Search for 4-jet Final States at P S = 130{136 Gev Using the Opal Detector
نویسنده
چکیده
The OPAL collaboration has searched for the associated production of massive particles in 4-jet nal states at e + e ? center-of-mass energies of p s = 130{136 GeV at LEP. In this note we present preliminary upper limits on the production cross section of narrow states X and Y in the process
منابع مشابه
How Well Does Qcd Work for Photon-photon Collisions?
The performance of QCD in describing hadronic photon-photon collisions is investigated in the light of recent measurements from LEP on di-jet production, light hadron transverse momentum spectra, and heavy quark production. Differential di-jet cross sections have been measured by DELPHI 1 and OPAL 2. DELPHI has analysed 220 pb −1 of data taken at √ s ee =192-202 GeV using a cone algorithm with ...
متن کاملOverview of searches for supersymmetry with the ATLAS detector
ATLAS searches for supersymmetry in data from the 2010 and 2011 running of the LHC will be reviewed. These searches were performed in various channels containing different lepton and jet multiplicities in the final state. Although ATLAS searches for supersymmetry in channels both with and without missing transverse momentum, this talk will concentrate on the missing transverse momentum channels...
متن کاملSearch for supersymmetry in top final states at CMS
A search for SUSY using the top quark plus missing transverse energy (MET), in a low mass mSUGRA test point is performed. A two–constraints kinematic fit is utilized to extract the top quark, either b-jet the ones that is recognizable or it is not recognizable. It is shown that for point LM1, for the former situation, a 5σ excess can be achieved with 30 pb-1 and for the latter situation, it can...
متن کاملScaling Violations of Quark and Gluon Jet Fragmentation Functions in Ee Annihilations
Hadron production in high energy collisions can be described by parton showers, followed by the formation of hadrons which cannot be described perturbatively. Gluon emission, the dominant process in parton showers, is proportional to the colour factor associated with the coupling of the emitted gluon to the emitter. These colour factors are CA = 3 when the emitter is a gluon and CF = 4/3 when i...
متن کاملDiscovery Potential of the Standard Model Higgs Boson Through H → WW Decay Mode with the ATLAS Detector at LHC
We report results of a study of the Standard Model Higgs boson discovery potential through the W-pair leptonic decay modes with the ATLAS detector at LHC at 14 TeV center-of-mass energy. We used MC samples with full detector simulation and reconstruction of the ATLAS experiment to estimate the ATLAS detection sensitivity for the reaction of pp→ H →WW → eνμν with no hard jet or two hard jets in ...
متن کامل