Abstract
We present a search for the standard model Higgs boson in final states with an electron or muon and a hadronically decaying tau lepton in association with zero, one, or two or more jets using data corresponding to an integrated luminosity of up to 7.3 fb−1 collected with the D0 detector at the Fermilab Tevatron collider. The analysis is sensitive to Higgs boson production via gluon–gluon fusion, associated vector boson production, and vector boson fusion, and to Higgs boson decays to ττ, WW, ZZ and bb¯ pairs. Observed (expected) limits are set on the ratio of 95% C.L. upper limits on the cross section times branching ratio, relative to those predicted by the Standard Model, of 22 (14) at a Higgs boson mass of 115 GeV and 6.8 (7.7) at 165 GeV.
Highlights
The standard model (SM) of particle physics postulates a complex Higgs doublet field as the source of electroweak symmetry breaking, giving rise to non-zero masses of the vector bosons and fundamental fermions
Collaborations have mainly focused on the decay modes H → bb in the low mass region and H → W W with both W bosons decaying to an electron or muon in the high mass region
In this Letter, we report the results of three searches involving the production of tau leptons that extend the previous results by adding more data, increasing the trigger efficiency, adding new search channels, and considering additional signal contributions
Summary
The standard model (SM) of particle physics postulates a complex Higgs doublet field as the source of electroweak symmetry breaking, giving rise to non-zero masses of the vector bosons and fundamental fermions. A previous D0 publication [6] reported a Higgs boson search in the tau lepton pair plus two jets final state, with one tau decaying to a muon and the other to hadrons, using 1.0 fb−1 of data. In this Letter, we report the results of three searches involving the production of tau leptons that extend the previous results by adding more data, increasing the trigger efficiency, adding new search channels, and considering additional signal contributions. Tau leptons can occur either through direct decays of the Higgs boson (at low mass) or indirectly from H → V V with V decays to τ s (at high mass). “τ ” represents a hadronically decaying tau and “lepton ( )” denotes e or μ
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