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arXiv 0912.4028hep-phastro-ph.HE
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来自隐藏喷流的宇宙中微子的味转换

Flavor conversion of cosmic neutrinos from hidden jets

Soebur Razzaque, A. Yu. Smirnov

摘要:

高能宇宙中微子流可以在坍缩恒星包层下的相对论喷流中产生。在E ~(0.3 - 1 e5)GeV能量范围内,这些中微子的味转换受到恒星和地球内部各种物质效应的影响。我们提出了一个全面的(包括分析和数值)描述这些中微子的味道转换,其中包括:(i)振荡内喷流,(ii)味道到质量的状态转换的信封,(iii)损失的连贯性的方式来观察,(iv)振荡的质量状态内的地球。我们发现,转换有几个新的功能,没有实现在其他对象,特别是干扰效应(“L-和H-摆动”)引起的绝热违反。在E > 1 e4 GeV时,喷流内部的中微子-中微子散射和包层中的非弹性中微子相互作用可能产生一些额外的特征。我们研究的概率和风味比在受影响的区域上的角度θ 13和θ 23,CP相位三角洲,以及对初始的味道含量和密度分布的恒星的依赖。我们表明,测量的风味比的能量依赖性,在原则上,允许独立地确定中微子和天体物理参数。

英文摘要:

High energy cosmic neutrino fluxes can be produced inside relativistic jets under the envelopes of collapsing stars. In the energy range E ~ (0.3 - 1e5) GeV, flavor conversion of these neutrinos is modified by various matter effects inside the star and the Earth. We present a comprehensive (both analytic and numerical) description of the flavor conversion of these neutrinos which includes: (i) oscillations inside jets, (ii) flavor-to-mass state transitions in an envelope, (iii) loss of coherence on the way to observer, and (iv) oscillations of the mass states inside the Earth. We show that conversion has several new features which are not realized in other objects, in particular interference effects ("L- and H- wiggles") induced by the adiabaticity violation. The neutrino-neutrino scattering inside jet and inelastic neutrino interactions in the envelope may produce some additional features at E > 1e4 GeV. We study dependence of the probabilities and flavor ratios in the matter-affected region on angles theta13 and theta23, on the CP-phase delta, as well as on the initial flavor content and density profile of the star. We show that measurements of the energy dependence of the flavor ratios will, in principle, allow to determine independently the neutrino and astrophysical parameters.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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