Missing heavy flavor backgrounds to Higgs boson production

Details Missing heavy flavor backgrounds to Higgs boson production Missing heavy flavor backgrounds to Higgs boson production

2006-06-26

arxiv.org/abs/hep-ph/0606271v2

Phys.Rev.D74:033008,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pgs., 10 figs, revtex4, 1 Ref. added, minor typos corrected, to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.74.033008

We investigate characteristics of the signal and backgrounds for Higgs boson decay into WW at the Fermilab Tevatron and CERN Large Hadron Collider. In the the lepton-pair-plus-missing-energy final state, we show that the background receives an important contribution from semileptonic decays of heavy flavors. Lepton isolation cuts provide too little suppression of these heavy flavor contributions, and an additional 4 to 8 orders-of-magnitude suppression must come from physics cuts. We demonstrate that an increase of the minimum transverse momentum of nonleading leptons in multilepton events is one effective way to achieve the needed suppression, without appreciable loss of the Higgs boson signal. Such a cut would impact the efficiency of searches for supersymmetry as well. We emphasize the importance of direct measurement of the lepton background from heavy flavor production.

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