arXiv subjects
Publications and source records attributed to Masahiro Kaneyama.
Assuming the Ornstein-Uhlenbeck process and relativistic diffusion equations with three sources at y = 0, we analyze eta-distributions of d+Au collision as well as Au+Au collisions at sqrt{s_{NN}} = 130 GeV and 200 GeV.
To explain η-distributions at RHIC energies we consider the Ornstein-Uhlenbeck process. To account for hadrons produced in the central region, we assume existence of third source located there (y \approx 0) in addition to two sources located at the beam and target rapidities (\pm y_{max} = \pm \ln[\sqrt{s_{NN}}/m_{N}]). This results in better χ^2/n.d.f. than those for only two sources when analysing data.
Using an exact solution with the hyperbolic-tangent profile for the electron density in the sun, which is developed by Nötzold and later modified by Nakagawa, we have analyzed the solar neutrino problem. An interference term in their approach is correctly taken into account. Combining the hyperbolic-tangent profile with the BP2000, we obtain a phenomenological fitting in the analytic form. Combining recent observed results for survival probability $P(ν_e \to ν_e)$ by the SNO, SK, SAGE, Gallex, GNO and Homestake Collaborations, we obtain a large mixing angle (LMA) whose figure is looking like a shoulder.