NEUTRINO-RESONANT OSCILLATIONS IN THE EARTH, AND THE NU-E/NU-MU RATIO IN UPWARD-GOING ATMOSPHERIC NEUTRINO FLUXES

被引：4
|
作者：
MINORIKAWA, Y [1 ]
MITSUI, K [1 ]
机构：
[1] UNIV TOKYO,INST COSM RAY RES,TANASHI,TOKYO 188,JAPAN
来源：
EUROPHYSICS LETTERS | 1990年 / 11卷 / 07期
关键词：
D O I：
10.1209/0295-5075/11/7/005
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We evaluate the conversion probability for neutrinos by solving the evolution equations with a numerical method, taking into account a density distribution of the Earth, and calculate an upward-going neutrino flux ratio (v, + Fe)/(vy + YJ by using the recent values of atmospheric neutrino fluxes, where the updated ratios v 1; and vel;, have been taken into account. It is found that the ratio, including the effect of neutrino-resonant oscillations, can well Y explain the Kamiokande data for $ = 0" and 30°, and the NUSEX and the Frejus data (averaged over $1 at energies around 1 GeV, whilst the ratio with no neutrino oscillations or with the muon polarization cannot explain the measured data. © 1990 IOP Publishing Ltd.
引用
收藏
页码：607 / 611
页数：5
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