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Flavor ratios of astrophysical neutrinos interacting with stochastic gravitational waves having arbitrary spectra
Journal of Cosmology and Astroparticle Physics ( IF 6.4 ) Pub Date : 2020-12-10 , DOI: 10.1088/1475-7516/2020/12/022
Maxim Dvornikov

We study the evolution and oscillations of fixed massive neutrinos interacting with stochastic gravitational waves (GWs). The energy spectrum of these GWs is Gaussian and the correlator of the amplitudes is arbitrary. We derive the equation for the density matrix for flavor neutrinos in this case. In the two flavors approximation, this equation can be solved analytically. We find the numerical solution for the density matrix in the general case of three neutrino flavors. We consider merging binary black holes as sources of stochastic GWs with realistic spectra. Both normal and inverted mass orderings are analyzed. We discuss the relaxation of the neutrino fluxes in stochastic GWs emitted mainly by supermassive black holes. In this situation, we obtain the range of energies and the propagation lengths for which the relaxation process is the most efficient. We discuss the application of our results for the observation of fluxes of astrophysical neutrinos.

中文翻译:

天体物理中微子与具有任意光谱的随机引力波相互作用的风味比

我们研究了与随机引力波 (GW) 相互作用的固定大质量中微子的演化和振荡。这些 GW 的能谱是高斯的,幅度的相关器是任意的。在这种情况下,我们推导出风味中微子的密度矩阵方程。在两种风味近似中,该方程可以解析求解。我们在三种中微子味道的一般情况下找到密度矩阵的数值解。我们考虑合并二元黑洞作为具有真实光谱的随机 GW 的来源。分析了正常和反向质量排序。我们讨论了主要由超大质量黑洞发射的随机引力波中中微子通量的弛豫。在这种情况下,我们获得了弛豫过程最有效的能量范围和传播长度。我们讨论了我们的结果在观测天体物理中微子通量方面的应用。
更新日期:2020-12-10
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