190 research outputs found

    Search for supersymmetry with a dominant R-parity violating LQDbar couplings in e+e- collisions at centre-of-mass energies of 130GeV to 172 GeV

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    A search for pair-production of supersymmetric particles under the assumption that R-parity is violated via a dominant LQDbar coupling has been performed using the data collected by ALEPH at centre-of-mass energies of 130-172 GeV. The observed candidate events in the data are in agreement with the Standard Model expectation. This result is translated into lower limits on the masses of charginos, neutralinos, sleptons, sneutrinos and squarks. For instance, for m_0=500 GeV/c^2 and tan(beta)=sqrt(2) charginos with masses smaller than 81 GeV/c^2 and neutralinos with masses smaller than 29 GeV/c^2 are excluded at the 95% confidence level for any generation structure of the LQDbar coupling.Comment: 32 pages, 30 figure

    Measurement of the D±^{*\pm} cross section in two photon collisions at LEP

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    Study of the Bs0Bˉs0B^0_s \bar{B}^0_s oscillation frequency using Dsl+D^-_s l^+ combinations in Z decays

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    Measurement of the tau lepton lifetime

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    Measurement of Lambda polarization from Z decays

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    Search for excited leptons at 130-140 GeV

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    Search for supersymmetric particles in e+ee^+e^- collisions at centre-of-mass energies of 130 and 136 GeV

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    Measurement of the tau lepton lifetime

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    Measurement of Lambda polarization from Z decays

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    Tau leptonic branching ratios

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