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Single Higgs Study Report: ZH Physics Analysis at Different Energies

This report outlines the study of single Higgs processes within the ZH channel at various energies and Higgs masses, comparing realistic and cheated PFA methods. Current analysis includes Zh→nnh, Zh→qqh, and H→WW modes. Next steps involve investigating differences in PFA methods, studying background processes, and analyzing branching ratios of SM Higgs at different masses.

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Single Higgs Study Report: ZH Physics Analysis at Different Energies

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  1. Status report of ZH Study Jan. 31. 2008 ILC Physics Study WG Meeting Hiroaki Ono Nippon Dental University School of Life Dentistry at Niigata Single Higgs Study

  2. Current status • Mh=120GeV mode is studied using realistic PFA, fixing difference between cheated PFA and realistic PFA, evis, mass etc. • Zhnnh (Ecm=350GeV, Mh=120GeV) 2j • Zhqqh (Ecm=350GeV, Mh=120GeV) 4j • Analizing HWW mode of Zhqqh qqWW • Ecm=350GeV, Mh=160, 140, 120GeV • qq+qq’qq’(6j), qq+lnqq’ (l+4j), qq+lnln(2l+2j) Single Higgs Study

  3. Comparison of realistic/cheated PFA @ Mh=120GeV Higgs mass and visible energy in Zhnnh Real : Mh=118.5 GeV Cheat : Mh=119.1 GeV Satellite hits is included now, but still some difference between them. Now investigating this reason. Single Higgs Study

  4. ZhqqWW channel at Mh=160GeV • 6jets events are analized with cheated PFA. • Chosebest combination by • c2=(Mij-MZ)2/s2Z+(Mkl-MW)2/s2W+(Mmn-MW)2/s2W Cheated PFA Mz(Mjj) Mh(MjjMjj) Single Higgs Study

  5. Next steps • Investigate the difference of realistic and cheated PFA. • Check Zhqqh, hWW mode study is ongoing and check the difference between 120GeV and 160 GeV. • Background process is concerning and analyzing in cheat and real for WW/ZZ. Single Higgs Study

  6. Branching ratios of SM higgs • Zh standard model branch • Mh=120GeV : bb=68%, WW=13%, ZZ=1% • Mh=140GeV : bb=34%, WW=49%, ZZ=7% • Mh=160GeV : bb=4%, WW=91%, ZZ=4% Single Higgs Study

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