RALPH MORRISON

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We have measured the branching fraction and photon energy spectrum for the radiative penguin process b → sγ. We find B(b → sγ) = (3.21 ± 0.43 ± 0.27 −0.10) × 10 , where the errors are statistical, systematic, and from theory corrections. We obtain first and second moments of the photon energy spectrum above 2.0 GeV, 〈Eγ〉 = 2.346± 0.032± 0.011 GeV, and 〈E(More)
We report a new measurement of the Cabibbo-Kobayashi-Maskawa parameter Vub made with a sample of 9.7 x 10(6) BB- events collected with the CLEO II detector. Using heavy quark theory, we combine the observed yield of leptons from semileptonic B decay in the end-point momentum interval 2.2-2.6 GeV/c with recent CLEO II data on B-->X(s)gamma to find Vub =(More)
Historically, marine resources have provided a major protein source for the people of Guam, and fishing is still and important commercial and recreational activity. Local inhabitants commonly harvest a variety of algae, molluscs, crustaceans, sea cucumbers and fish for sale and home consumption (Amesbury et al., 1986). These resources have been relatively(More)
Using data collected with the CLEO II detector we have performed a search for direct CP violation in the Ξ hyperon system. CP violation gives rise to an asymmetry, A, between the parity-violating angular distributions of the decay chains Ξ → Λπ, Λ → pπ and Ξ̄ → Λ̄π, Λ̄ → p̄π. In the Standard Model, A ≈ 10 to 10. If CP violation were found at a higher level(More)
We present preliminary results on b → sγ from the CLEO experiment. An updated result on the branching fraction is reported at B(b → sγ) = (3.15 ± 0.35±0.32±0.26)×10 , where the first uncertainty is statistical, the second is systematic, and the third for model dependence. We also describe a new analysis performed to search for CP asymmetry in b → sγ decays.(More)
We present preliminary results of several analyses searching for the effects of CP violation and mixing in the decay ofD0 mesons. We find no evidence of CP asymmetry in five different two-body decay modes of the D0 to pairs of light pseudo-scalar mesons: ACP (K +K−) = (+0.05±2.18±0.84)%, ACP (π+π−) = (+2.0±3.2±0.8)%, ACP (K0 Sπ) = (+0.1±1.3)%, ACP (π0π0) =(More)
We have studied two-body charmless hadronic decays of B mesons into the final states ππ, Kπ, and KK. Using 3.3 million BB̄ pairs collected with the CLEO-II detector, we have made the first observation of the decays B → Kπ, B → Kπ, and the sum of B → ππ and B + → Kπ decays (an average over charge-conjugate states is always implied). We place upper limits on(More)
We speciated arsenic compounds in marine fish and shellfish from two islands of the United States Territory of American Samoa in the South Pacific, and found that inorganic arsenic occurred as a minor fraction. The proportion of inorganic arsenic was generally far below the levels of prevailing assumptions typically used in human health risk assessments(More)