1,986,962 research outputs found

    First Order Phase Transition in the 3-dimensional Blume-Capel Model on a Cellular Automaton

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    The first order phase transition of the three-dimensional Blume Capel are investigated using cooling algorithm which improved from Creutz Cellular Automaton for the D/J=2.9D/J=2.9 parameter value in the first order phase transition region. The analysis of the data using the finite-size effect and the histogram technique indicate that the magnetic susceptibility maxima and the specific heat maxima increase with the system volume (LdL^{d}) at % D/J=2.9.Comment: 13 pages, 4 figure

    A model of Bˉ0→D∗+ωπ−\bar{B}^0\to D^{*+}\omega\pi^- decay

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    We suggest a parameterization of the matrix element for Bˉ0→D∗+ωπ−\bar{B}^0\to D^{*+}\omega\pi^- decay using kinematic variables convenient for experimental analysis. The contributions of intermediate ωπ\omega\pi- and D∗∗D^{**}-states up to spin 3 have been taken into account. The angular distributions for each discussed hypothesis have been obtained and analysed using Monte-Carlo simulation.Comment: 24 pages, 9 figures, 1 table; V2: text in some places improved and acknowledgments adde

    Studies of charmed strange baryons in the ΛD\Lambda D final state at Belle

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    We report the discovery of Ξc(3055)0\Xi_{c}(3055)^{0}, observed by its decay into the final state ΛD0\Lambda D^{0}, and present the first observation and evidence of the decays of Ξc(3055)+\Xi_c(3055)^{+} and Ξc(3080)+\Xi_c(3080)^{+} into ΛD+\Lambda D^{+}. We also perform a combined analysis of the ΛD+\Lambda D^{+} with the Σc++K−\Sigma_{c}^{++}K^{-} and Σc∗++K−\Sigma_{c}^{\ast ++}K^{-} decay modes to measure the ratios of branching fractions, masses and widths with improved accuracy. We measure the ratios of branching fractions B(Ξc(3055)+→ΛD+)/B(Ξc(3055)+→Σc++K−)=5.09±1.01±0.76{\cal B}(\Xi_{c}(3055)^{+} \to \Lambda D^{+})/{\cal B}(\Xi_{c}(3055)^{+} \to \Sigma_{c}^{++}K^{-})=5.09\pm1.01\pm0.76, B(Ξc(3080)+→ΛD+)/B(Ξc(3080)+→Σc++K−)=1.29±0.30±0.15{\cal B}(\Xi_{c}(3080)^{+} \to \Lambda D^{+})/{\cal B}(\Xi_{c}(3080)^{+} \to \Sigma_{c}^{++}K^{-})=1.29\pm0.30\pm0.15, and B(Ξc(3080)+→Σc∗++K−)/B(Ξc(3080)+→Σc++K−)=1.07±0.27±0.01{\cal B}(\Xi_{c}(3080)^{+} \to \Sigma_{c}^{\ast ++}K^{-})/{\cal B}(\Xi_{c}(3080)^{+} \to \Sigma_{c}^{++}K^{-})=1.07\pm0.27\pm0.01, where the uncertainties are statistical and systematic. The analysis is performed using a 980 fb−1^{-1} data sample collected with the Belle detector at the KEKB asymmetric-energy e+e−e^{+}e^{-} collider.Comment: Submitted to PR
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