2015:groups:higgs:pseudoxsecs
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2015:groups:higgs:pseudoxsecs [2015/06/16 11:41] frank.tackmann |
2015:groups:higgs:pseudoxsecs [2015/07/14 08:23] (current) philippe.gras Added instructions for CERN account |
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| - | ====== Discussion on Pseudo Observables/Cross Sections for Higgs Measurements ====== | + | ====== Discussion on Pseudo Observables/Simplified Cross Sections for Higgs Measurements ====== |
| - | //If you are interested in contributing, please sign up [[2015:groups:topicsignup:pseudoxsecs|here]].// | + | //If you are interested in contributing please subscribe to the [[https://e-groups.cern.ch/e-groups/EgroupsSearch.do?searchValue=houches-2015-topics-higgs-simplified-xsection|mailing list]]. You will be asked to log in with your CERN account. If you don't have a CERN account, please fill [[https://account.cern.ch/account/Externals/RegisterAccount.aspx|this form]] to create a lightweight account.// |
| //This twiki page is closed -- session 2, we welcome your comments, and in particular suggestions on the BSM-motivated regions including proposals for the "BSM jokers" [[2015:groups:pseudoxsecsBSM|here]].// | //This twiki page is closed -- session 2, we welcome your comments, and in particular suggestions on the BSM-motivated regions including proposals for the "BSM jokers" [[2015:groups:pseudoxsecsBSM|here]].// | ||
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| + | //[Update]//: For an overview talk with some more details see [[https://indico.cern.ch/event/399923/session/3/contribution/20/material/slides/0.pdf|here]] (corresponding to 2nd iteration below). | ||
| ==== Goal: ==== | ==== Goal: ==== | ||
| - | Define "pseudo-cross sections" as general framework for Higgs measurements and combination of decay channels. | + | Define "simplified cross sections" as general framework for Higgs measurements and combination of decay channels. |
| * Provide "measurement interface" between raw experimental categories and final interpretation. | * Provide "measurement interface" between raw experimental categories and final interpretation. | ||
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| * Can then be interpreted in SM (analogous to current mu fits) or different BSM scenarios (Higgs-EFTs or specific models) | * Can then be interpreted in SM (analogous to current mu fits) or different BSM scenarios (Higgs-EFTs or specific models) | ||
| - | ==== Guiding principles for definition of pseudo-cross sections: ==== | + | ==== Guiding principles for definition of simplified cross sections: ==== |
| * Should be reasonably well constrained/measured | * Should be reasonably well constrained/measured | ||
| * Important to think which phase-space regions are important to separate out from the theory side | * Important to think which phase-space regions are important to separate out from the theory side | ||
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| == Notes: == | == Notes: == | ||
| - | * Does not replace measurement of fiducial/differential cross sections in gammagamma and | + | * Does not replace measurement of fiducial/differential cross sections in gammagamma and ZZ |
| * Allows maximizing experimental sensitivity, e.g. can still use MVA-based selections, ... | * Allows maximizing experimental sensitivity, e.g. can still use MVA-based selections, ... | ||
| * Still important to ensure that MVAs do not introduce uncontrolled theory systematics (e.g. check which phase space regions get selected) | * Still important to ensure that MVAs do not introduce uncontrolled theory systematics (e.g. check which phase space regions get selected) | ||
| - | * Some of the observables might also be | + | * Some of the (pseudo)observables might also be |
| * limits | * limits | ||
| * asymmetries | * asymmetries | ||
| * continuous parameters for kinematic deviations (e.g. CP odd admixture) | * continuous parameters for kinematic deviations (e.g. CP odd admixture) | ||
| * Definition can evolve | * Definition can evolve | ||
| - | * Can split into more fine-grained pseudo-cross sections once statistics allows (previous measurements remain useful) | + | * Can split into more fine-grained bins once statistics allows (previous measurements remain useful) |
| == Specific points for further discussion: == | == Specific points for further discussion: == | ||
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| ==== 1st iteration ==== | ==== 1st iteration ==== | ||
| - | of possible pseudo-cross sections (in the following "bins"), to be continued ... | + | of possible cross sections (in the following "bins"), to be continued ... |
| For 2nd iteration: Reduce number of bins, classify according to importance/feasibility | For 2nd iteration: Reduce number of bins, classify according to importance/feasibility | ||
2015/groups/higgs/pseudoxsecs.1434447701.txt.gz ยท Last modified: 2015/06/16 11:41 by frank.tackmann
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