21,103 research outputs found

    Results of time evolution analyses of B-decays at Belle

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    We report results of proper-time evolution analyses of B decays at Belle, based on a 29.1/fb data sample recorded at the Upsilon (4S) resonance. These results include measurements of sin2phi_1, the lifetime of B-mesons, and the mass-difference between two mass eigenstates of the B^0-B^0-bar system (Delta-m_d). Delta-m_d is measured using three different methods: fully reconstructed hadronic modes, a fully reconstructed semi-leptonic mode, and a partially reconstructed D*+ pi- mode.Comment: 13 pages, contributed to the proceedings of the Fifth KEK Topical Conference, 20-22, Nov. 2001, Tsukuba, Japa

    Macroscopic thermodynamics of equilibrium characterized by power-law canonical distributions

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    Macroscopic thermodynamics of equilibrium is constructed for systems obeying power-law canonical distributions. With this, the connection between macroscopic thermodynamics and microscopic statistical thermodynamics is generalized. This is complementary to the Gibbs theorem for the celebrated exponential canonical distributions of systems in contact with a heat bath. Thereby, a thermodynamic basis is provided for power-law phenomena ubiquitous in nature.Comment: 12 page

    Macroscopic proof of the Jarzynski-Wojcik fluctuation theorem for heat exchange

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    In a recent work, Jarzynski and Wojcik (2004 Phys. Rev. Lett. 92, 230602) have shown by using the properties of Hamiltonian dynamics and a statistical mechanical consideration that, through contact, heat exchange between two systems initially prepared at different temperatures obeys a fluctuation theorem. Here, another proof is presented, in which only macroscopic thermodynamic quantities are employed. The detailed balance condition is found to play an essential role. As a result, the theorem is found to hold under very general conditions.Comment: 9 pages, 0 figure

    Quantum Statistical Effects on Fusion Dynamics of Heavy-Ions

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    In order to describe the fusion of two very heavy nuclei at near barrier energies, a generalized Langevin approach is proposed, which incorporates the quantum statistical fluctuations in accordance with the fluctuation and dissipation theorem. It is illustrated that the quantum statistical effects introduce an enhancement of the formation of compound nucleus, though the quantum enhancement is somewhat less pronounced as indicated in the previous calculations.Comment: 17 pages, 6 figure

    T Violation in Baryonic B Decays

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    We study TT violation in the three-body charmless baryonic decay of \bar B^0 \ra \Lambda \bar p \pi^+ through the TT-odd triple product correlation in the standard model. We find that the TT violating asymmetry is 10%, which is accessible to the current B factories at KEK and SLAC, while the CP violating one 1.1%. We emphasize that this triple product correlation would be the first measurable direct TT violating effect predicted in the standard model.Comment: 4 pages, 1 table, parallel talk given at International Conference on QCD and Hadronic Physics, Beijing, China, 16-20 Jun 200
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