A search for inclusive muon-neutrino (v^) oscillations has been performed in the Fermilab narrow-band neutrino beam using two detectors running simultaneously at two distances from the neutrino source. The data show no evidence for a distance dependence of the neutrino flux and rule out oscillations of v^ into any other single type of neutrino for 30 < Am 2 < 1000 eV 2 /c 4 and sin 2 (20) > 0.02-0.20.

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Results from a partial-wave analysis of the decay J/y/-+ yK §K ± n "*" in the K §K ± n + invariant-mass range 1.35-1.6 GeV/c 2 are presented. Within the isobar model, the data in this mass range are best described by a mixture of 0~+ and 1 ++ amplitudes, corresponding to the A r *A' + c.c. (P wave), A^A' + c.c. (5 wave), and <2o(980)/r (5 wave) channels. These results show that r/(1430) is not a J PCs =0 ~ + flo(980);r resonance, but a mixture of overlapping states.

A new technique is applied to data collected at the 0(3770) resonance to derive charmed-Dmeson branching fractions without relying on the measurement of D-production cross sections. Measurements are presented for three decay modes of the D° (K~TT + , D~ * and K-TT + TT 0 ) and four decay modes of the D + (K~7r + 7r + , K-TT + TT + TT 0 , K$<7T + , and tf 5°i r + ir 0 ). The resulting branching fractions are significantly larger than previous measurements.

We present measurements of the two-body decays of the J/$ into a vector and a pseudoscalar meson. The data, taken with the Mark I11 detector at the SLAC e + e -storage ring SPEAR, consist of 5.8 X lo6 produced J/+'s. The branching ratios for the J/$ decays into pn, pg, pq', on0, og, wg', $17, r#Jgl, and K*K are measured; an upper limit on J / $ -~T ' is obtained. Using the measured branching ratios we obtain parameters of a phenomenological model of J/$ decays, indicating that the g and g' are consistent with being composed only of light and strange quarks. The model is used to obtain the mixing angle in the pseudoscalar nonet. The m a 0 electromagnetic form factor is determined. The upper limit on J/*-+r#Jno is used to study the contributions from electromagnetic doubly-Okubo-Zweig-Iizuka-suppressed decays of the J/+.