributional structure of the observables you compute) | + | - we have plots that we can examine |
| - | * we do not alter any of the event kinematics | + | |
| - | * 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? | + | |
| - | + | ||
| - | - q: mean/median/width of the cell resampling bins | + | |
| - | * we have plots which 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.1686908766.txt.gz · Last modified: 2023/06/16 11:46 by stephen.jones
Page Tools
Except where otherwise noted, content on this wiki is licensed under the following license: Public Domain
