H->bb Weekly Meeting Ricardo Gonçalo (RHUL) HSG5 H->bb weekly meeting, 11 October 2011.

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Presentation transcript:

H->bb Weekly Meeting Ricardo Gonçalo (RHUL) HSG5 H->bb weekly meeting, 11 October 2011

News! News! News! Peak stable lumi 3.31x10 33 cm -2 s fb -1 with stable beams collected so far – 4.6 fb -1 delivered ≈350pb -1 collected last week Pileup peak around 21 25ns run taken on 7 th Oct. with 288 bunches – more on Thursday this week Ricardo GonçaloHSG5 H->bb Weekly Meeting - 11/10/20112

News from ATLAS Week Pixel cluster residuals much reduced for |η|>1 New pixel clustering improves b tagging New single electron trigger since period L: e22vh_medium1 Other useful triggers (for ZH): – 2e12Tvh_medium – e15vh_loose1_e12Tvh_loose1_Zee Glossary: – V = L1 threshold variable in η – H = hadronic core leakage < 1 GeV – T = thin “gap” between L1 and HLT thresholds – Medium1 corresponds to offline “medium++” Ricardo GonçaloHSG5 H->bb Weekly Meeting - 11/10/20113

HSG5 D3PD Status New stream for gamma+bb: – Selection modified to loosen cuts for gamma+bb Z->bb: – Some changes to HighPtTracks mplemented by Ilektra: Lowered pT cut, stored more track info Not yet validated – Adding b-tagging info and more changes to D3PD, will privately produce small validation samples for tests WH->lnubb: Validated by Edinburgh WH stream ready to go to DPD train! – Means getting your D3PDs for new data with no effort… ZH analyses need to check Skim selections before adding this to DPD train! Ricardo GonçaloHSG5 H->bb Weekly Meeting - 11/10/20114 Output Skim#eventsSize HSG5WH5.5 M340 GB HSG5ZHLL5.5 M340 GB HSG5ZHMET4.8 M240 GB HSG5ZBB8 M480 GB Total24 M1.4 TB Input StreamPeriod#eventsSize JetTauEtmissE8,588, TB MuonsE6,182, TB EgammaE8,157, TB JetTauEtmissH37,748, TB MuonsH28,367, TB EgammaH29,506, TB TotalE+H118,551, TB

MC requests Inclusive and boosted H->bb samples for MC11b: – Herwig++ in Powheg – Mass points: M H = 110, 115, 120, 125, 130, 135, 140, 145, 150 GeV – WH->lνbb, ZH->llbb, ZH->ννbb – Both boosted and inclusive for each mass Approved for production – still in waiting list for MC11b production (delays in MC11a) Other samples: – Wbb, Zbb – ZH, WZ, WW -> lljj and llbb final states – Gluon-fusion H->bb See Junichi’s page: b_MC_samples b_MC_samples Ricardo GonçaloHSG5 H->bb Weekly Meeting - 11/10/20115