Slide 1: title, HiggsBounds manual reference : arXiv:0811.4169 [hep-ph] and web-site : http://www.ippp.dur.ac.uk/HiggsBounds Slide 2: outline: motivation / implementation / usage and applications Slide 3: heading "motivation" Slide 4: motivation for Higgs search, LEP and Tevatron turn(ed) non-observation of Higgs signals into limits on cross sections of individual or combinations of signal topologies Slide 5: Higgs search results, example 1: LEP SM combined limit Definition of S95(mh), "excluded at 95% C.L." and "predicted" and "observed limits". Slide 6: Higgs search results, example 2: LEP single topology limits ee -> HZ, H -> bb and H -> tau tau Slide 7: Higgs search results, example 3: LEP single topology limits ee -> H2 H1, H1 H2 -> bbbb and H2 H1 -> H1 H1 H1 -> 6 taus, Definition of S95(mh1,mh2) Slide 8: Higgs search results, example 4: Tevatron SM combined limit Slide 9: Higgs search results, example 5: Tevatron single topology limits pp -> H -> WW -> l nu l nu (cross section ratio limit), pp -> H -> tau tau (absolute cross section limit) Slide 10: why HiggsBounds? Slide 11: what is HiggsBounds? Slide 12: heading "implementation" Slide 13: basic idea: for each topology of an analysis X evaluate Q_model(X) and compare it to Q_observed(X). If Q_model(X) > Q_observed(X) then the model is excluded by this analyses at 95% C.L. (for limitations of this statement read the paper) Problem: how to combine search results without losing the 95% C.L.? Slide 14: How to preserve the 95% C.L. limit: obtain Q_expected(X) for each analysis, determine analyses X0 with highest sensitivity for the signal, use only the criterion Q_model(X0) > Q_observed(X0) for exclusion Slide 15: implemented LEP analyses (version 1.2.0) Slide 16: implemented Tevatron analyses (version 1.2.0), single topology analyses Slide 17: implemented Tevatron analyses (version 1.2.0), SM combined analyses Slide 18: Input required by HiggsBounds for input option effC ("effective couplings") Slide 19: model predictions calculated from this input: LEP examples Slide 20: model predictions calculated from this input: Tevatron example Slide 21: SM ratios of partonic contributions to: single Higgs, HW and HZ production (used in the Tevatron example) Slide 22: Sources of SM normalisation: Higgs decay branching ratios : HDECAY 3.303, Higgs production cross sections : TEV4LHC workshop results Slide 23: heading "usage and applications" Slide 24: usage of the command line version Slide 25: sample output file Slide 26: usage of the fortran subroutine version (input option effC), website of online version: http://www.ippp.dur.ac.uk/HiggsBounds Slide 27: application 1: re-evaluation of SM exclusion with an improved SM cross section prediction improved SM prediction for single Higgs production [Anastasiou, Boughezal, Petriello '08], updated determination of PDFs: MSTW2008 Slide 28: application 1, exclusion curve due to old/improved single Higgs production cross section with MRST2006 and MSTW2008 PDFs (Tevatron analyses of before March 2009) Slide 29: application 1, the same using Tevatron analyses of up to August 2009 Slide 30: application 1, exclusion curve due improved result with MSTW2008 PDFs and PDF uncertainty band displayed (Tevatron analyses of before March 2009) Slide 31: application 1, the same using Tevatron analyses of up to August 2009 Slide 32: application 2: SM versus 4th Generation Model partial decay with Gamma(H -> gg)_model = 9 Gamma(H -> gg)_SM, exclusion plot using LEP *and* Tevatron analyses (before March 2009) Slide 33: application 2, the same using Tevatron analyses of up to August 2009 Slide 34: application 3: MSSM benchmark scenarios, exclusion update comparison for the mh-max scenario in the m_h-tanb plane: published LEP result from 2006 versus HiggsBounds using a new value for m_top and an improved MSSM Higgs mass prediction. The Tevatron exclusion included in the plot. Slide 35: application 3, 2 plots of the m_A-tanb plane: - LEP and Tevatron exclusion using HiggsBounds - channels of highest sensitivity (Tevatron analyses of before March 2009) Slide 36: application 3, the same using Tevatron analyses of up to August 2009 Slide 37: application 4: Randall-Sundrum model, excluded parameter space 2 plots in the m_h-m_phi plane (2 mass eigenstates in the RS model): - LEP and Tevatron exclusion using HiggsBounds, - channels of highest sensitivity (Tevatron analyses of before March 2009 and including the channel ee -> HZ, H -> 2 jets (not yet in the public version)) Slide 38: HiggsBounds: status and outlook Slide 39: summary