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2015:conveners_april2-pre-meeting [2015/04/02 00:48] fawzi.boudjema created |
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- | ====== April 2, Pre-Meeting ====== | + | ====== April 2 (2015), Pre-Meeting ====== |
- | ====== Issues to be disccussed ====== | + | ====== Issues to be discussed ====== |
**Joey** | **Joey** | ||
Hi. I wanted to share with the conveners some ideas for studies to be done before, at and after Les | Hi. I wanted to share with the conveners some ideas for studies to be done before, at and after Les | ||
- | Houches | + | Houches that will have an impact not only on SM physics but on BSM as well. For that reason, and for the |
- | that will have an impact not only on SM physics but on BSM as well. For that reason, and for the | + | |
reason that we would like to have more continuity between the 1st and 2nd sessions, I am sending this | reason that we would like to have more continuity between the 1st and 2nd sessions, I am sending this | ||
to the complete list of conveners. The list of ideas below is incomplete, so other ideas are welcome. | to the complete list of conveners. The list of ideas below is incomplete, so other ideas are welcome. | ||
Line 84: | Line 83: | ||
theory variations on. | theory variations on. | ||
+ | **Sasha** | ||
+ | I would add couple of more related issues might be important for | ||
+ | the Higgs production generation: | ||
+ | |||
+ | 1. we know from the last Les Houches 2013 how big was a difference between | ||
+ | generator predictions of gg->h+2jets passing VBF h selections. The | ||
+ | proposal they made was to use in data the gluon initiated process and | ||
+ | check data with the different MC. I have discussed it a bit with | ||
+ | Frixione and looks like tt+jj with VBF selected jets may be a good | ||
+ | benchmark for Monte-Carlos. | ||
+ | |||
+ | 2. Z+b(b) production important benchmark for SUSY H+b(b). Both ATLAS and | ||
+ | CMS 8 TeV analyses see the pTZ a bit harder than LO/NLO+PS predictions | ||
+ | see slide 22 of this talk for example: | ||
+ | |||
+ | http://indico.cern.ch/event/331452/session/4/contribution/25/material/slides/1.pdf | ||
+ | |||
+ | We see with MG5_aMC@NLO that Higgs pT in H+b(b) is sensitive to the | ||
+ | shower scale. So tuning it with Z+b(b) data may help to descrive properly | ||
+ | Higgs pT in H+b(b). | ||
+ | |||
+ | **Josh** | ||
+ | CMS has produced/is producing large sets of events for ttbar+0,1,2j NLO with mg_aMC@NLO+pythia8 (FXFX merging) at both 8 and 13TeV. Since that is quite CPU intensive we can provide the lhe files if we have some common space somewhere where I can put them. | ||