Higgs phenomenology
From Wiki Les Houches 09
Dedicated discussions on recent results and ongoing studies, such as backgrounds (tTbB), effects of strong experimental cuts such as jet veto on K-factors, efficiencies, definition of rapidity gaps etc.
People signed up for this group:
- Carlo
- Bruce
- Sally
- Susan
- Dieter
- Rohini
- Giampiero
- Jon
- Simon
- Markus
- Giacinto
- Matthew
- Stefano
- Stefan
- Ketevi
- Joanna
- Due Ninh
- Sunhao
- Gregorios
- Jeppe
- Radja
- Samir
Main discussions/contributions so far
- review talks by Dieter and Ketevi
- O(alpha) and O(alphas) calculations for Higgs decay to 4 fermions, corrections and discrepancies to HDECAY shown
- Markus, Stefan
- new approach to multi-jet production, for applications such as H+jets
- Jeppe
- exp. study of WH, with H->bb, boosted Higgs, fat jet, subjets
- Giacinto
- extensive discussion on exp. and theo. systematics for Higgs searches, in particular H->WW
- identified need to obtain best possible predictions for tT background in different regions of phase space, such as high and low phi_ll region
- also very important: have such tT predictions for 0,1,>1jet bins
- possible to get gg->WW background at NLO?
- for a H->WW search below mH=150 GeV: would need even better control than what is aimed for now.
- current best predictions of inc. Higgs cross section: scale error -11,+7%, pdf +-9 %.
- Action item: understand where this relatively large pdf error comes from
- Would be nice to get understanding of the presentation of the Tevatron exclusion limit, in particular:inclusion of theo. uncertainties on SM prediction. Should the full band go below 1 for real exclusion?
- Put effort to normalize (and understand in the detail the systematics) the Higgs signal to Z production. See also normalization discussions under Observables.
- To be studied: how much lumi and what level of systematic errors is needed to feed back LHC measurements (Z rapidity etc) into pdf determinations
- Rohini, Bruce, Michael Dittmar, Radja, Joey, Guenther,Sally
- Wbb in the high pT HW region
- ttH developments
- Some of the discussion on Jet Substructure is also relevant.
