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--- 2017:groups:tools:resonance_aware [2017/06/11 12:17]
emanuele.re
+++ 2017:groups:tools:resonance_aware [2017/06/15 14:02] (current)
emanuele.re
@@ Line 1: / Line 1: @@
 ===== Resonance-aware NLO+PS sub working group =====
-** interested people:** Emanuele, Luca, Ben, Efe, Tomas Jezo, Markus Seidel, Alexander Grohsjean, ADD YOUR NAME HERE
+** interested people:** Emanuele, Luca, Ben, Efe, Tomas Jezo, Markus Seidel, Alexander Grohsjean, Ludovic Scyboz, Philippe G., ADD YOUR NAME HERE
 A discussion is scheduled for Monday morning.
-Possible topics:
+The more recent results from the ongoing (TH) study using the powheg-box-res framework (developed in
+https://arxiv.org/abs/1509.09071 and https://arxiv.org/abs/1607.04538) can be found here (P. Nason talk)
+https://indico.cern.ch/event/596233/timetable/
+Possible topics for LH:
+     * experimental needs
      * availability of benchmarks results
@@ Line 14: / Line 21: @@
      * comparison powheg vs mc@nlo (any news from herwig, or sherpa?)
+------------
+**Discussion on Monday:**
+overview: {{:2017:2017_06_12.pdf |slides }}
+ATLAS perspective: {{:2017:leshouches_atlas_powhegwwbbnlo.pdf | slides}}
+technicalities (bb4l generator):
+   * make sure that numerical accuracy reached in event generation from MC is the same as in TH-paper
+       * possible to have grids from the authors (seems to be a viable solution, as atlas and cms will agree - or already agreed - on the settings)
+       * if grids will be provided, need to agree on parameters to scan upon. It seems that order 20 runs will  be enough (a scan would mostly be done using 5-10 values for mtop, and 2-3 values for hdamp)
+       * It might even be possible to use the powheg reweighting machinery to avoid having to re-run all the grids. This might depend on how far mtop is moved from the central value. T. Jezo and collaborators have tried this. Perhaps it'd be useful to perform a closure-test, but using the outermost mtop values that atlas/cms would use.
+       * this reweighting would miss the mtop dependence in R/B. There exists an experimental facility in powheg, to capture these effects via a reweighting, but it was implemented only for DY, and rarely used. Not clear it would work here.
+[ER: to be continued]

Les Houches

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