45 research outputs found

    Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC

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    A search for doubly charged higgs production in z0 decays

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    Contains fulltext : 124394.pdf (preprint version ) (Open Access

    Search for a scalar top quark using the OPAL detector

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    Contains fulltext : 124482.pdf (preprint version ) (Open Access

    A Measurement of the electroweak couplings of up and down type quarks using final state photons in hadronic z0 decays

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    The production rate of final state photons in hadronic Z0 decays is measured as a function of ycut = Mij2/Ecm2 the jet resolution parameter and minimum mass of the photon-jet system. Good agreement with the theoretical expectation from an O(ααs) matrix element calculation is observed. Comparing the measurement and the prediction for ycut = 0.06, where the experimental systematic and statistical errors and the theoretical uncertainties are small, and combining this measurement with our result for the hadronic width of the Z0, we derived partial widths of up and down type quarks to be Γu = 333 ± 55 ± 72 MeV and Γd = 358 ± 37 ± 48 MeV in agreement with the standard model expectations. We compare our yield with the QCD shower models including photon radiation. At low γcut JETSET underestimates the photon yield, and ARIADNE describes the production rate well

    A Search for scalar leptoquarks in Z0 decays

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    Contains fulltext : 125110.pdf (preprint version ) (Open Access

    Search for massive, unstable photinos that violate R-parity

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    Contains fulltext : 124384.pdf (publisher's version ) (Open Access

    A Study of K0(s) K0(s) Bose-Einstein correlations in hadronic Z0 decays

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    Contains fulltext : 124404.pdf (publisher's version ) (Open Access

    An Improved measurement of the B(s)0 lifetime

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    Contains fulltext : 124533.pdf (preprint version ) (Open Access
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