The search for nucleon decay at Super-Kamiokande

被引：12
|
作者：
Ganezer, KS [1 ]
机构：
[1] Calif State Univ Dominguez Hills, Dept Phys, Carson, CA 90747 USA
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS A | 2001年 / 16卷
关键词：
nucleon decay; Super-Kamiokande; atmospheric neutrinos;
D O I：
10.1142/S0217751X01008308
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
We have analyzed 1144 days of Super-Kamiokande data for 13 of the more than 40 possible nucleon decay modes. We have studied p --> e(+)pi(0), and twelve other two particle B-L conserving decay modes including those with kaons that are preferred in supersymmetric theories. Most modes are currently free of candidate events. In all cases the number of candidates is consistent with atmospheric neutrino induced backgrounds. We have calculated 90% confidence level single sided lower limits on the lifetime of the neutron and proton (divided by the unknown branching ratio) for the studied modes. All of our lower limits are higher than previous best limits by a factor of 2-10. Our limit for p --> e(+)pi(0) is now 4.4 X 10(33) years.
引用
收藏
页码：855 / 859
页数：5
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