221 research outputs found

    Constraints on anomalous QGC's in e+ee^{+}e^{-} interactions from 183 to 209 GeV

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    The acoplanar photon pairs produced in the reaction e(+) e(-) - → vvyy are analysed in the 700 pb(-1) of data collected by the ALEPH detector at centre-of-mass energies between 183 and 209 GeV. No deviation from the Standard Model predictions is seen in any of the distributions examined. The resulting 95% C.L. limits set on anomalous QGCs, a(0)(Z), a(c)(Z), a(0)(W) and a(c)(W), are -0.012 lt a(0)(Z)/Lambda(2) lt +0.019 GeV-2, -0.041 lt a(c)(Z)/Lambda(2) lt +0.044 GeV-2, -0.060 lt a(0)(W)/Lambda(2) lt +0.055 GeV-2, -0.099 lt a(c)(W)/Lambda(2) lt +0.093 GeV-2, where Lambda is the energy scale of the new physics responsible for the anomalous couplings

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

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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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    Measurement of the tau lepton lifetime

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    Measurement of Lambda polarization from Z decays

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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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    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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    Tau leptonic branching ratios

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