H->bbbar Final State Subgroup (LHC HXS WG)

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Group Contacts and Contributors

All contributors are welcome!

Meeting Agendae

Plan of Activity

  • VH->Vbb differential K-factor (LO to NLO) in signal and background after common cuts with MC@NLO and POWHEG
  • ttH->ttbb differential K-factor (LO to NLO) in signal with aMC@NLO
  • evaluation of VH->Vbb and ttH->ttbb cross section uncertainties at NLO after common cuts

Common cuts definition between CMS/ATLAS/LHCb

VH->Vbb for LHCb

Boosted VH->Vbb

  • pt(H)>200 GeV
  • pt(V)>200 GeV
  • No additional C/A jets with pt > 20 GeV (|eta|<2.4)

Non-boosted VH->Vbb (PRELIMINARY proposal from ATLAS)

  • pT(e/mu) > 20-25GeV
  • |eta(e/mu)| < 2.5
  • 2 jets with pT>25GeV
  • MET > 25GeV (????)

Non-boosted ttH->ttbb

  • exactly one isolated lepton with pt>25 GeV (20 GeV) e(mu).
  • >=6 jets with pt>20 GeV
  • >=4 b-tagged jets with pt>20 GeV

Boosted ttH->ttbb

  • pT(H)>2*mH

Baseline Common Parameters

Use the parameters from this TWiki. These will be updated with PDG2010 (they are now PDG2009). For PDFs, use the NLO PDFs recommended by PDF4LHC: CTEQ6.6, MSTW2008nlo, NNPDF2.0.

Available Tools



-- ReiTanaka - 02-Oct-2010

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Topic revision: r11 - 2014-11-04 - ReiTanaka
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