21 research outputs found

    Photoproduction of pions and properties of baryon resonances from a Bonn-Gatchina partial wave analysis

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    Masses, widths and photocouplings of baryon resonances are determined in a coupled-channel partial wave analysis of a large variety of data. The Bonn-Gatchina partial wave formalism is extended to include a decomposition of t- and u-exchange amplitudes into individual partial waves. The multipole transition amplitudes for γp→pπ0\gamma p\to p\pi^0 and γp→nπ+\gamma p\to n\pi^+ are given and compared to results from other analyses.Comment: 18 pages, 14 figure

    P-wave excited baryons from pion- and photo-induced hyperon production

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    We report evidence for N(1710)P11N(1710)P_{11}, N(1875)P11N(1875)P_{11}, N(1900)P13N(1900)P_{13}, Δ(1600)P33\Delta(1600)P_{33}, Δ(1910)P31\Delta(1910)P_{31}, and Δ(1920)P33\Delta(1920)P_{33}, and find indications that N(1900)P13N(1900)P_{13} might have a companion state at 1970\,MeV. The controversial Δ(1750)P31\Delta(1750)P_{31} is not seen. The evidence is derived from a study of data on pion- and photo-induced hyperon production, but other data are included as well. Most of the resonances reported here were found in the Karlsruhe-Helsinki (KH84) and the Carnegie-Mellon (CM) analyses but were challenged recently by the Data Analysis Center at GWU. Our analysis is constrained by the energy independent πN\pi N scattering amplitudes from either KH84 or GWU. The two πN\pi N amplitudes from KH84 or GWU, respectively, lead to slightly different πN\pi N branching ratios of contributing resonances but the debated resonances are required in both series of fits.Comment: 22 pages, 28 figures. Some additional sets of data are adde

    Properties of baryon resonances from a multichannel partial wave analysis

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    Properties of nucleon and Δ\Delta resonances are derived from a multichannel partial wave analysis. The statistical significance of pion and photo-induced inelastic reactions off protons are studied in a multichannel partial-wave analysis.Comment: 12 pages, 8 Table

    Correcting posthypoxic damage of myocardium in newborns with cerebral ischemia

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    A multicenter trial involving 30 newborns with post-hypoxic myocardial lesions associated with I-II degree cerebral ischemia has revealed that the inclusion of cytoflavin infusions into the complex standard treatment leads, besides the improvement of general clinical status, to significantly more rapid, as compared to the control group, positive dynamics of pump and contractile myocardial functions, elimination of hyperenzymemia, hypoxia and electrical instability of the myocardium, decrease in energetic deficit, and repolarization changes within the first 5 days of in-hospital therapy as well as during the follow-up from 1 to 6 months of life

    Correcting posthypoxic damage of myocardium in newborns with cerebral ischemia

    No full text
    A multicenter trial involving 30 newborns with post-hypoxic myocardial lesions associated with I-II degree cerebral ischemia has revealed that the inclusion of cytoflavin infusions into the complex standard treatment leads, besides the improvement of general clinical status, to significantly more rapid, as compared to the control group, positive dynamics of pump and contractile myocardial functions, elimination of hyperenzymemia, hypoxia and electrical instability of the myocardium, decrease in energetic deficit, and repolarization changes within the first 5 days of in-hospital therapy as well as during the follow-up from 1 to 6 months of life
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