LEP Higgs Working Group OPAL Working Page

A Selection of OPAL Higgs Papers and Physics Notes

The OPAL SM Higgs selection and CL calculation methods has been upgraded between 1999 Moriond EW and Y2K data taking start. The mass reconstruction procedures, jet-pairing method in 4jet channel, and global selection scheme are the same as 189 GeV (1998). In order to become familiar with the details of OPAL analyses, see
• 189 GeV publication, and
• Physics note for ICHEP 2000 Osaka for the analysis upgrade.
  Two changes with respect to 189 GeV paper are 1) Missing energy channel selection was optimised for high mass region, relax preselection and optimise LH-sel for high mass Higgs; 2) CL calculation now use 2D analyses (mass vs LH-sel) for Emis, electron, and muon channel. The selection in the 4-jet channel is the same as 189 GeV, but after selection signal compatibility is checked with mass, b-tag, and other 2 kinematic variables. The compatibility is checked for each Higgs mass tested, and the test-mass dependent compatibility is the final discriminator for the four-jet channel.
  
• For the 5-Sep Y2K LEPC inputs, a short physics note is avaibale from Physics note for 5-Sep LEPC.
• Physics Note for the 3-Nov LEPC
• OPAL's Standard Model Higgs Search letter, published in Physics Letters B.
• OPAL's Non-SM Higgs Searches collective physics note, for the 27 February LEP Jamboree and the 2001 winter conferences. Contains results on the MSSM, H+-, H+- -> W*A, Flavor-blind HZ, Invisible decays, and Higgs to Gamma Gamma.
• These physics notes and papers are also accessible on OPAL's public web server with separate links to the .eps files contained in them. Follow these links for all OPAL papers and preprints and for physics notes.

Links to the Fortran Programs, data files, instructions, and candidate information

• New OPAL inputs containing a preliminary version of the final MSSM CP violating and conserving inputs
• o_inputs251002.tar.gz
LATEST full release of the OPAL SM inputs containing also the tail test inputs
• New OPAL inputs OPAL SM and H->gamma gamma inputs to be submitted to ICHEP02
• Results (Fortran code and histograms) for the July 10 2001 LEP Seminar and Summer 2001 conferences. Includes the published SM inputs, full Y2K hA, H+-, H to gamma gamma, Invisible Higgs, and new Flavor-Independent results. This link includes published results from all LEP1 and LEP2 running.
• Updated 1 November 2000 Detailed information of selected candidates collected in 2000
• Index of links to older versions of the results