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arXiv hep-ph/0005259hep-phastro-phhep-ex
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太阳中微子问题的最简单共振自旋-味解

The Simplest Resonant Spin--Flavour Solution to the Solar Neutrino Problem

O. G. Miranda, C. Peã-Garay, T. I. Rashba, V. B. Semikoz, J. W. F. Valle

摘要:

我们重新分析的太阳中微子问题的共振自旋味(RSF)解决方案的太阳磁流体动力学(MHD)方程的解析解的框架。由于数学上的一致性和物理上的要求,我们基本上消除了与磁场分布有关的任意性,提出了一种利用真实的静态MHD解进行太阳中微子转换的最简单方案(简称MHD-RSF)。使用这种有效的双参数方案,我们进行了第一次全球拟合的最近的太阳中微子数据,包括事件率以及天顶角分布和反冲电子谱引起的太阳中微子相互作用在Superkamiokande。我们定量比较我们最简单的MHD-RSF适合真空振荡(VAC)和MSW型(SMA,LMA和LOW)的太阳中微子问题的解决方案,使用一个共同的校准良好的理论计算和拟合过程。我们发现,我们的MHD-RSF拟合比所得到的有利的中微子振荡的解决方案,虽然不是在统计上显着的方式。我们简要地讨论了在未来的太阳中微子实验中解开我们的MHD-RSF方案的前景,给出了SNO实验的一些预测。

英文摘要:

We re-analyse the resonant spin-flavour (RSF) solutions to the solar neutrino problem in the framework of analytic solutions to the solar magneto-hydrodynamics (MHD) equations. By substantially eliminating the arbitrariness associated to the magnetic field profile due to both mathematical consistency and physical requirements we propose the simplest scheme (MHD-RSF, for short) for solar neutrino conversion using realistic static MHD solutions. Using such effective two-parameter scheme we perform the first global fit of the recent solar neutrino data, including event rates as well as zenith angle distributions and recoil electron spectra induced by solar neutrino interactions in Superkamiokande. We compare quantitatively our simplest MHD-RSF fit with vacuum oscillation (VAC) and MSW-type (SMA, LMA and LOW) solutions to the solar neutrino problem using a common well-calibrated theoretical calculation and fit procedure. We find our MHD-RSF fit to be somewhat better than those obtained for the favored neutrino oscillation solutions, though not in a statistically significant way. We briefly discuss the prospects to disentangle our MHD-RSF scenario at future solar neutrino experiments, giving some predictions for the SNO experiment.

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