1,155 research outputs found
The Phenomenology of Glueball and Hybrid Mesons
The existence of non-q\bar{q} hadrons such as glueballs and hybrids is one of
the most important qualitative questions in QCD. The COMPASS experiment offers
the possibility to unambiguously identify such states and map out the glueball
and hybrid spectrum. In this review I discuss the expected properties of
glueballs and hybrids and how they might be produced and studied by the COMPASS
collaboration.Comment: Invited talk at the Workshop on Future Physics @ COMPASS, CERN, Sept
26-27 2002. 12 pages, 6 figures. Uses cernrep.cls (included
Exploring Higgs Triplet Models via Vector Boson Scattering at the LHC
We present the results of a study of Higgs triplet boson production arising
in the Littlest Higgs, Left-Right Symmetric, and Georgi-Machacek models in the
W^\pm W^\pm, W^\pm Z, W^+ W^-, and Z Z channels at the LHC. We focus on the
"gold-plated" purely leptonic decay modes and consider the irreducible
electroweak, QCD, and t-quark backgrounds, applying a combination of
forward-jet-tagging, central-jet-vetoing, and stringent leptonic cuts to
suppress the backgrounds. We find that, given the constraints on the triplet
vacuum expectation value (vev), considerable luminosity is required to observe
Higgs triplet bosons in vector boson scattering. Observing a Higgs triplet at
the LHC is most promising in the Georgi-Machacek model due to a weaker
constraint on the triplet vev. In this model, we find that a Higgs triplet
boson with a mass of 1.0 (1.5) TeV can be observed at the LHC with an
integrated luminosity as low as 41 (119) fb^{-1} in the W^\pm W^\pm channel and
as low as 171 (474) fb^{-1} in the W^\pm Z channel. Observation of Higgs
triplet bosons in these channels would help identify the underlying theory.Comment: 14 pages, 11 figures, references adde
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