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PRIN 2008 Università di Siena

Explore di-boson production in WW and WZ decays to enhance Higgs boson search at CDF utilizing advanced analysis techniques and updating previous analyses with higher statistics samples.

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PRIN 2008 Università di Siena

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  1. PRIN 2008 Università di Siena

  2. PRIN 2008: Siena People’s

  3. PRIN 2008: Papers, Conference Participations and Proceedings Gigafitter See S. Amerio Talk

  4. PRIN 2008: Papers, Conference Participations and Proceedings Diboson analysis in lepton neutrino + jets

  5. PRIN 2008: Papers, Conference Participations and Proceedings B-D0 h- analysis See P. Squillacioti slides

  6. WW + WZ search in the lepton plus jets: goals c) High transverse momentum Physics: WW e WZ search in the lepton plus jets decays and Higgs boson search. The Siena RU, in cooperation with Pisa, is focusing part of its activity on the study of the WW and WZ di-boson production at CDF, considering the leptons plus jets decay modes. These processes already observed in their purely leptonic decay only, have many analogies with the WH and ZH events (the golden processes for low mass Higgs at the TeVatron). For this reason the WW the WZ observation and the tuning of analysis techniques will be an opportunity for future advanced analysis to be applied in the Higgs boson search at CDF. At CDF, the lepton plus jets decays of WW e WZ have already been subject of analysis [32]. Our primary goal will be to update the previous analysis with higher statistics samples and to use advanced analysis techniques that have not yet been applied to these processes. This Item were proposed by P. Catastini and strongly supported by Siena DONE

  7. Diboson analysis in lepton neutrino + jets: Why? Similar topology/final state to WH → lνb ̄b, the golden search mode for (mH < 135 GeV/c2) Similar challenges → S/B WH 1.2% WW/WZ 2.9% WW/WZ→ lνqq ̄ is a proving ground for Higgs search • Potential for new physics is manifest in: • Increased cross sections or changes in kinematics • TGC Golden mode to test the neutral MSSM Higgs φ is the channel Wφ[lνb ̄b] Technicolor predicts that the same signature would be shared by ρT→WπT Expected to show resonant peaks in both the dijet and W+2 jets mass spectra.

  8. Diboson analysis in lepton neutrino + jets:Strategy We treat events from WW and WZ as indistinguishable signals, due to insufficient dijet mass resolution: 10 GeV difference in mass

  9. ? 3.9 fb-1 1079 ± 232(stat) ± 86(syst) W W/W Z → lνjj events σW W +W Z = 14.4 ± 3.1(stat) ± 2.2(syst) pb 4.3 fb-1 PRL published on march 2010: Phys. Rev. Lett. 104, 101801 (2010) Webpage for the update Standard Model prediction 15.9 ± 0.9 pb First presented in Viviana Cavaliere's PhD Thesis Siena 15/12/2010 582 ± 275(stat.) ± 107(syst.) W W/W Z → lνjj events σW W/W Z = 18.1 ± 3.3(stat.) ± 2.5(syst.) pb Diboson analysis in lepton neutrino + jets: Measurements

  10. Data fitted with SM templates 4.3 fb-1 Data fitted with SM templates plus a gaussian component with a sigma compatible with the expected dijet mass resolution. The excess corresponds to 3.2 standard deviations, after accounting for all statistical and systematic uncertainties . Diboson analysis in lepton neutrino + jets: Into the unexpected...

  11. The excess corresponds to 4.1 standard deviations, after accounting for all statistical and systematic uncertainties. Diboson analysis in lepton neutrino + jets: Last results on 7.3 fb-1 Presented at 23rd Rencontres de Blois, May 29-June 3, 2011, by G.Punzi CDF Public Web Page

  12. PRIN 2008: Rideterminazione

  13. BILANCIO DI SPESA PRIN ATENEO 2008

  14. BILANCIO DI SPESA PRIN ATENEO 2008: MOVIMENTI

  15. BILANCIO DI SPESA PRIN 2008 FONDI MIUR

  16. BILANCIO DI SPESA PRIN 2008 FONDI MIUR: MOVIMENTI

  17. BILANCIO DI SPESA FONDI PRIN 2008 MIUR: MOVIMENTI

  18. Backup Slides

  19. Diboson analysis in lepton neutrino + jets: D0 results on 4.3 fb-1 arXiv:1106.1921v2

  20. Fermilab Today Result of the Week Fermilab Today Aug 2009 Fermilab Today April 2011 Viviana Cavaliere PhD thesis Dec-2010 here Viviana Cavaliere Seminar at FNAL on April-6 2011 Invariant Mass Distribution of Jet Pairs Produced in Association with a W boson in proton-antiproton Collisions at sqrt(s) = 1.96 TeV CDF Public Web Page on 7.3 fb-1

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