A search of neutrino magnetic moment was carried out at the Kuo-Sheng Nuclear Power Station at a distance of 28 m from the 2.9 GW reactor core. With a high purity germanium detector of mass 1.06 kg surrounded by scintillating NaI(Tl) and CsI(Tl) crystals as anti-Compton detectors, a detection threshold of 5 keV and a background level of 1 kg(-1) keV(-1) day(-1) at 12-60 keV were achieved. Based on 4712 and 1250 h of reactor ON and OFF data, respectively, the limit on the neutrino magnetic moment of mu(nu;(e))<1.3x10(-10)mu(B) at 90% confidence level was derived. An indirect bound of the nu;(e) radiative lifetime of m(3)(nu)tau(nu)>2.8x10(18) eV(3) s can be inferred.

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.5 ® /0 3 7 0 -2 6 9 3 ( 94) 004 8 7 -R 224 L3 Callaboration / Physics Letters B 328 (1994) We present a study of the inclusive production of 7r°, 77, and A based on 929,000 hadronic Z decays recorded with the L3 detector at LEP. The measured inclusive momentum distributions have been compared with predictions from parton shower models as well as an analytical Quantum Chromodynamics calculation. Comparing to low energy e+e " data, we find that Q CD describes the energy evolution o f the hadron spectrum.

BES data on J/ψ → γ(K + K − π + π − ) are presented. The K * K * contribution peaks strongly near threshold. It is fitted with a broad 0 −+ resonance with mass M = 1800 ± 100 MeV, width Γ = 500 ± 200 MeV. A broad 2 ++ resonance peaking at 2020 MeV is also required with width ∼ 500 MeV. There is further evidence for a 2 −+ component peaking at 2.55 GeV. The non-K * K * contribution is close to phase space; it peaks at 2.6 GeV and is very different from K * K * .PACS numbers: 14.40. Cs, 12.39.Mk, 13.25.Jx, 13.40.Hq Typeset using REVT E X [4]. There, we also find a broad 2 The analysis in this paper uses 7.8 × 10 6 J/ψ triggers collected by the Beijing Spectrometer(BES). This detector has been described in detail in Ref [12]. Here we describe briefly those detector elements crucial to this measurement. Tracking is provided by a 10 superlayer main drift chamber (MDC). Each superlayer contains four layers of sense wires measuring both the position and the ionization energy loss (dE/dx) of charged particles.The momentum resolution is σ P /P = 1.7% A positive identification of at least one K ± and one π ± is required using time of flight and/or dE/dx. If two tracks are ambiguous, both alternative identifications are tried. Events are fitted kinematically to the 4C hypothesis J/ψ → γ(, requiring a confidence level > 5%. If there is more than one photon, the fit is repeated using all permutations.Events with two or more photons are also fitted to J/ψ → γγKThose giving a better fit than to γ(K + K − π + π − ) are rejected, as are events fitting the final stateNext, we require | U miss |=| E miss − P miss |< 0.12 GeV/c 2 , so as to reject the events with multi-photons or more or less than two charged kaons; here, E miss and P miss are, respectively, the missing energy and missing momentum of all charged particles; they are calculated by assuming the charged particles are(GeV/c) 2 is required in order to remove the background J/ψ → π 0