Neutrino refraction by the cosmic neutrino background

被引:9
作者
Diaz, J. S. [1 ]
Klinkhamer, F. R. [1 ]
机构
[1] Karlsruhe Inst Technol, Inst Theoret Phys, D-76128 Karlsruhe, Germany
关键词
EARLY UNIVERSE; FERMI POINTS; OSCILLATIONS; MATTER; MASS; TEMPERATURE; COSMOLOGY; SEARCHES; DENSITY;
D O I
10.1103/PhysRevD.93.053004
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We have determined the dispersion relation of a neutrino test particle propagating in the cosmic neutrino background. Describing the relic neutrinos and antineutrinos from the hot big bang as a dense medium, a matter potential or refractive index is obtained. The vacuum neutrino mixing angles are unchanged, but the energy of each mass state is modified. Using a matrix in the space of neutrino species, the induced potential is decomposed into a part which produces signatures in beta-decay experiments and another part which modifies neutrino oscillations. The low temperature of the relic neutrinos makes a direct detection extremely challenging. From a different point of view, the identified refractive effects of the cosmic neutrino background constitute an ultralow background for future experimental studies of nonvanishing Lorentz violation in the neutrino sector.
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页数:7
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