Diboson-jets and the search for resonant Zh production

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New particles at the TeV-scale may have sizeable decay rates into boosted Higgs bosons or other heavy scalars. Here, we investigate the possibility of identifying such processes when the Higgs/scalar subsequently decays into a pair of W bosons, constituting a highly distinctive "diboson-jet." These can appear as a simple dilepton (plus E-T) configuration, as a two-prong jet with an embedded lepton, or as a four-prong jet. We study jet substructure methods to discriminate these objects from their dominant backgrounds. We then demonstrate the use of these techniques in the search for a heavy spin-one Z' boson, such as may arise from strong dynamics or an extended gauge sector, utilizing the decay chain Z' -> Zh -> Z(WW(*)). We find that modes with multiple boosted hadronic Zs and Ws tend to offer the best prospects for the highest accessible masses. For 100 fb(-1) luminosity at the 14 TeV LHC, Z' decays into a standard 125 GeV Higgs can be observed with 5 sigma significance for masses of 1.5-2.5 TeV for a range of models. For a 200 GeV Higgs (requiring nonstandard couplings, such as fermiophobic), the reach may improve to up to 2.5-3.0 TeV.
Publisher
SPRINGER
Issue Date
2012-08
Language
English
Article Type
Article
Citation

JOURNAL OF HIGH ENERGY PHYSICS, no.8

ISSN
1126-6708
DOI
10.1007/JHEP08(2012)160
URI
http://hdl.handle.net/10203/203723
Appears in Collection
PH-Journal Papers(저널논문)
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