1 / 12

Higgs Physics with ATLAS

Higgs Physics with ATLAS. Arno Straessner Journée de réflexion du DPNC 14 septembre 2007. Δχ 2. M H /GeV. 60 Secs Commercial Break. theory. experiment. λ H. V( Φ H ). ...soon at the LHC. Light. Standard Model Higgs - Production and Decay. the easiest: H →ZZ →4ℓ

kylar
Download Presentation

Higgs Physics with ATLAS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Higgs Physics with ATLAS Arno Straessner Journée de réflexion du DPNC 14 septembre 2007

  2. Δχ2 MH/GeV 60 Secs Commercial Break theory experiment λH V(ΦH) ...soon at the LHC Light

  3. Standard Model Higgs - Production and Decay

  4. the easiest: H→ZZ →4ℓ the low-mass signal: H→γγ Search Channels four high pT leptons and Z mass constraint 1% mass resolution 10 fb-1 background from sidebands

  5. in the most promising mass range: VBF qq → V*V*qq → Hqq → WWqq / ττqq Search Channels 1 fb-1 1 fb-1 forward jet tagging central jet veto → reduced background 30 fb-1 10% mass resolution

  6. SM Higgs Mass Reach at LHC most interesting mass range → many channels to combine! careful with NLO corrections to gg→H → reduced significance

  7. background and reconstruction studies → discovery! Strategy for First Data

  8. in SM: Higgs is 0++ measure spin and CP in H decay easiest in H→ZZ →4ℓ Higgs Spin and CP mass of off-shell Z

  9. ZZ decay plane correlations for 100 fb-1 with complete detector simulation Higgs Spin and CP decay plane angle + fermion angle in Z rest frame CP- CP+

  10. measurement of H→ZZ couplings spin-0 case: Higgs Spin and CP Re(C) SM CP- CP+ A

  11. quick overview of SM Higgs search 5 sigma significance possible with 10 fb-1 over wide mass range (MH>130 GeV) low mass region needs more luminosity: ~ factor 2-3 spin and CP structure can be determined in H→ZZ (and also in VBF) some more data will be needed in the meantime: try to prepare analysis as realistic as possible refine search methods new statistical procedures (beyond LEP) we will find the Higgs – if it’s there... Summary and Outlook

  12. possible in VBF Higgs Spin and CP Spin 0 CP +1 non-SM coupling in ZZ →H Δφof tag jets

More Related