User Tools

Site Tools


2019:groups:sm:start

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous revision
2019:groups:sm:start [2019/05/27 11:45]
fawzi.boudjema
2019:groups:sm:start [2019/06/19 10:23]
daniel.maitre
Line 4: Line 4:
        ​*[[2019:​participants:​nlm_s1|Present in Les Houches in session 1]]        ​*[[2019:​participants:​nlm_s1|Present in Les Houches in session 1]]
        ​*[[2019:​participants:​nlm_global|The Global List including all registered participants for the SM WG]]        ​*[[2019:​participants:​nlm_global|The Global List including all registered participants for the SM WG]]
- 
  
 ===TOPICS=== ===TOPICS===
Line 34: Line 33:
     *ntuples for NNLO     *ntuples for NNLO
  
-  ​* **Jets: Where is quark/gluon discrimination useful? ​How does it perform? Examples: ​** +=== Projects === 
-    * PDFs + 
-    * VBF  +Please add your projects/​names to this list 
-    * X->gg + 
-    * Susy cascades +  ​[[ NNLO nTuples ]] 
-    * ISR tagging +  ​[[ PDF benchmarking ]] 
-    * W tagging +  ​[[ Photon isolation ]] 
-    * top tagging ​+  * [[ NNLO subtraction prospects for 2 --> 3]] 
 +  * [[ Wishlist update ]] 
 +  * Log(R) study? 
 +  * analytical reconstruction?​ Stability of expressions?​ 
 +  * [[ photon to qqbar splitting]] 
 + 
 +=== Jets === 
 + 
 +We have made a special e-group for anyone who wants to join these discussions[[https://​simba3.web.cern.ch/​simba3/​SelfSubscription.aspx?​groupName=houches-2019-topics-jets|houches-2019-topics-jets]]. ​ There is also a slack channel: [[https://​join.slack.com/​t/​jetsatleshouches2017/​shared_invite/​enQtNjQ5MTQxODc5MTExLWU2OGE3NzUyZWI0YWJlOWYzOTM1Yjc2YTNhYjQzOTJmZjNlYTQ4OTVmMTA2OTIyNWQ2N2Y4NWVlOTZlYjkwZTU|Invite Link]]. In terms of topics, this is what we have brainstormed so far: 
 + 
 +    * **Where is quark/gluon discrimination ​actually ​useful?​** ​One complication is that many other analysis selections are already purifying the selection (e.g. requiring two forward jets with large mjj already suppresses gluon jets for VBF/VBS). Examples: ​ 
 +      * PDFs 
 +      * VBF  
 +      * X->gg 
 +      * Susy cascades 
 +      * ISR tagging 
 +      * W tagging 
 +      * top tagging ​ 
 + 
 +    * **Extraction of the strong coupling constant** ​ This was a main focus of the last Les Houches and we plan on at least having a discussion about this one of the days.  As part of this, we may want to do a short study of the difference between inclusive jets (F. Ringer et al.) and dijets. 
 + 
 +    * **Tuning with jet substructure** One motivation for performing measurements of jet structure is to improve MC tunes. ​ It would be good to understand which observables are actually sensitive to which parameters, taking note of what has already been measured. ​ IRC safe observables may not be so useful for tuning. ​ Another sub-topic: can we understand the ATLAS jet pull angle measurement from the point of view of parameter variations? ​ (quite significant tension between Pythia and data). 
 + 
 +    * **Can grooming reduce non-perturbative effects?** Idea in part suggested by Bogdan Malaescu (see also 1705.07135). 
 + 
 +    * **Tagging** There was a big effort to understand light 2-prong tagging last Les Houches. ​ We could revisit this topic for Higgs and/or BSM (top is already quite well-covered with 1902.09914). 
 + 
 +    * **Various ML4Jets topics**
2019/groups/sm/start.txt · Last modified: 2019/06/19 10:23 by daniel.maitre