Single-top production in the $t{W}^{\pm }$ channel and Higgs signals via $H\to W^{+}{W}^{-}$ at the Large Hadron Collider

Abstract

In a recent study by Dittmar and Dreiner it was shown that with appropriate selection cuts the signature of events containing two charged leptons and missing energy represents the best chance of detecting the Standard Model Higgs scalar in the mass range between 155 and 180 GeV, the primary decay of the Higgs being into pairs of charged gauge bosons. The largest background to this channel is due to irreducible $W^{+}{W}^{-}X$ production. In the present paper we calculate the contribution of events of the type $bg\to t{W}^{\pm }\to b{W}^{+}{W}^{-}\to b{\ell }^{+}{\ell }^{{}^{\prime }-}{\nu }_{\ell }{\bar{\nu }}_{{\ell }^{\prime }}$, which have not been considered yet within the new selection strategy. We show that the yield of this background is rather large, at the level of that produced by $W^{+}{W}^{-}$, $t\bar{t}$ or $tb{W}^{\pm }$ events and thus needs to be incorporated in future experimental analyses. However, we find that its inclusion will not spoil the possibilities of Higgs detection in the above mentioned channel at the Large Hadron Collider.

19 pages, latex, epsfig, 7 postscript figures, paper also available at ftp://axpa.hep.phy.cam.ac.uk/moretti/cavendish_9705 and at http://www.hep.phy.cam.ac.uk/theory/papers/. Text shortened, two tables removed, physics contents unchanged (version to be published in Phys. Rev. D)

References in corpus (1)

• Single top quarks at the Fermilab Tevatron

Cited by in corpus (26)

• Implications of CTEQ global analysis for collider observables
• Single Top Production as a Window to Physics Beyond the Standard Model
• Understanding single-top-quark production and jets at hadron colliders
• Single-top-quark production at hadron colliders
• The t W- Mode of Single Top Production
• Next-to-Leading Order Corrections to Single Top Quark Production and Decay at the Tevatron: 2. $t$-channel Process
• Next-to-leading order QCD corrections to $bg\to t{W}^{-}$ at the CERN Large Hadron Collider
• Single Top Quark at Future Hadron Colliders. Complete Signal and Background Study
• Single Top Quark Production and Decay at Next-to-leading Order in Hadron Collision
• Next-to-Leading Order Corrections to Single Top Quark Production and Decay at the Tevatron: 1. s-channel Process
• Higher-order corrections for $tW$ production at high-energy hadron colliders
• Single top quark tW+X production at the LHC: a closer look
• Soft-gluon corrections for $tW$ production at N${}^3$LO
• Lorentz and CPT Violation in Top-Quark Production and Decay
• Pair production of charged Higgs scalars from electroweak gauge boson fusion
• Next-to-leading order QCD corrections to s-channel single top quark production and decay at the LHC
• Flavour changing strong interaction effects on top quark physics at the LHC
• Future Collider Signatures of the Possible 750 GeV State
• Strong flavour changing effective operator contributions to single top quark production
• Review of Properties of the Top Quark from Measurements at the Tevatron
• Charged di-boson production at the LHC in a 4-site model with a composite Higgs boson
• Top Background Extrapolation for H -> WW Searches at the LHC
• The anomalous top quark coupling tqg and tW production at the LHC
• The Impact of Kaluza-Klein Excited W Boson on the Single Top at LHC and Comparison with other Models
• Constraining dimension-6 SMEFT with higher-order predictions for $pp\to tW$
• $CP$-odd form factor in the $HWW$ vertex