共查询到20条相似文献,搜索用时 15 毫秒
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V. Berezinsky 《Il Nuovo Cimento C》1995,18(6):671-684
Summary The status of the Solar-Neutrino Problem (SNP), as is seen in 1995, is reviewed. Basically, there are two principal solutions
to the SNP: i) withstandard neutrino (neutrino of SM of electroweak interactions) and ii) withnon-standard neutrino (neutrino beyond the SM). Actually, one can distinguish three solar-neutrino problems: the deficit of8B neutrinos, the deficit of7Be neutrinos and the HOMESTAKE/KAMIOKANDE conflict. The first problem probably can be solved with small correlated changes
of nuclear cross-sections and the change of the central temperature of the Sun. The deficit of7Be neutrinos looks like the key problem. The HOMESTAKE/KAMIOKANDE conflict strongly disfavours or excludes the standard neutrino
(nuclear/astrophysical solution to the SNP). MSW conversion gives a most plausible explanation to the SNP. 相似文献
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Chen HH 《Physical review letters》1985,55(14):1534-1536
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《Physics letters. [Part B]》1988,213(1):64-68
It is shown that in the presence of matter there can occur resonant amplification of the flavor-changing neutrino spin rotation in transverse magnetic fields, which is roughly analogous to the Mikheyev-Smirnov-Wolfenstein effect in neutrino oscillations. Possible consequences for solar neutrinos are briefly discussed. 相似文献
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Rodrigo Huerta 《Nuclear Physics B》1982,204(3):413-418
The right-handed neutrino cross sections of the processes νL + ? → νR + ? and νR + ? → νR + ?, where ? is a relativistic lepton, are calculated in the SU(2)L × SU(2)R × U(1) model. According to a cosmological criterion the parameters of the model are bounded. In particular we obtain the bound , assuming the neutrinos are Dirac four-component particles. 相似文献
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Ch. Pichot 《Optics Communications》1977,23(2):285-288
A rigorous solution based on an integral equation to investigate the propagation in an inhomogeneous slab of arbitratry index profile is given. 相似文献
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The meaning of N v in the Left-Right Symmetric Model (LRSM) is discussed. In its original definition N v is the number of neutrinos or generations of leptons, so, in the Standard Model its value is three. However the determination of N v in experiments and in astrophysical observations is subject to different theoretical interpretations. We present arguments that gives N v as a parameter of the LRSM. Using an experimental value for the rate Γinv/Γll? we calculate the bound $2.90leq N_{v_{LR}}leq 3.04 (90% {? C.L.})$, where $N_{v_{LR}}$ is a function of the left-right mixing angle ?. This range is less restrictive than the one of the standard model. 相似文献
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